NOVA CHEMICALS (INTERNATIONAL) S.A. Patent applications |
Patent application number | Title | Published |
20160108223 | HDPE ARTICLES - This disclosure relates to manufactured articles containing ethylene interpolymers. Specifically, films, containers and lids comprising at least one layer of an ethylene interpolymer product, or a blend containing an ethylene interpolymer product, where the ethylene interpolymer product has: a Dilution Index (Y | 04-21-2016 |
20160108222 | ETHYLENE INTERPOLYMERS HAVING IMPROVED COLOR - This disclosure relates to a continuous solution polymerization process where ethylene interpolymer products having an improved color index; for example, products having higher whiteness (Whiteness Index (WI)) and lower yellowness (Yellowness Index (YI)). Product color was improved by adjusting selected solution polymerization reaction conditions. The disclosed ethylene interpolymer products have improved color relative to comparative polyethylene compositions. | 04-21-2016 |
20160108221 | SOLUTION POLYMERIZATION PROCESS - This disclosure relates to a continuous solution polymerization process wherein production rate is increased. Process solvent, ethylene, optional comonomers, optional hydrogen and a single site catalyst formulation are injected into a first reactor forming a first ethylene interpolymer. Process solvent, ethylene, optional comonomers, optional hydrogen and a heterogeneous catalyst formulation are injected into a second reactor forming a second ethylene interpolymer. The first and second reactors may be configured in series or parallel modes of operation. Optionally, a third ethylene interpolymer is formed in an optional third reactor, wherein an optional heterogeneous catalyst formulation may be employed. In a solution phase, the first, second and optional third ethylene interpolymers are combined, the catalyst is deactivated, the solution is passivated and following a phase separation process an ethylene interpolymer product is recovered. | 04-21-2016 |
20160108218 | DILUTION INDEX - This disclosure relates to ethylene interpolymer compositions. Specifically, ethylene interpolymer products having: a Dilution Index (Y | 04-21-2016 |
20160108196 | ETHYLENE INTERPOLYMER FILMS - This disclosure relates to multilayer films having improved caulkability. These multilayer films have at least one layer containing an ethylene interpolymer product, or a blend containing an ethylene interpolymer product, where the ethylene interpolymer product has: a Dilution Index (Y | 04-21-2016 |
20160108186 | CAPS AND CLOSURES - This disclosure relates to caps and closures manufactured from an ethylene interpolymer product, or a blend containing an ethylene interpolymer product, where the ethylene interpolymer product has: a Dilution Index (Y | 04-21-2016 |
20160108185 | ROTOMOLDED ARTICLES - This disclosure relates to rotomolded articles, having a wall structure, where the wall structure contains at least one layer containing an ethylene interpolymer product, or a blend containing an ethylene interpolymer product, where the ethylene interpolymer product has: a Dilution Index (Y | 04-21-2016 |
20160083539 | SHRINK FILM FROM SINGLE SITE CATALYZED POLYETHYLENE - Shrink film having a desirable balance of properties is manufactured from a polyethylene blend composition having a fractional melt index and a molecular weight distribution of from about 2.5 to about 7. The blend composition comprises a first blend component that is made with a single site catalyst and has a molecular weight of greater than about 140,000 and a first density, d | 03-24-2016 |
20160070885 | REDUCTION OF FOULING IN HIGH PRESSURE REACTORS - The Application of equations of state to experimental and literature data permits the formation of a model and phase diagram(s) that show under what conditions polyethylene is likely to precipitate out of a high pressure solution of polyethylene in supercritical ethylene. This then permits a better definition to run a high pressure reactor to reduce the likelihood of phase separation, loss of cooling and potentially decomposition of the reactor contents. | 03-10-2016 |
20160068617 | REDUCTION OF FOULING IN HIGH PRESSURE REACTORS - The Application of equations of state to experimental and literature data permits the formation of a model and phase diagram(s) that show under what conditions polyethylene is likely to precipitate out of a high pressure solution of polyethylene in supercritical ethylene. This then permits a better definition to run a high pressure reactor to reduce the likelihood of phase separation, loss of cooling and potentially decomposition of the reactor contents. | 03-10-2016 |
20160060425 | RECYCLABLE, GREASE RESISTANT PACKAGING - Grease resistant packaging is prepared from a high density polyethylene (HDPE) composition that contains a nucleating agent. Outstanding results are observed when the nucleated HDPE composition is included in an internal layer of a multilayer packaging structure. The use of HDPE that is prepared with a chromium or titanium (especially titanium) containing catalyst is preferred. The packaging may be in the form of a monolayer film, a multilayer film, a sheet or a molded part. | 03-03-2016 |
