| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 526067000 | REMOVING AND RECYCLING REMOVED MATERIAL FROM AN ONGOING POLYMERIZATION ZONE TO A POLYMERIZATION ZONE | 49 |
| 20080255325 | Process for the Continuous Preparation and Isolation of Soluble Preceramic Oligomers and/or Polymers - The invention relates to a method for continuously producing pre-ceramic polymers. The inventive method consists in synthesising polymers, in separating polymers from a reaction mixture and in thermally conditioning for defining a cross linkage degree and Theological properties, wherein all said steps are integrated into a single method. The thus obtainable polymers are used in the form of an initial material for producing non-oxidised ceramics in ternary X/Y/N or X/Y/N/C quaternary systems. Said materials are characterized by the high mechanical, thermal and chemical resistance thereof, wherein any X and Y combination can represent in particular Si, B, P, Al, Ti, V, Zr, Ta elements. | 10-16-2008 |
| 20080262172 | EFFICIENT BIOMOLECULE RECYCLING METHOD AND SYSTEM - A technique is disclosed for recapturing and recycling biomolecule reagents. The technique may be applied in a range of settings, including biopolymer synthesis, sequencing, and so forth. Biomolecule reagents such as nucleotides and oligonucleotides used to process nucleic acids, which may be marked with fluorescent tags, carry blocking agents, and so forth, are introduced to samples in a sample container. After the desired reaction occurs with some of the biomolecule reagents, such as some of the nucleotides or oligonucleotides, the effluent stream is processed to recapture unreacted biomolecule reagents. These may be separated from other reaction components, and recycled into the same or a different sample container. The recaptured biomolecule reagents may be mixed with additional biomolecule reagents prior to reintroduction to the same or different samples. | 10-23-2008 |
| 20090105429 | PROCESS FOR THE PREPARATION OF AN OLEFIN - Process for the preparation of an olefin comprising reacting an oxygenate feed and an olefinic co-feed in a reactor in the presence of a zeolite to obtain a reaction product containing one or more olefins; wherein the olefinic co-feed is at least partially obtained ex-situ during a first phase and at least partially obtained in-situ during a subsequent second phase. | 04-23-2009 |
| 20090118444 | Process for the polymerisation of vinyl-containing monomers - The invention relates to a process for the polymerisation of monomeric vinyl halides in a polymerisation reactor, especially using a reflux condenser, and also to a polymerisation reactor for carrying out the process according to the invention. As a result, the space-time yield (STY) of an exothermal reaction can be substantially improved whilst the product quality remains almost the same. | 05-07-2009 |
| 20100105849 | SYSTEMS AND METHODS FOR FABRICATING POLYOLEFINS - Various methods and systems for using oxygen in a polyolefin polymerization reactor system are provided. In certain embodiments, the methods are performed in conjunction with a polymerization reactor system such as a gas-phase reactor system. | 04-29-2010 |
| 20100121002 | POLYMERISATION PROCESS - An olefin polymerisation process is disclosed in which a slurry of olefin polymer is produced within a polymerisation zone, and a polymer slurry stream is withdrawn from the polymerisation zone and passed through a transfer line to a centrifugal concentrating device, which separates it into a solids-lean stream or streams each having a solids concentration less than that of the polymer slurry stream entering the concentrating device and a solids-rich stream or streams each having a solids concentration greater than that of the polymer slurry stream entering the concentrating device, wherein at least part of the solids-rich stream or streams is recycled back into the polymer slurry stream upstream of the concentrating device and downstream of the polymerisation zone. | 05-13-2010 |
| 20100267905 | COPOLYETHER GLYCOL MANUFACTURING PROCESS - The present invention provides a process for manufacturing copolyether glycol having a mean molecular weight of from about 650 to about 5000 dalton by polymerization of tetrahydrofuran and at least one alkylene oxide in the presence of an acid catalyst and at least one compound containing reactive hydrogen atoms. More particularly, the invention relates to a process for manufacturing copolyether glycol which comprises recycle to the polymerization reaction step of at least a portion of the oligomeric cyclic ether which is co-produced with the copolyether glycol. | 10-21-2010 |
| 20100280195 | PROCESS FOR PREPARING POLYOXYMETHYLENE HOMOPOLYMERS OR COPOLYMERS BY HOMOPOLYMERIZATION OR COPOLYMERIZATION OF TRIOXANE, STARTING FROM METHANOL - A process for preparing polyoxymethylene homopolymers or copolymers ( | 11-04-2010 |
