| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 525054000 | Removing and recycling material from one zone to another | 10 |
| 20080281040 | Monomer recycle process for fluid phase in-line blending of polymers - A monomer recycle process for fluid phase in-line blending of polymers is provided. In one form, the monomer recycle process includes providing a first group (G1) of one or more reactor trains and a second group (G2) of one or more reactor trains and one or more separators fluidly connected to G1 and one separator fluidly connected to G2; polymerizing in each reactor train of G1 and G2 olefin monomers to form homogenous fluid phase polymer-monomer mixtures wherein each of the G1 and G2 reactor trains have at least one common monomer; passing the reactor effluents from the one or more G1 reactor trains through the one or more G1 separators to separate a monomer-rich phase from a polymer-enriched phase; passing the polymer-enriched phase and the reactor effluents from the one or more G2 reactor trains into the G2 separator (separator-blender) to separate another monomer-rich phase from a polymer-rich blend; recycling to one or more G1 reactor trains the separated monomer-rich phase from the one or more G1 separators; and recycling to one or more G2 reactor trains the separated monomer-rich phase from the G2 separator. The polymer-rich blend is conveyed to a downstream finishing stage for further monomer stripping, drying and/or pelletizing to form a polymer product blend. | 11-13-2008 |
| 20090043046 | Process for producing functionalized polymers - A method for preparing a functionalized polymer, the method comprising the steps of (a) polymerizing monomer in the presence of a coordination catalyst to form a polymer, (b) inhibiting said step of polymerizing with a Lewis base, and (c) reacting the polymer with a functionalizing agent. | 02-12-2009 |
| 20090062466 | Polyolefin Composite Material And Method For Producing The Same - The present invention belongs to the field of polyolefin alloy preparation, and particularly relates to a polyolefin composite material in good form with adjustable composition and performances, produced by controlling a composite catalyst composed of Zieglar-Natta catalyst and metallocene catalyst to be catalytic by stage in the olefin polymerization reaction. This material is composed of propylene polymer and ethylene copolymer which is obtained by copolymerizing ethylene with alpha olefin or diolefin, wherein: the molar content of alpha olefin or diolefin in the ethylene copolymer is 0%˜60%, and the ethylene copolymer is 3˜80% by weight of the polyolefin composite material; the polyolefin composite material is in particle form, and the ethylene copolymer has a molecular weight distribution of 1˜6 and a glass transition temperature of −80˜0° C.; and the ethylene copolymer produced in the reaction is dispersed homogeneously in the propylene polymer particles to form the polyolefin composite material. | 03-05-2009 |
| 20110060104 | PROCESS FOR BROMINATING BUTADIENE/VINYL AROMATIC COPOLYMERS - A polybutadiene brominating method uses a quaternary ammonium tribromide as the brominating agent. The brominating is performed in solution, and dual extractions recover the spent brominating agent and recombine it with fresh bromine to regenerate an active tribromide. Solvent and aqueous extraction streams can be purified and recycled as needed. | 03-10-2011 |
| 20110092645 | CONTINUOUS METHOD FOR MULTI-STAGED DRYING AND SUBSEQUENT CONDENSATION OF A POLYAMIDE GRANULATE - A continuous process for the multistage drying and postcondensation of polyamide pellets in the solid phase comprises
| 04-21-2011 |
| 20110207884 | PROCESS FOR THE SYNTHESIS OF FUNCTIONALIZED POLY (1,3- ALKADIENES) AND USE THEREOF IN THE PREPARATION OF HIGH IMPACT VINYL AROMATIC POLYMERS - Process for the preparation of vinyl aromatic (co) polymers grafted on an elastomer in a controlled manner, comprising: dissolving an elastomer functionalized with bromoalkanes and nitroxy radicals, soluble in non-polar solvents, in a liquid phase consisting of a mixture of vinyl aromatic monomer (s)/polymerization solvent; feeding at least one radical initiator to the mixture, containing the functionalized elastomer in solution, and polymerizing the mixture thus obtained at a temperature higher than or equal to 1200C; recovering the vinyl aromatic (co) polymer obtained after devolatization; and recycling the solvent/monomer (s) mixture, coming from the devolatization, to step (a). | 08-25-2011 |
| 20110218300 | PROCESS TO REMOVE SILANOL FROM THE PREPARATION OF A MODIFIED POLYMER - The invention provides a method for a preparation of a polymer selected from the following: (a) modified interpolymer comprising, in polymerized form, a conjugated diene and an aromatic alpha-olefin, or (b) a modified polymer comprising, in polymerized form, a conjugated diene; and wherein said method comprising at least the following steps: polymerizing monomers comprising at least one conjugated diene monomer in at least one polymerization reactor, in the presence of at least one solvent, to form the polymer, optionally coupling a fraction of the polymer chains using at least one coupling agent, modifying the polymer with at least one modifying agent, in at least one reactor, in the presence of the at least one solvent, to form a modified polymer solution; optionally, contacting the modified polymer solution with at least one proton donating compound; contacting the modified polymer solution with water; removing the at least one solvent; contacting the removed solvent with at least one material that will react with, and/or absorb, silanol to form a purified solvent, recirculating the purified solvent back to the at least one polymerization reactor or to a storage container. | 09-08-2011 |
| 20110251345 | DEODORIZATION OF POLYMER COMPOSITIONS - The present invention relates to a method for reducing residual volatiles from polymer compositions. | 10-13-2011 |
| 20130137819 | INTEGRATED PROCESS FOR PRODUCING POLYVINYL ALCOHOL OR A COPOLYMER THEREOF AND ETHANOL - Ethanol is produced from methyl acetate by a hydrogenolysis reaction. The methyl acetate is produced as a byproduct during the conversion of a vinyl acetate polymer or copolymer to a polymer or copolymer of vinyl alcohol. By integrating the two processes, a valuable product, i.e. ethanol, is produced from a methyl acetate byproduct. | 05-30-2013 |
| 20130137820 | Process For Producing Polyvinyl Alcohol Or A Copolymer Thereof - Acetic acid is converted to vinyl acetate monomer by a reaction with oxygen and ethylene. The vinyl acetate is polymerized to form a vinyl acetate polymer or copolymer, which is then reacted in a methanolysis reaction with methanol and base to form a polymer or copolymer of vinyl alcohol and a methyl acetate byproduct. Ethanol is produced from methyl acetate by a hydrogenolysis reaction. The hydrogenolysis reaction also produces methanol. At least a portion of this ethanol is converted to ethylene by a dehydration reaction. At least a portion of the ethylene produced in this dehydration reaction is recycled to react with acetic acid and oxygen to form vinyl acetate. By converting a byproduct and by recycle of compositions, a polymer or copolymer of vinyl alcohol is efficiently produced with minimal waste. | 05-30-2013 |