20160046745 | ZIEGLER-NATTA CATALYST FOR HIGH TEMPERATURE POLYMERIZATION - The various embodiments of the invention provide, a magnesium titanium polymerization procatalyst, methods for making and using the same. | 02-18-2016 |
20160002448 | ENHANCED ESCR BIMODAL ROTOMOLDING RESIN - The present disclosure provides a resin suitable for use in rotational molding having an environmental stress crack resistance of greater than 1000 hours. The resin has a density from 0.937 to 0.942 g/cm | 01-07-2016 |
20160002370 | SOLUTION POLYMERIZATION PROCESSES WITH REDUCED ENERGY USAGE - An improved solution polymerization process wherein energy consumption is reduced comprising: i) injecting ethylene, solvent, catalyst, α-olefins and hydrogen into at least one reactor to produce a polyethylene in a single liquid phase solution; ii) deactivating the single liquid phase solution; iii) passing the deactivated solution into a vapor/liquid separator forming a bottom stream of polyethylene rich solvent and a gaseous overhead stream; iv) passing not more than 40% of the gaseous overhead stream to distillation; v) condensing the remainder of the gaseous overhead stream to form a recycle stream, while generating low pressure steam; vi) passing the recycle stream through a means for oligomer removal; vii) passing the recycle stream through a lights separator; viii) passing the recycle stream through a purification step; ix) collecting the recycle stream in a recycle drum, passing the recycle stream through a pump and injecting a high pressure recycle stream into said reactors. | 01-07-2016 |
20160001257 | FURNACE COIL FINS - The present invention provides low profile, thick (“stuby”) longitudinal fins having a cross section which is a parallelogram, trapezoid or a triangle extending from 10% to 100% of a coil pass and comprising from 3 to 45 weight % of a coil in a radiant section of a furnace for thermally cracking one or more of paraffins and naphtha. The fins provide an additional surface through which heat may be transferred to the coil making the coil more efficient reducing greenhouse emissions. | 01-07-2016 |
20150376313 | ROTOMOLDING RESIN - Resins suitable for rotomolded articles comprise a bimodal polyethylene copolymer comprising from 0.1 to 5 weight % of one or more C | 12-31-2015 |
20150353715 | POLYETHYLENE COMPOSITIONS AND CLOSURES MADE FROM THEM - A dual reactor solution process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have good processability, stiffness, and environmental stress crack resistance. The polyethylene compositions are suitable for compression molding or injection molding applications and are particularly useful in the manufacture of caps and closures for bottles. | 12-10-2015 |
20150344683 | REDUCING FOULING IN HEAT EXCHANGERS - In the solution polymerization of ethylene co and homopolymers the solution leaving the reactor is heated to separate polymer from solvent and residual monomers. Fouling in the heat exchanger may be reduced by adding to the solution from 0.01 to 100 ppm by weight of a polyoxyalkylene compound of the formula | 12-03-2015 |
20150329658 | PASSIVATED SUPPORTS FOR USE WITH OLEFIN POLYMERIZATION CATALYSTS - A phosphinimine catalyst immobilized on a passivated inorganic oxide support, had high activity at low co-catalyst concentrations and gave, under gas phase polymerization conditions, ethylene copolymer with a high molecular weight. A method of making a passivated silica support involves treatment of silica with an organoaluminum compound, a diorganomagnesium compound and a source of chloride (to make MgCl | 11-19-2015 |
20150315314 | ETHYLENE COPOLYMER COMPOSITIONS, FILM AND POLYMERIZATION PROCESSES - Ethylene copolymers having a relatively high melt flow ratio and a multimodal profile in a temperature rising elution fractionation (TREF) plot are disclosed. The copolymers can be made into film having good dart impact values and good stiffness properties under decreased extruder pressures. | 11-05-2015 |
20150299448 | STABILIZED POLYETHYLENE - Polyethylene is often stabilized with the combination of a primary antioxidant (such as a hindered phenol, a hydroxylamine or a lactone) and a secondary antioxidant (such as a phosphonite, a monophosphite, or a diphosphite). The diphosphite additives are not completely compatible with “linear” polyethylene. This results in “blooming” of the diphosphite to the surface of the finished polyethylene part or polyethylene film. The use of a preblend of ethylene vinyl alcohol (EVOH) and diphosphite mitigates this problem. | 10-22-2015 |
20150284552 | POLYETHYLENE BLEND COMPOSITIONS AND FILM - A polymer blend comprising first and second polyethylene copolymers is presented which has good processability, and which when made into film shows good toughness-stiffness balance, reasonable MD tear, as well as good optical properties. | 10-08-2015 |