| 20120116029 | METHOD FOR POLYMERIZING POLYPROPYLENE - The present disclosure relates to a method for polymerizing polypropylene, optionally with one or more additional comonomers in a gas phase reactor in the presence of a mixed electron donor system comprising at least one selectivity control agent and at least one activity limiting agent. The process involves controlling the polymerization process to ensure that the difference between the reactor temperature and the dew point temperature of the incoming monomer stream is 12° C. or greater. | 05-10-2012 |
| 20120116030 | PROCESS FOR CONTINUOUSLY PRODUCING THERMOPLASTICALLY PROCESSABLE POLYURETHANES - The invention relates to a process for continuously producing thermoplastically processable polyurethanes in a recycle reactor with flexibly adjustable mixing conditions. | 05-10-2012 |
| 20120289666 | PROCESS FOR THE GAS PHASE POLYMERISATION OF OLEFINS - The present invention relates to a process for the gas phase polymerisation of olefins, and, in particular, to a process for the gas phase polymerisation of olefins with recycle of fines to the reaction zone. | 11-15-2012 |
| 526068000 | Recycling monomer | 28 |
| 20080214747 | Use of an Additive For Improving the Flowability of Fines and Their Reintroduction Into a Continuous Gas-Phase (Co-) Polymerisation of Olefins Reactor - The present invention relates to the use of an additive for improving the flowability of fines and their reintroduction into a process for the continuous gas-phase (co-) polymerisation of olefins in a fluidized bed or sub-fluidized bed reactor. | 09-04-2008 |
| 20080214748 | Method for Removing Residual Monomers from Polyoxymethylenes - Process for removing unconverted residual monomers from polyoxymethylenes, wherein a devolatilization step is carried out in an extrudate devolatilizer. | 09-04-2008 |
| 20080234446 | PROCESS FOR TRANSPORTING IN THE TANK OF A TANK TRUCK OR TANKER SHIP A LIQUID MONOMER PHASE WITHDRAWN FROM A STORAGE VESSEL - A process for transporting a liquid monomer phase which has been withdrawn from a storage vessel and comprises methacrylic monomers to an extent of ≧90% by weight, in a tank truck or in a tanker ship, in which the liquid monomer phase is subjected to a separating operation on the route from the storage vessel into the tank of a tank truck or of a tanker ship in order to separate polymer of the monomer present in dissolved form in the liquid monomer phase. | 09-25-2008 |
| 20080269433 | Process for the Carbonylation of a Conjugated Diene - A process for the carbonylation of a conjugated diene to an ethylenically unsaturated acid, comprising the steps of (a) contacting a conjugated diene with carbon monoxide and water in the presence of a catalyst system including a source of palladium, a source of an anion and a bidentate phosphine ligand, to obtain a mixture comprising an ethylenically unsaturated acid and a reversible diene adduct comprising alkenyl ester of the conjugated diene with the ethylenically unsaturated acid; (b) separating the obtained reaction mixture into a gaseous stream comprising unreacted conjugated diene and carbon monoxide, a first liquid product stream comprising at least part of the ethylenically unsaturated acid and the reversible diene adducts, and a second liquid stream comprising the catalyst system in admixture with the ethylenically unsaturated acid; (c) separating the first liquid product stream obtained in step (b) into a stream comprising the ethylenically unsaturated acid and a stream comprising the reversible diene adducts; and (d) recycling the stream comprising the reversible diene adducts to step (a), or converting the reversible diene adducts back to the conjugated diene and the ethylenically unsaturated acid and recycling the thus obtained conjugated diene to step (a). | 10-30-2008 |
| 20080269434 | Recovering Ethylene and Vinyl Acetate from the Residual Gas Stream of Vinyl Ester-Ethylene Copolymer Preparation - In a process for the preparation of copolymers containing vinyl esters and ethylene or ethylenically unsaturated monomers by aqueous, free radical polymerization at a pressure of from 5 to 100 bar absolute by the emulsion or suspension polymerization method, after the end of the polymerization, the reaction mixture is let down to a pressure of from 0.1 to 5 bar absolute and recovery of unconverted monomers is effected by multistage fractional low-temperature condensation from the residual gas. | 10-30-2008 |
| 20080281057 | Process For the Polymerisation of Vinyl-Containing Monomers - The invention relates to a process for the polymerisation of monomeric vinyl halides in a polymerisation reactor, especially using a flow-through cooler, and also to a polymerisation reactor for carrying out the process according to the invention. As a result, the space-time yield (STY) of an exothermal reaction can be substantially improved whilst the product quality remains almost the same. | 11-13-2008 |
