Class / Patent application number | Description | Number of patent applications / Date published |
526130000 | Silicon present in inorganic oxygen-containing compound | 37 |
20090018291 | METHOD OF REGENERATION OF TITANIUM-CONTAINING MOLECULAR SIEVE CATALYST - Disclosed herein is a method of regenerating a titanium-containing molecular sieve catalyst. Particularly, this invention provides a method of regenerating a titanium-containing molecular sieve catalyst used in epoxidation of olefin through simple treatment using a mixture solvent comprising aqueous hydrogen peroxide and alcohol. According to the method of this invention, when the catalyst having decreased activity is regenerated, the activity of the regenerated catalyst is equal to that of new catalyst and can be maintained stable for a long period of time. | 01-15-2009 |
20090131614 | Supported Polymerisation Catalysts - A supported polymerisation catalyst system comprises: (a) a polymerisation catalyst, (b) a cocatalyst, and (c) a porous support, and is characterised in that the porous support has been pretreated with (i) a chemical dehydration agent and (ii) a hydroxy compound wherein the hydroxy compound is not a cocatalyst or component thereof. The preferred polymerisation catalyst is a transition metal compound for example a metallocene and by use of the supported catalyst systems improved activity may be achieved. | 05-21-2009 |
20090156761 | Fluorinated transition metal catalysts and formation thereof - Supported catalyst systems and methods of forming the same are described herein. In one specific embodiment, the methods generally include providing an inorganic support material and contacting the inorganic support material with an aluminum fluoride compound represented by the formula AlF | 06-18-2009 |
20090163681 | Fast Activating Catalyst - A method of preparing a catalyst comprising aging a silica support in an alkaline solution to produce an alkaline aged silica support, removing at least a portion of the alkaline solution from the alkaline aged silica support to produce a dried silica support, and activating the silica support to produce a catalyst composition, wherein alkaline aging lowers the surface area of the silica support to less than about 50% of the original value and wherein activation of the silica support is carried out in batches of equal to or greater than about 500 lbs for a time period of less than about 8 hours. A method of preparing a polymer comprising alkaline aging a silica support material, adding chromium to the silica support material prior to the alkaline aging, after the alkaline aging, or both to form a chromium-silica support, rapidly activating the chromium-silica support produce an activated olefin polymerization catalyst, contacting the activated olefin polymerization catalyst with at least one monomer in a reaction zone under conditions suitable to produce a polymer, and recovering the polymer. | 06-25-2009 |
20090215972 | Polymerisation Catalysts - A process for the polymerisation of ethylene or the copolymerisation of ethylene and alpha-olefins in the presence of a catalyst system comprising—as components (a) a transition metal compound, (b) a non-aluminoxane activator, and (c) optionally a support, comprises the use of a prepolymer prepared by contact of the catalyst components with ethylene and/or one of more alpha-olefins at a temperature in the range 60° C. to 100° C. The prepolymer may be isolated or used in situ for the polymerisation of ethylene or the copolymerisation of ethylene and alpha-olefins in particular 1-hexene. By use of the process thermal stability of the catalyst is improved leading to increased activity without any deterioration in polymer morphology. | 08-27-2009 |
20090240010 | ALUMINA-SILICA ACTIVATOR-SUPPORTS FOR METALLOCENE CATALYST COMPOSITIONS - The present invention provides activator-supports containing alumina-silica compounds with high levels of alumina, and polymerization catalyst compositions employing these activator-supports. Methods for making these activator-supports based on alumina-silica and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided. | 09-24-2009 |
20090275713 | Method for promoting Michael addition reactions - Homogeneously dispersed solid reaction promoters having an average particle size from 0.01 μm to 500 μm are disclosed for preparing curable mixtures of at least one Michael donor and at least one Michael acceptor. The resulting curable mixtures are useful as coatings, adhesives, sealants and elastomers. | 11-05-2009 |
20090312508 | CATALYST FOR THE PRODUCTION OF POLYESTER, USE OF THE CATALYST FOR THE PRODUCTION OF POLYESTER, AND POLYESTER OBTAINED BY THE USE OF THE CATALYST - The present invention relates to a catalytically active composition that can be used for the production of polyesters. According to the invention, good polyester products can be obtained in this way without having to use antimony components. | 12-17-2009 |
20090326174 | CLAY ACTIVATION OF PD(II) AND NI(II) COMPLEXES - A clay-supported complex that includes a metal complex containing a phosphinobenzenesulfonate ligand coordinated to Pd(II) or Ni(II), and a clay combined with the metal complex. The metal complex can be neutral or charged. The clay-supported complex is active in the homopolymerization and copolymerization of olefins, including polarized and non-polarized alpha-olefins. | 12-31-2009 |