20150284303 | CONTINUOUS ETHYLENE TETRAMERIZATION PROCESS - A continuous flow process for the oligomerization of ethylene using a chromium catalyst having a phosphorus-nitrogen-phosphorus (“P—N—P”) ligand provides high selectivity to the desired tetramer (1-octene) with reduced production of coproduct C | 10-08-2015 |
20150260632 | SERPENTINE FLUID REACTOR COMPONENTS - Some embodiments of the present invention provide components for a serpentine fluid reactor which is optimized for one or more objective functions of interest such as pressure drop, erosion rate, fouling, coke deposition and operating costs. The components are designed by computer modeling the components individually and collectively in which the cross section of flow path is substantially circular under industrial conditions to validate the model design and its operation. Then iteratively the component designs are deformed and the operation of the deformed part(s) is modeled and compared to values obtained with other deformed models until the value of the objective function is optimized (e.g. at an extreme) or the change in the objective function is approaching zero. | 09-17-2015 |
20150259519 | POLYETHYLENE COMPOSITIONS HAVING HIGH DIMENSIONAL STABILITY AND EXCELLENT PROCESSABILITY FOR CAPS AND CLOSURES - A dual reactor solution polymerization process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have high dimensional stability, excellent processability as well as good organoleptic properties and reasonable stress cracking resistance. The polyethylene compositions are suitable for compression molding or injection molding applications and are useful, for example, in the manufacture of caps and closures for bottles, and for example, in bottles containing non-pressurized liquids. | 09-17-2015 |
20150252159 | Ethylene Copolymers, Film and Polymerization Process - Ethylene copolymers having a relatively high melt flow ratio and a multimodal profile in a temperature rising elution fractionation (TREF) plot are disclosed. The copolymers can be made into film having good dart impact values and good stiffness properties under decreased extruder pressures. | 09-10-2015 |
20150240168 | PINNED FURNACE TUBES - In an embodiment of the invention, furnace tubes for cracking hydrocarbons having a longitudinal array of pins having i) a maximum height from 0.5-1.3 cm; ii) a contact surface with the tube, having an area from 0.1%-10% of the tube external surface area iii) a uniform cross section along the length of the pin. (i.e. they are not tapered); and iv) a length to diameter ratio from 1.5:1 to 0.5:1 have an improved heat transfer over bare fins and reduced stress relative to a fined tube. | 08-27-2015 |
20150225492 | P-N-P LIGAND - A new P-N-P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium; and ii) an activator such as methylalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of high purity alpha olefins. In a preferred embodiment, the ligand of this invention enables a selective oligomerization in which the majority of the liquid product is a mixture of hexene and octene. The amount of by-product polymer that is produced in preferred oligomerization reactions is advantageously low. | 08-13-2015 |
20150203671 | BARRIER FILM FOR FOOD PACKAGING - Barrier films are prepared from a blend of two high density polyethylene blend components and a high performance organic nucleating agent. The two high density polyethylene blend components have substantially different melt indices. Large reductions in the moisture vapor transmission rate of the film are observed in the presence of the nucleating agent when the melt indices of the two blend components have a ratio of greater than 10/1. The resulting barrier films are suitable for the preparation of packaging for dry foods such as crackers and breakfast cereals. | 07-23-2015 |
20150175827 | POLYETHYLENE COMPOSITION FOR EXTRUSION COATING - A low density polyethylene (LDPE) made in a tubular reactor has improved stretch-ratio and melt strength properties after being blended with a small amount (1-25 weight percent of the blend) of a high density polyethylene (HDPE). The blends are useful as extrusion coating compositions. | 06-25-2015 |
20150141727 | INHERENTLY SAFE ODH OPERATION - In the operation of an oxidative dehydrogenation (ODH) process, it is desirable to remove oxygen in the product stream for a number of reasons, including to reduce oxidation of the product. This may be achieved by having several pre-reactors upstream of the main reactor having a catalyst system containing labile oxygen. The feed passes through one or more reactors saturated with labile oxygen. When the labile oxygen is consumed through a valve system, the pre-reactor accepts product from the main reactor and complexes reactive oxygen in the product stream until the catalyst system is saturated with labile oxygen. Then the reactor becomes a pre-reactor and another pre-reactor becomes a scavenger. | 05-21-2015 |