| 20080287615 | Polymerization Process - The present invention relates to a gas phase process for polymerizing one or more hydrocarbon monomer(s) in the presence of a catalyst system and a fluorinated hydrocarbon, where the fluorinated hydrocarbon is present at a partial pressure of 6.9 to 348 kPa in the reactor and the reactor temperature is from 30 to 120° C. | 11-20-2008 |
| 20090030164 | Polymerisation control process - The present invention relates to a process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation. | 01-29-2009 |
| 20090111954 | POLYMER PRODUCING METHOD AND APPARATUS AND POLYMER DEGASSING METHOD AND APPARATUS - The polymer degassing apparatus includes a barrel-shaped horizontal container | 04-30-2009 |
| 20090247714 | PROCESS AND PLANT FOR OLIGOMERIZATION/POLYMERIZATION OF ETHYLENE AND/OR ALPHAOLEFINS - The present invention relates to a process for oligomerization/polymerization of ethylene and/or alpha-olefins, comprising the steps of oligomerizing/polymerizing ethylene and/or alpha-olefins to produce a reaction product which contains undesired reaction by-products, separating the reaction by-product from the reaction product as one or more reaction by-product fractions, and subjecting at least one of the reaction by-product fractions to steam cracking to produce a steam cracking product which comprises ethylene, which may be optionally purified and feed to the oligomerization/polymerization of ethylene and/or alpha olefins step. | 10-01-2009 |
| 20090259005 | Monomer/solvent separation and recycle process for propylene containing polymers - Monomer/solvent separation and recycle processes for continuous supercritical, solution and advanced solution polymerization processes for propylene-containing polymers and their blends are provided. The advantageous monomer/solvent separation and recycle process includes heating a polymer-lean recycle stream coming from a gravimetric separator positioned downstream of the reactor to form a heated polymer-lean recycle stream, and subsequently combining the heated polymer-lean recycle stream with the one or more homogenous reactor effluent streams to form a heated reactor effluent mixed stream. The heated reactor effluent mixed stream may then be passed through a pressure let-down valve followed and a gravimetric separator, such as to provide for reduced fouling propensity of the polymer-rich phase and sufficient heating of the polymer-rich phase to be able to pass through the remainder of the processing steps to form a propylene based polymer product without additional heat. | 10-15-2009 |
| 20090306312 | Method for Preparing Linear Alpha-Olefins With Improved Heat Removal - The present invention relates to a method for preparing linear alpha-olefins by oligomerizing of ethylene in the presence of a first organic solvent and a homogenous catalyst in a reactor, characterized in that the reactor overhead is cooled by means of a refrigerant. | 12-10-2009 |
| 20100076165 | EQUIPMENT AND METHOD FOR PRODUCING POLYHYDROXYCARBOXYLIC ACID - This invention provides an equipment and a method for producing polyhydroxycarboxylic acid whereby the yield of a starting material in the process can be improved. | 03-25-2010 |
| 20100168347 | Processes Using Dividing Wall Distillation Column - A method for the separation of hydrocarbon compounds utilizing a dividing wall distillation column is described. The dividing wall distillation column enables one or more side draw stream to be removed from the dividing wall distillation column in addition to an overhead stream and a bottoms stream. | 07-01-2010 |
| 20100190935 | Process and Apparatus for Olefin Polymerization in a Fluidized Bed Reactor - A process and apparatus for gas phase polymerization of olefins in a fluidized bed reactor are disclosed. The process and apparatus employ a vertically oriented fines ejector in order to reduce fouling and reactor downtime. | 07-29-2010 |
| 20100240843 | PURGING DEVICES FOR USE IN POLYMERIZATION PROCESSES - One or more purging devices are provided which prevent buildup of polymer particles on valves used in the production of polyolefins. More particularly, embodiments of the present invention relate to purge devices which direct continuous gas flow onto the face of a ball valve located in a recycle stream to prevent resin buildup. Further embodiments of the present invention relate to polyolefin production processes employing such purging devices. | 09-23-2010 |
| 20110046323 | Process for Monomer Recovery From a Polymerization Process - The present relates to a process for optimizing the recovery of unreacted monomers from a polymerization process, wherein said process comprises the steps of
| 02-24-2011 |
| 20110152476 | Removal of catalyst and/or cocatalyst residues in a polyolefin manufacturing process - The invention relates to an improved process for the manufacture of an olefin polymer composition in which corrosive trace cocatalyst and catalyst residues are removed from the hydrocarbon gas recycle stream prior to compression and re-use in the polymerization zone(s). | 06-23-2011 |