20100069587 | METHOD FOR PREPARING COPOLYMERS - A method for the preparation of copolymers of ethylene and α-olefins having a fraction (%) of the molecular weight component of >1,000,000 of less than 6% comprises polymerising ethylene and an α-olefin in the presence of a supported polymerisation catalyst system comprising (a) a transition metal compound (b) a porous support material, and (c) an activator characterized in that the support material has been (i) dried at a temperature in the range 0° C. to 195° C. in an inert atmosphere, and (ii) treated with an organometallic compound. The resultant supported catalyst systems show improved productivity and allow for control of the resultant polymer properties. Particularly preferred supported catalyst systems are those comprising metallocene complexes. | 03-18-2010 |
20100076167 | SILICA-COATED ALUMINA ACTIVATOR-SUPPORTS FOR METALLOCENE CATALYST COMPOSITIONS - Silica-coated alumina activator-supports, and catalyst compositions containing these activator-supports, are disclosed. Methods also are provided for preparing silica-coated alumina activator-supports, for preparing catalyst compositions, and for using the catalyst compositions to polymerize olefins. | 03-25-2010 |
20100137532 | CATALYST TO POLYMERIZE OLEFINS AND CONJUGATED DIENES IN HETEROGENEOUS PHASE, PROCESS FOR OBTAINING AND USING THE SAME - The invention relates to a catalyst for the heterogeneous phase polymerisation of conjugated dienes and olefins, comprising a pre-catalyst consisting of a mixture of metallocene hydride-aluminohydride compounds: (CpR | 06-03-2010 |
20100222529 | Homo- or Co-polymers of Ethylene with Combination of Processability and Toughness Properties - The present invention discloses a homo- or co-polymer of ethylene characterised in that it combines the properties of:
| 09-02-2010 |
20110060111 | Production of Polyethylene - The present invention is directed to the use of aluminum alkyl activators and co-catalysts to improve the performance of chromium-based catalysts. The aluminum alkyls allow for the variable control of polymer molecular weight, control of side branching while possessing desirable productivities, and may be applied to the catalyst directly or separately to the reactor. Adding the alkyl aluminum compound directly to the reactor (in-situ) eliminates induction times. | 03-10-2011 |
20110065874 | HALF-METALLOCENE CATALYST COMPOSITIONS AND THEIR POLYMER PRODUCTS - The present invention provides polymerization catalyst compositions employing half-metallocene compounds with a heteroatom-containing ligand bound to the transition metal. Methods for making these hybrid metallocene compounds and for using such compounds in catalyst compositions for the polymerization and copolymerization of olefins are also provided. | 03-17-2011 |
20110130531 | Methods for Polymerization Using Spray Dried and Slurried Catalyst - Methods for gas phase olefin polymerization are provided. The method can include combining a spray dried catalyst system with a diluent to produce a catalyst slurry. The catalyst system can include a metallocene compound. Ethylene, a continuity additive, and the catalyst slurry can be introduced to a gas phase fluidized bed reactor. The reactor can be operated at conditions sufficient to produce a polyethylene. The spray dried catalyst system can have a catalyst productivity of at least 12,000 grams polyethylene per gram of the catalyst system. | 06-02-2011 |
20110218309 | Preparation of ultra high molecular mass polyethylene and ultra high molecular mass polyethylene having improved crosslink ability prepared thereb - The invention pertains to a method for the preparation of ultra high molecular mass polyethylene by polymerization in suspension or in gas phase in the presence of a chromium catalyst sitting on an alumosilicate support material. The chromium catalyst has been subjected to a fluorinating treatment and the polymerization is performed under low temperature conditions within a temperature range of from 50 to 100° C. The invention pertains also to ultra high molecular mass polyethylene prepared by that method and having a density in the range of from 0.930 to 0.950 g/cm | 09-08-2011 |
20120010378 | Catalyst Precursor Particles, Their Preparation and Use - A method for preparing a catalyst precursor for an olefin polymerization catalyst involves the use of aqueous or alcoholic solutions of a chromium salt and of boric acid and aluminium carboxylate for deposition onto an inorganic support material, such as a silica xerogel. The chromium salt, aluminium carboxylate and boric acid are sufficiently soluble for deposition from a single solution to be effective. The catalyst precursor can be activated by calcination to form a catalyst for homo- or co-polymerisation of α-olefins which has productivity and melt flow index for the resulting polymer or copolymer which is comparable to results obtained with catalysts prepared by prior art organometallic routes. The activation of the catalyst precursor gives reduced levels of toxic or noxious fumes during activation compared to use of organometallic sources of chromium or aluminium. | 01-12-2012 |
20120022224 | Particles Including Zeolite Catalysts And Their Use In Oligomerization Processes - Embodiments of an invention disclosed herein relate to particles made from zeolite catalysts and their use in oligomerization processes. In particular, shaped particles (for example, spheroid particles) are made from compositions including the contact product of at least one zeolite catalyst and at least one binder. | 01-26-2012 |
20120095174 | Fluorinated Catalyst Systems and Methods of Forming the Same - Supported catalyst systems and methods of forming the same are described herein. In one specific embodiment, the methods generally include providing an inorganic support material and contacting the inorganic support material with an aluminum fluoride compound represented by the formula AlF | 04-19-2012 |