20150141579 | ENHANCED ESCR BIMODAL ROTOMOLDING RESIN - The present disclosure provides a resin suitable for use in rotational molding having an environmental stress crack resistance of greater than 1000 hours. The resin has a density from 0.937 to 0.942 g/cm | 05-21-2015 |
20150132593 | CURL RESISTANT BARRIER FILMS - Multilayer “barrier” films which have excellent Water Vapor Transmission Rate (WVTR) performance are prepared using a core layer which comprises a blend of from 92 to 60 weight % of nucleated HDPE and from 8 to 40 weight % LDPE. The films are suitable for the preparation of packages for dry foods such as crackers and breakfast cereals. | 05-14-2015 |
20150105509 | POLYETHYLENE ADDITIVE - A new additive for plastics (for example, polyethylene) is prepared by reacting a fatty acid ester of glycerol (such as glycerol monostearate) with a source of a reactive divalent metal selected from zinc, calcium, and magnesium. In an embodiment, Zinc oxide is the reactive divalent metal and the reaction is conducted in the presence of an acid such as zinc acetate. In one embodiment, a molar excess of zinc oxide (compared to the fatty acid ester) is used. The additive is suitable for use in the preparation of injection molded parts, rotomolded parts, and films. | 04-16-2015 |
20150099856 | MODIFIED PHOSPHINIMINE CATALYSTS FOR OLEFIN POLYMERIZATION - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 04-09-2015 |
20150094433 | MODIFIED PHOSPHINIMINE CATALYSTS FOR OLEFIN POLYMERIZATION - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 04-02-2015 |
20150094418 | POLYETHYLENE COMPOSITIONS AND CLOSURES FOR BOTTLES - A dual reactor solution process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have good processability, toughness, and environmental stress crack resistance combined with good organoleptic properties. The polyethylene compositions are suitable for compression molding or injection molding applications and are particularly useful in the manufacture of caps and closures for bottles. | 04-02-2015 |
20150065657 | ROTOMOLDING RESIN - Resins suitable for rotomolded articles comprise a bimodal polyethylene copolymer comprising from 0.1 to 5 weight % of one or more C | 03-05-2015 |
20150031914 | P-N-P LIGAND - A new P-N-P ligand is useful in ethylene oligomerizations. In combination with i) a source of chromium; and ii) an activator such as methylalumoxane; the ligand of this invention may be used to prepare an oligomer product that contains a mixture of high purity alpha olefins. In a preferred embodiment, the ligand of this invention enables a selective oligomerization in which the majority of the liquid product is a mixture of hexene and octene. The amount of by-product polymer that is produced in preferred oligomerization reactions is advantageously low. | 01-29-2015 |
20140378632 | MODIFIED PHOSPHINIMINE CATALYSTS FOR OLEFIN POLYMERIZATION - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 12-25-2014 |
20140374213 | PINNED FURNACE TUBES - Furnace tubes for cracking hydrocarbons that in an embodiment have a longitudinal array of pins having i) a maximum height from about 2 to about 4.8 cm; ii) a contact surface with the tube, having an area from about 0.1% to about 10% of the tube external cross section area iii) a uniform cross section along the length of the pin. (i.e., they are typically not tapered); and iv) a length to diameter ratio from about 4:1 to about 2:1 have an improved heat transfer over bare fins and reduced stress relative to a fined tube. | 12-25-2014 |
20140373484 | Corona Treated Polyethylene Films - A process for improving the sealing characteristics of corona treated polyolefin films through the use of a stabilizer system comprising i) 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethyl benzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione (CAS registry number 040601-76-1) and ii) an organic phosphite or phosphonite. | 12-25-2014 |
20140363599 | Adjusting Polymer Composition - A scavenger is used to indirectly control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising an inorganic chromium catalyst, and a group 4 single site catalyst. | 12-11-2014 |
20140357819 | MODIFIED PHOSPHINIMINE CATALYSTS FOR OLEFIN POLYMERIZATION - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 12-04-2014 |
20140357818 | MODIFIED PHOSPHINIMINE CATALYSTS FOR OLEFIN POLYMERIZATION - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 12-04-2014 |
20140357817 | MODIFIED PHOSPHINIMINE CATALYSTS FOR OLEFIN POLYMERIZATION - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 12-04-2014 |
20140336342 | CHROMIUM CATALYSTS FOR OLEFIN POLYMERIZATION - Mineral oil is added to a supported chromium catalyst in amounts which maintain a free flowing particulate material. Chromium catalysts so treated, provide polyethylene in a gas phase ethylene polymerization process with reduced reactor fouling or static. | 11-13-2014 |