| 20110313115 | PHASE SEPARATOR AND MONOMER RECYCLE FOR SUPERCRITICAL POLYMERIZATION PROCESS - This invention relates to a process for polymerizing olefins, comprising the steps of: | 12-22-2011 |
| 20120157639 | METHOD FOR MAKING POLYCARBONATE - A method of making polycarbonate comprises polymerizing, in a melt polymerization reaction, an aromatic dihydroxy compound and a diaryl carbonate in a presence of a polymerization catalyst and producing a by-product vapor stream comprising the dihydroxy compound, the diaryl carbonate and a diaryl carbonate by-product, adding a low vapor pressure compound to the by-product vapor stream to produce a modified by-product vapor stream, introducing the modified by-product vapor stream to a separation unit, removing the volatile diaryl carbonate by-product from the modified by-product vapor stream in the separation unit to form a treated by-product stream and returning the treated by-product stream to the polymerization reaction. Alternatively, the low vapor pressure compound can be added directly to the separation unit. | 06-21-2012 |
| 20120232232 | Ethylene Recovery by Absorption - A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene. | 09-13-2012 |
| 20130274425 | Methods To Increase Oligomer Viscosity And Uses Thereof - This invention relates to processes for increasing the viscosity of an oligomer composition including contacting the oligomer composition comprising one or more vinyl terminated oligomer with a supported mixed metal oxide catalyst; wherein the contacting causes the reaction of the vinyl terminated oligomers; and producing a product oligomer composition having a higher viscosity than the oligomer composition. | 10-17-2013 |
| 20140094575 | Process for Monomer Recovery From a Polymerization Process - The present relates to a process for optimizing the recovery of unreacted monomers from a polymerization process, wherein said process comprises the steps of
| 04-03-2014 |
| 20150073106 | Processes and Apparatus for Continuous Solution Polymerization - This invention relates to a blocked process for producing polymers of high and low molecular weights utilizing the same polymer separator. The separator is operated in a different mode depending on the molecular weight of the polymer being produced such that the separation system is operated in flash mode for the separation of low molecular weight polymers and operated in lower critical solution temperature (LCST) mode for the separation of high molecular weight polymers. | 03-12-2015 |
| 20150141591 | SOLUTION PROCESS FOR THE PRODUCTION OF EP(D)M ELASTOMERS AND POLYMERISATION REACTOR FOR USE IN SAID PROCESS - The invention describes a process for the production of EP(D)M in solution in a stirred reactor (CSTR) in which the reaction bath is kept in a boiling condition at a temperature of between 40 and 60° C. and at a pressure of between 0.6 and 1.3 MPa, and in which from 40% to 80% of the reaction heat is removed by boiling the reaction bath and the remaining reaction heat is removed by subcooling the fluids recycled to the reactor. The reactor is provided with a stirring system with three impellers, a device for distribution of the recycled fluids at the bottom of the reactor and a gamma ray level control device. | 05-21-2015 |
| 20160023966 | Ethylene Recovery by Absorption - A process for recovery of ethylene from a polymerization product stream of a polyethylene production system, comprising separating a light gas stream from the polymerization product stream, wherein the light gas stream comprises ethane and unreacted ethylene, contacting the light gas stream with an absorption solvent system, wherein the contacting the light gas stream with the absorption solvent system occurs at a temperature in a range of from about 40° F. to about 110° F., wherein at least a portion of the unreacted ethylene from the light gas stream is absorbed by the absorption solvent system, and recovering unreacted ethylene from the absorption solvent system to yield recovered ethylene. | 01-28-2016 |
| 20160168288 | POLYMERIZATION PROCESS | 06-16-2016 |
| 20160176994 | DEVICE AND METHOD FOR RE-CIRCULATING RAW MATERIAL USED WHEN MANUFACTURING POLYBUTENE | 06-23-2016 |
| 526069000 | Recycling catalyst | 2 |
| 20100292416 | METHODS AND APPARATUS FOR POLYMERIZATION - Apparatus and methods for olefin polymerization are provided. A fluidized bed reactor may include a cylindrical section, a dome, a transition section between the cylindrical section and the dome, at least three outlet nozzles disposed on the dome, and a recycle line in fluid communication with the at least three outlet nozzles. | 11-18-2010 |
| 20110224389 | METHOD FOR RECYCLING AMINE CATALYST IN INTERFACIAL POLYCARBONATE MANUFACTURING PROCESS - The present invention relates to an improved process for recycling a coupling catalyst, preferably an amine catalyst in an interfacial polycarbonate manufacturing process. Specifically, the amine catalyst is recycled in an acidic wash water solution. | 09-15-2011 |