20120101240 | PREPARATION OF PRECIPITATED ZN PP CATALYSTS WITH INTERNAL PORE STRUCTURE USING NANOPARTICLES - Process for the preparation of a catalyst being in the form of solid particles comprising the steps of preparing a solution of a complex of a metal which is selected from one of the groups 1 to 3 of the periodic table (IUPAC) and an electron donor by reacting a compound of said metal with said electron donor in an organic liquid reaction medium; adding to said solution solid material obtaining a suspension, said solid material does not comprise catalytically active sites, has a specific surface area below 500 m | 04-26-2012 |
20120309914 | Fluorinated Impregnated Catalyst Systems and Methods of Forming the Same - Methods of forming supported catalyst systems, supported catalyst systems and polymerization processes utilizing supported catalyst systems are described. The methods include providing an inorganic support material, contacting the inorganic support material with a support solvent to form a support solution, and contacting the support solution with a fluorine containing compound (AlF | 12-06-2012 |
20130072649 | PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT POLYETHYLENE - In a process for producing high molecular weight polyethylene, ethylene is contacted with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand under polymerization conditions comprising a temperature of about 20° C. to less than 90° C. and a pressure of about 4 bar to about 40 bar. | 03-21-2013 |
20130085245 | Methods for Reducing Static Charge of a Catalyst and Methods for Using the Catalyst to Produce Polyolefins - Catalysts and methods for making and using the same are provided. The method for fabricating a catalyst may includes contacting a supported catalyst with a monomer under conditions that reduce an overall charge of the catalyst to less than about 75% of an initial charge of the catalyst. A method for polymerization may include introducing a pre-polymerized catalyst and one or more olefins into a gas phase fluidized bed reactor, operating the reactor at conditions sufficient to produce a polyolefin, wherein the polymerization is carried out in the substantial absence of any continuity additives. | 04-04-2013 |
20130172499 | PROCESS FOR THE PREPARATION OF OLEFIN POLYMERS IN THE PRESENCE OF CHROMIUM CATALYSTS - A process for the polymerization of olefin carried out in the presence of a Cr-oxide supported catalyst and a cocatalyst the improvement comprising polymerizing in the presence of an effective amount of hydrogen thereby obtaining an increased catalyst activity. | 07-04-2013 |
20130345376 | Aluminoxane Catalyst Activators Containing Carbocation Agents, and use thereof in Polyolefin Catalysts - This invention relates to an activator composition comprising (i) an organoaluminum compounds; (ii) a carbocation compound of the formula R | 12-26-2013 |
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 |
20140200317 | Methods for Reducing Static Charge of a Catalyst and Methods for Using the Catalyst to Produce Polyolefins - Catalysts and methods for making and using the same are provided. The method for fabricating a catalyst may includes contacting a supported catalyst with a monomer under conditions that reduce an overall charge of the catalyst to less than about 75% of an initial charge of the catalyst. A method for polymerization may include introducing a pre-polymerized catalyst and one or more olefins into a gas phase fluidized bed reactor, operating the reactor at conditions sufficient to produce a polyolefin, wherein the polymerization is carried out in the substantial absence of any continuity additives. | 07-17-2014 |
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 |
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 |
20150018503 | Methods for Producing Fluorided-Chlorided Silica-Coated Alumina Activator-Supports and Catalyst Systems Containing the Same - Methods for the preparation of fluorided-chlorided silica-coated alumina activator-supports are disclosed. These activator-supports can be used in catalyst systems for the production of olefin-based polymers, such as polyethylene and polypropylene. | 01-15-2015 |
20150080541 | CATALYST FOR THE POLYMERISATION OF OLEFINS, PROCESS FOR ITS PRODUCTION AND USE - The present invention provides a new process for preparing a catalyst for the gas phase polymerization of olefins wherein the sequence of addition of the catalyst components and the selection of the said components provides a catalyst composition which exhibits a superior response to hydrogen, a surprisingly high productivity and an improved activity profile. The catalyst consists of compounds of a group IV transition metal, Mg, C1 and A1 supported on a silica support. | 03-19-2015 |
20150119540 | Novel Aluminum Alkyl With C5 Cyclic and Pendent Olefin Polymerization Catalyst - This invention relates to organoaluminum compounds, to organoaluminum activator systems, preferably supported, to polymerization catalyst systems containing these activator systems and to polymerization processes utilizing the same. In particular, this invention relates to catalyst systems comprising an ion-exchange layered silicate, an organoaluminum compound, and a metallocene. | 04-30-2015 |
20160032025 | LIGANDS FOR CATALYSTS - Catalyst systems and methods for making and using the same. A catalyst system can include a non-metallocene catalyst having the structure: wherein M is a group 4 element, each of R | 02-04-2016 |
20160168283 | CHROMIUM(III) SILICATE CATALYSTS SUITABLE FOR PE SYNTHESIS | 06-16-2016 |
20170233510 | Silica-Coated Alumina Activator-Supports For Metallocene Catalyst Compositions | 08-17-2017 |
20190144572 | Methods for Restoring Metallocene Solids Exposed to Air | 05-16-2019 |