20140332311 | NOISE SUPPRESSOR - In one embodiment of the invention, the noise of a supersonic jet of gas venting from a lower stack having a flow control means may be reduced by at least about 20 dBA by attaching an upper stack to the lower stack, said upper stack being packed with granulae to provide a bed height at least one diameter of the upper stack the cross section area of the interstitial voids between the granulae being at least about 2.25 times larger than the cross section area of the flow controlling means installed in the lower stack. The said bed is contained in the upper stack and kept in place by suitable upper and lower retainers such as, for example, a mesh or a perforated plate. | 11-13-2014 |
20140309351 | BARRIER PROPERTIES OF HDPE FILM - A composition comprising high density polyethylene (HDPE), calcium phthalate and a metal stearate is provided. Film that is prepared from this composition has excellent barrier properties—especially a low water vapor transmission rate (WVTR)—and is suitable for the preparation of packaging for dry foods such as crackers and cereals. | 10-16-2014 |
20140275426 | HINGE POLYMER - A polymer suitable for use in a thin film hinge (living hinge) comprising from about 0.1 to about 5 weight % of a C | 09-18-2014 |
20140275302 | POLYETHYLENE ADDITIVE - A new additive for plastics (for example, polyethylene) is prepared by reacting a fatty acid ester of glycerol (such as glycerol monostearate) with a source of a reactive divalent metal selected from zinc, calcium, and magnesium. In an embodiment, Zinc oxide is the reactive divalent metal and the reaction is conducted in the presence of an acid such as zinc acetate. In one embodiment, a molar excess of zinc oxide (compared to the fatty acid ester) is used. The additive is suitable for use in the preparation of injection molded parts, rotomolded parts, and films. | 09-18-2014 |
20140272366 | MULTILAYER FILMS - A multilayer film is prepared from a high impact strength polyethylene (HI polyethylene); a Ziegler Natta catalyzed polyethylene (Z/N polyethylene) and a high pressure low density polyethylene (LD polyethylene) with i) at least one skin layer consists essentially of HI polyethylene and ii) at least one core layer comprises a blend of Z/N polyethylene and said LD polyethylene. The HI polyethylene has a density of from 0.915 to about 0.930 g/cc and a normalized impact strength of at least about 300 g/mil. The amount of HI polyethylene is from about 30 to about 55 weight % (based on the combined weights of the HI+Z/N+LD polyethylenes). The films described herein are readily prepared on blown film equipment and provide an excellent balance of mechanical properties. | 09-18-2014 |
20140249339 | COMPLEX COMPRISING OXIDATIVE DEHYDROGENATION UNIT - Oxidative dehydrogenation of paraffins to olefins provides a lower energy route to produce olefins. Oxidative dehydrogenation processes may be integrated with a number of processes in a chemical plant such as polymerization processes, manufacture of glycols, and carboxylic acids and esters. Additionally, oxidative dehydrogenation processes can be integrated with the back end separation process of a conventional steam cracker to increase capacity at reduced cost. | 09-04-2014 |
20140205847 | MULTILAYER BLOWN FILMS - Coextruded multilayer blown films are produced comprising: a core layer comprising at least one random polypropylene copolymer; at least one skin or intermediate layer adjacent to said core layer; wherein the coextruded multilayer film has at least about 30% higher machine direction tear, at least about 30% improved tear ratio (machine direction tear divided by transverse direction tear) and at least about 10% lower film haze, relative to a similar multilayer film comprising at least one impact polypropylene copolymer in the core layer. | 07-24-2014 |
20140179873 | POLYETHYLENE BLEND COMPOSITIONS AND FILM - A polymer blend comprising first and second polyethylene copolymers is presented which has good processability, and which when made into film shows good toughness-stiffness balance, reasonable MD tear, as well as good optical properties. | 06-26-2014 |
20140178610 | TRANSFER LINE EXCHANGER - The present invention provides a transfer line exchanger which is optimized for one or more objective functions of interest such as pressure drop, erosion rate, fouling, coke deposition and operating costs. The transfer line exchanger is designed by computer modeling a transfer line exchanger in which the cross section of flow path is substantially circular and modeling the operation of the transfer line under industrial conditions to validate the model design and its operation. Then iteratively the model design is deformed and the operation of the deformed part is modeled and compared to values obtained with other deformed models until the value of the objective function is optimized (e.g. at an extreme) or the change in the objective function is approaching zero. | 06-26-2014 |