| 526070000 | Recycling diluent | 8 |
| 20080234447 | Polydispersity-controlled isoolefin polymerization with polymorphogenates - The disclosure provides for a process and polymerization system to produce isoolefin polymers ( | 09-25-2008 |
| 20080269435 | Polymerization Process - A process for the polymerisation of ethylene and optionally at least one C | 10-30-2008 |
| 20090221769 | Method for the preparation of linera alpha-olefins and reactor system therefor with improved disposal of high molecular weight oligomers - The present invention relates to a method for processing high molecular weight oligomer waste products formed during the production of linear alpha-olefins by oligomerization of ethylene in a reactor in the presence of a solvent and a catalyst, characterized in that the high molecular weight oligomers are separated in a separation unit from a product stream of the reactor comprising the solvent, the catalyst, linear alpha-olefins and high molecular weight oligomers having a solidification temperature in the range of about 60-100° C., then diluted with a dilution medium and heated to about 130° C. to about 200° C., the diluted high molecular weight oligomers are then transferred to a disposal device, wherein at least some of the dilution medium may be recovered and recycled for addition to the dilution medium. | 09-03-2009 |
| 20100048838 | ISOOLEFIN-DIOLEFIN PRODUCTION PROCESS AND APPARATUS THEREFORE - In an isoolefin-diolefin rubber production process (e.g. a butyl rubber production process), the cold rubber slurry produced in the reaction vessel is transported from the reaction vessel to the flash tank during which time the cold slurry may be expressed to separate at least part of the cold liquid reaction medium from the isoolefin-diolefin rubber. The separated cold liquid reaction medium is transported off stream, for example by a mechanical filter, where it can be recycled back into the reaction vessel and/or where it can be used to cool a feed stream or streams of the reaction components. The isoolefin-diolefin rubber and the residual liquid reaction medium are transported to a flash tank for further processing. The ability to separate and recycle cold liquid reaction medium makes the process more economical. In one aspect, the slurry may be transported from the reaction vessel to the flash tank by a self-cleaning fully intermeshing co-rotating twin screw extruder, which helps overcome the problem of plugging due to rubber sticking to the surfaces of the slurry transfer apparatus. | 02-25-2010 |
| 20100121003 | Method for Producing Water-Absorbing Polymer Particles by Suspension Polymerisation - A process for producing water-absorbing polymeric particles by a suspension polymerization with recycling of the hydrophobic solvent, the hydrophobic solvent comprising branched saturated aliphatic hydrocarbons. | 05-13-2010 |
| 20100317812 | Method And Apparatus For Reducing Fouling - Provided herein is a method for operating a slurry polymerization reaction system to reduce, inhibit, and/or prevent fouling in the polymer recovery and separation apparatus, including one or more portions of a high pressure flash tank. The method generally comprises polymerizing a monomer feed in a slurry polymerization reactor in the presence of catalyst and diluent to produce a polymerization effluent; continuously discharging at least a portion of said polymerization effluent from the reactor through a discharge valve; combining a catalyst poison stream with the polymerization effluent downstream of said discharge valve, wherein the catalyst poison stream comprises a catalyst poison that is a gas at standard conditions; and flashing the combination of polymerization effluent and catalyst poison stream in a first flash tank. | 12-16-2010 |
| 20110040050 | PROCESS FOR PREPARING POLYACRYLATES - Use of amino acids as regulator substances in the free-radical polymerization of monomer mixtures comprising at least 70% by weight of at least one acrylic and/or methacrylic ester and reaction solution comprising one or more solvents and one or more monomers, at least 50% by weight of the solvents being organic solvents, and at least 70% by weight of the monomers being acrylic and/or methacrylic esters, with at least one amino acid is being present. | 02-17-2011 |
| 20160096783 | POLYOLEFIN MANUFACTURING SYSTEM INCLUDING A MEMBRANE FRACTIONATION SYSTEM FOR DILUENT RECOVERY - A fractionation system for a polymerization reactor includes a membrane separation system designed to separate light components, such as unreacted monomer and inerts, from diluent. The membrane separation system may employ one or more membrane modules designed to separate hydrocarbons based on size, solubility, or combinations thereof. The fractionation system also may include a heavies fractionation column designed to separate heavy components, such as unreacted comonomer and oligomers, from the diluent. | 04-07-2016 |