20140178256 | Serpentine Fluid Reactor Components - Some embodiments of the present invention provide components for a serpentine fluid reactor which is optimized for one or more objective functions of interest such as pressure drop, erosion rate, fouling, coke deposition and operating costs. The components are designed by computer modeling the components individually and collectively in which the cross section of flow path is substantially circular under industrial conditions to validate the model design and its operation. Then iteratively the component designs are deformed and the operation of the deformed part(s) is modeled and compared to values obtained with other deformed models until the value of the objective function is optimized (e.g. at an extreme) or the change in the objective function is approaching zero. | 06-26-2014 |
20140171582 | POLYETHYLENE COMPOSITIONS HAVING HIGH DIMENSIONAL STABILITY AND EXCELLENT PROCESSABILITY FOR CAPS AND CLOSURES - A dual reactor solution polymerization process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have high dimensional stability, excellent processability as well as good organoleptic properties and reasonable stress cracking resistance. The polyethylene compositions are suitable for compression molding or injection molding applications and are useful, for example, in the manufacture of caps and closures for bottles, and for example, in bottles containing non-pressurized liquids. | 06-19-2014 |
20140155568 | REDUCTION OF FOULING IN HIGH PRESSURE REACTORS - The Application of equations of state to experimental and literature data permits the formation of a model and phase diagram(s) that show under what conditions polyethylene is likely to precipitate out of a high pressure solution of polyethylene in supercritical ethylene. This then permits a better definition to run a high pressure reactor to reduce the likelihood of phase separation, loss of cooling and potentially decomposition of the reactor contents. | 06-05-2014 |
20140155561 | CONTROLLING RESIN PROPERTIES IN A GAS PHASE POLYMERIZATION PROCESS - Methods for dramatically altering the processability of ethylene copolymers made with a supported phosphinimine polymerization catalyst. The method involves changing the polymerization reactor temperature during the polymerization of ethylene and a least one alpha-olefin when a phosphinimine catalyst which comprises a substituted or unsubstituted indenyl ligand and a phosphinimine type ligand. | 06-05-2014 |
20140142360 | BULK ETHYLENE OLIGOMERIZATION USING A LOW CONCENTRATION OF CHROMIUM CATALYST AND THREE-PART ACTIVATOR - This invention enables the “bulk” oligomerization of ethylene (i.e. the oligomerization of ethylene in the presence of the oligomer product) using a catalyst system comprising 1) a very low concentration of a chromium catalyst and 2) a three part activator. The chromium catalyst contains a diphosphine ligand, preferably a so called P—N—P ligand. The activator includes an aluminoxane, trimethyl aluminum, and triethyl aluminum. | 05-22-2014 |
20140100343 | ETHYLENE COPOLYMER COMPOSITIONS, FILM AND POLYMERIZATION PROCESSES - Ethylene copolymers having a relatively high melt flow ratio and a multimodal profile in a temperature rising elution fractionation (TREF) plot are disclosed. The copolymers can be made into film having good dart impact values and good stiffness properties under decreased extruder pressures. | 04-10-2014 |
20140091088 | PLASTIC DUMPSTER - A unitary plastic container, which is optionally used for waste collection comprises a base, a front wall, a back wall and two opposing side walls, each wall extending upwardly from the base to define an open container top and an interior container volume. Each side wall has an outwardly extending sidewall portion which is outwardly offset relative to the rest of the container side wall. In each outwardly extending sidewall portion, an elongated cutout, indentation or channel is present. The elongated channel has a forward opening, a rearward opening and an elongated side opening extending from the forward opening to the rearward opening. The elongated channel lies within the interior container volume and divides the outwardly extending sidewall portion into two areas: an upper outwardly extending sidewall portion and a lower outwardly extending portion. The outwardly open elongate channel may be fitted with a reinforcing sleeve. | 04-03-2014 |
20140076209 | INDUSTRIAL FURNACE - The dry oxygen content in the exhaust of an industrial furnace may be controlled to | 03-20-2014 |
20140024789 | ADJUSTING POLYMER COMPOSITION - A scavenger is used to indirectly control the ratio of polymer components in a polyethylene composition made using a combination catalyst comprising an inorganic chromium catalyst, and a group 4 single site catalyst. | 01-23-2014 |
20130345377 | Ethylene Copolymers, Film and Polymerization Process - Ethylene copolymers having a relatively high melt flow ratio and a multimodal profile in a temperature rising elution fractionation (TREF) plot are disclosed. The copolymers can be made into film having good dart impact values and good stiffness properties under decreased extruder pressures. | 12-26-2013 |
20130310590 | Ligand Synthesis - Compounds 1,3,4-(SiMe | 11-21-2013 |
20130310532 | Rotomolding Resin - Resins suitable for rotomolded articles comprise a bimodal polyethylene copolymer comprising from 0.1 to 5 weight % of one or more C | 11-21-2013 |
20130296507 | REACTOR OPERABILITY IN A GAS PHASE POLYMERIZATION PROCESS - Olefin polymerization is carried out with a single site polymerization catalyst in the presence of a continuity additive. The continuity additive is a cocktail containing one or more dialkanolamide derived from a fatty acid, an oil soluble sulfonic acid and a dialkanolamine. | 11-07-2013 |
20130225743 | BARRIER FILM FOR FOOD PACKAGING - Barrier films are prepared from a blend of two high density polyethylene blend components and a high performance organic nucleating agent. The two high density polyethylene blend components have substantially different melt indices. Large reductions in the moisture vapor transmission rate of the film are observed in the presence of the nucleating agent when the melt indices of the two blend components have a ratio of greater than 10/1. The resulting barrier films are suitable for the preparation of packaging for dry foods such as crackers and breakfast cereals. | 08-29-2013 |
20130172500 | Passivated Supports for Use with Olefin Polymerization Catalysts - A phosphinimine catalyst immobilized on a passivated inorganic oxide support, had high activity at low co-catalyst concentrations and gave, under gas phase polymerization conditions, ethylene copolymer with a high molecular weight. A method of making a passivated silica support involves treatment of silica with an organoaluminum compound, a diorganomagnesium compound and a source of chloride (to make MgCl | 07-04-2013 |
20130090892 | Method of selecting a plastic - A plastic may be selected for a thin web application by finite element analysis of the part including the properties, including Poission's ratio of potential polymers from which the part may be made and subjecting the computer model of the part to loads to determine the deflection of the part under a specified series of loads or when the part breaks or subjecting the part to a number of use cycles to determine when the part fails. The process is iteratively repeated for each plastic and the results are compared to select a preferred plastic for the part. | 04-11-2013 |
20130072737 | Membrane-Supported Catalysts and the Process of Oxidative Dehydrogenation of Ethane Using the Same - The present invention provides a continuous process for the oxidative dehydrogenation of ethane to ethylene using a mixed oxide catalyst supported onto a ceramic membrane by supplying an oxygen containing gas (air or pure oxygen) and pure ethane to the opposite sides of the membrane, so that the paraffin and the oxygen do not directly mix in the reactor. | 03-21-2013 |
20130072632 | POLYETHYLENE COMPOSITIONS AND CLOSURES FOR BOTTLES - A dual reactor solution process gives high density polyethylene compositions containing a first ethylene copolymer and a second ethylene copolymer and which have good processability, toughness, and environmental stress crack resistance combined with good organoleptic properties. The polyethylene compositions are suitable for compression molding or injection molding applications and are particularly useful in the manufacture of caps and closures for bottles. | 03-21-2013 |
20130053524 | Feeding Highly Active Phosphinimine Catalysts to a Gas phase reactor - A highly active, supported phosphinimine catalyst is fed to a gas phase reactor as a slurry in a liquid hydrocarbon. Feeding the catalyst to a gas phase reactor in a viscous liquid hydrocarbon modifies catalyst initiation kinetics. | 02-28-2013 |
20130022498 | Roller detection - In the high pressure of polymerization of ethylene homopolymer or copolymers conditions in the reactor may become unstable leading to the decomposition (“decomp”) of the reaction mixture. Monitoring temperature excursions traveling through the reactor over close thermocouples (a roller) to detect changes in the mean temperature and the moving temperature front for a group of thermocouples detects conditions potentially leading to a decomp. | 01-24-2013 |
20130012672 | CATALYST FOR HIGH TEMPERATURE OLEFIN POLYMERIZATION - An olefin polymerization catalyst is prepared by (a) in a diluent, combining a diorganomagnesium compound with less than 2 molar equivalents of a first source of chloride to produce a “chloride deficient” magnesium chloride support; (b) without isolating any solids, adding a second source of chloride which reduces the amount of soluble un-reacted diorganomagnesium compound present; (c) without isolating any solids present, adding a tetravalent titanium species and; (d) adding an activator. The catalyst is active for solution polymerization of olefins. | 01-10-2013 |
20120316297 | Modified phosphinimine catalysts for olefin polymerization - Olefin polymerization is carried out with a supported phosphinimine catalyst which has been treated with a long chain substituted amine compound. | 12-13-2012 |
20120302707 | CHROMIUM CATALYSTS FOR OLEFIN POLYMERIZATION - Mineral oil is added to a supported chromium catalyst in amounts which maintain a free flowing particulate material. Chromium catalysts so treated, provide polyethylene in a gas phase ethylene polymerization process with reduced reactor fouling or static. | 11-29-2012 |
20120275966 | Furnace Coil with Protuberances on the External Surface - The efficiency of heat transfer to a furnace tube or coil in a furnace for cracking ethane, propane or naphtha feedstocks, or a mixture thereof may be improved by providing protuberances on the surface of the tube or coil having i) a maximum height from 3 to 15% of the coil outer diameter, ii) a contact surface with a coil, or a base, which area is 0.1%-10% of the coil external cross section area, and iii) a geometrical shape which has a relatively large external surface containing a relatively small volume. | 11-01-2012 |
20120271087 | Activation for Oligomerization - The oligomerization of ethylene using a chromium catalyst and an aluminoxane activator is well known. The undesired formation of polyethylene as a by-product is also known to occur during prior oligomerization processes. We have discovered that the use of an aluminoxane that is prepared by non-hydrolytic means provides a highly productive activator (co-catalyst) for ethylene oligomerization and mitigates the undesired formation of by-product polyethylene. | 10-25-2012 |
20120259081 | REACTOR CONTINUITY - A supported catalyst system comprising a phosphinimine ligand containing catalyst on a porous inorganic support treated with a metal salt has improved reactor continuity in a dispersed phase reaction in terms of initial activation and subsequent deactivation. The resulting catalyst has a lower consumption of ethylene during initiation and a lower rate of deactivation. Preferably the catalyst is used with an antistatic agent. | 10-11-2012 |
20120259080 | REACTOR CONTINUITY - A supported catalyst system comprising a phosphinimine ligand containing catalyst on an alumina support treated with a metal salt has improved reactor continuity in a dispersed phase reaction in terms of initial activation and subsequent deactivation. The resulting catalyst has a lower consumption of ethylene during initiation and a lower rate of deactivation. Preferably the catalyst is used with an antistatic agent. | 10-11-2012 |
20120259070 | REACTOR CONTINUITY - A dual catalyst system comprising a phosphinimine ligand containing catalyst and phenoxide ligand (preferably a salicylaldimine) on a support treated with a metal salt has improved reactor continuity in a dispersed phase reaction in terms of initial activation and subsequent deactivation The resulting catalyst has a lower consumption of ethylene during initiation and a lower rate of deactivation. Preferably the catalyst is used with an antistatic agent. | 10-11-2012 |
20120251407 | FURNACE COIL FINS - The present invention provides low profile, thick (“stubby”) longitudinal fins having a cross section which is a parallelogram, trapezoid or a triangle extending from 10% to 100% of a coil pass and comprising from 3 to 45 weight % of a coil in a radiant section of a furnace for thermally cracking one or more of paraffins and naphtha. The fins provide an additional surface through which heat may be transferred to the coil making the coil more efficient reducing greenhouse emissions. | 10-04-2012 |
20120238720 | POLYETHYLENE FILM - Polyethylene films having a good balance of optical and mechanical properties are disclosed. The films are derived from ethylene copolymer compositions made with a suitably substituted phosphinimine catalyst. The ethylene copolymers have very narrow molecular weight distributions and broadened comonomer distributions. | 09-20-2012 |
20120016171 | SUPPORTED OXIDATIVE DEHYDROGENATION CATALYST - The present invention provides a process for the manufacture of an efficient and robust catalyst for the oxidative dehydrogenation of paraffins to olefins, preferably lower C | 01-19-2012 |
20110036853 | CONTAINER ASSEMBLY HAVING REMOVABLE EXTERIOR SHELF STRUCTURES - A container assembly ( | 02-17-2011 |
20100219096 | CONTAINER ASSEMBLY - The present invention relates to a container assembly ( | 09-02-2010 |
20080248228 | PRODUCE PACKAGING - Disclosed is a produce package made from a gas permeable, non-perforated polyethylene film. The polyethylene film is made from a blend of a linear low density polyethylene and a high pressure low density polyethylene. The film has an absolute oxygen transmission rate that is greater than the weighted average of the absolute oxygen transmissions rates for film made from each blend component. Disclosed are polyethylene blends having densities above 0.910 g/cc that can be made into films with absolute oxygen transmission rates greater than 550 ccO | 10-09-2008 |