Class / Patent application number | Description | Number of patent applications / Date published |
526071000 | REMOVING ONLY NONPOLYMERIZED OR NONPOLYMERIZABLE MATERIAL DURING POLYMERIZATION PROCESS | 14 |
20080234448 | Recovery and Washing Process for Polymers - The present invention relates to a recovery and washing process for polymer materials, in particular to an automated process for recovery and washing of a polymer sample from a high throughput reaction vessel, said process comprising: i) rinsing a polymer sample from a high throughput reaction vessel into a filtration vessel using a rinse liquid comprising a C5 to C8 paraffinic hydrocarbon, and providing in said filtration vessel a mixture comprising the polymer sample, rinse liquid and an oxygenate, ii) removing the rinse liquid and oxygenate from the polymer sample in said filtration vessel by filtration, and iii) subsequently washing said polymer sample in said filtration vessel to remove any residual rinse liquid comprising C5 to C8 paraffinic hydrocarbon. | 09-25-2008 |
20080281058 | PROCESS FOR PRODUCING ACRYLONITRILE-CONTAINING POLYMER LATEX - A process for producing a polymer latex includes a step of mixing at least one kind of polymerizable monomer with water and a polymerization initiator to perform a polymerization, wherein the at least one kind of polymerizable monomer includes an acrylonitrile in an amount of 50 mass % or more based on a total amount of the at least one kind of polymerizable monomer. | 11-13-2008 |
20090234083 | Polymerization Process for Preparing Polyolefins - A solution process for polymerizing one or more α-olefins of formula CH | 09-17-2009 |
20090299018 | Polylactide manufacturing apparatus and method for manufacturing polylactide - In a process of manufacturing polylactide, synthesis of high-quality polymers is achieved with a sufficient degree of vacuum secured. Provided is an apparatus for manufacturing polylactide which includes the steps of preparing lactide through oligomerization of lactic acid and depolymerization of the resulting oligomers, effecting ring-opening polymerization of the lactide, and removing unreacted lactide. The apparatus comprises an exhausting gas treatment device for reducing pressure in the step of removing unreacted lactide. The exhausting gas treatment device includes boilers ( | 12-03-2009 |
20100004408 | PROCESS FOR THE POLYOLEFIN FINISHING - A process to perform the finishing of polyolefins produced by gas-phase catalytic polymerization of one or more α-olefins in the presence of a polymerization diluent selected from a C | 01-07-2010 |
20100004409 | METHOD FOR PRODUCING POLYOXYMETHYLENES WITH CERTAIN DEACTIVATORS - A process for the preparation of polyoxymethylene homo- or copolymers (POM) by polymerization of suitable monomers and subsequent deactivation by addition of a deactivator, wherein the deactivator used is a highly branched or hyperbranched polymer A) which is selected from highly branched or hyperbranched polycarbonates A1) and highly branched or hyperbranched polyesters A2), the polymer A) comprising nitrogen atoms. | 01-07-2010 |
20110124829 | SYNTHESIS OF ACRYLIC OR METHACRYLIC ACID/ACRYLATE OR METHACRYLATE ESTER POLYMERS USING PERVAPORATION - Products and processes relating to the synthesis of copolymers or terpolymers are described. In particular, poly(acrylic acid-co-acrylate ester), poly(methacrylic acid-co-methacrylate ester), poly(acrylic acid-co-acrylate ester(I)-co-acrylate ester(II)), or poly(methacrylic acid-co-methacrylate ester(I)-co-methacrylate ester(II)), by esterification of polyacrylic or polymethacrylic acid with alcohols assisted by the pervaporation technique for extracting water are described. | 05-26-2011 |
20110152477 | METHOD FOR THE PRODUCTION OF POLYMERS - The present invention relates to methods useful for the production of polymer powder, and in particular to a method for transitioning from a first process for production of a first polymer to a second process for the production of a second polymer during a polymerisation campaign in a polymerisation apparatus, said polymerisation apparatus comprising a reaction vessel and a degassing vessel, in which the respective first and second processes each comprise: (a) bringing a principal olefin and a comonomer into contact with a catalyst under gas phase polymerisation conditions in the reaction vessel to form the respective first or second polymer, wherein said first and second process utilise the same principal olefin but differ in at least one of (i) the comonomer used and (ii) the reaction temperature at which the polymer is produced, and (b) subsequently contacting the respective first or second polymer with a purge gas in the degassing vessel to remove unreacted monomers, characterised in that the method for transitioning comprises changing the flow rate of purge gas in the degassing vessel from a first rate, X | 06-23-2011 |
20110207899 | ALIPHATIC POLYCARBONATE QUENCH METHOD - The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability. | 08-25-2011 |
20140066580 | Method For Removing Unreacted Monomers in Polymer Using SCC - The present invention provides a method for removing unreacted monomer in polymer using a SCC comprising a housing having a rotation axis; a supply part of at least one polymer formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move polymer supplied through the polymer supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving polymer from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting polymer moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone. The method for removing unreacted monomers in polymer using SCC according to the present invention may control polymer residence time and thus does not lower polymer stability even under high temperature condition, and has high area density and thus has excellent unreacted monomer removal efficiency without using steam and the like, or with a small amount of steam, and the like. | 03-06-2014 |
20140088273 | SCC EQUIPPED WITH FOAM REMOVAL UNIT - The present invention provides a SCC (Spinning Cone Column) equipped with a foam removal unit comprising: a housing having a rotation axis; a supply part of at least one reactant formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move supplied reactants through the reactant supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving reactant from a spinning cone at the upper part to a spinning cone at the lower part; a product collection part for collecting reactants moved through the spinning cone and the fixed cone; and a driving part for rotating the spinning cone, wherein a foam removal unit is installed on one side of the housing. The SCC according to the present invention solves the problems that foam is generated when separating material to be removed to decrease removal yield and lower stability of the product, and may improve removal yield and product stability because a foam removal unit is for removing generated foam is installed. | 03-27-2014 |
20140107302 | SCC WITH IMPROVIED MOBILITY OF MATERIAL TO BE REMOVED - The present invention relates to a SCC with improved mobility of material to be removed due to a wider distance between the upper stages than a distance between the lower stages. The present invention provides a SCC (Spinning Cone Column) comprising a housing having a rotation axis; a supply part of at least one reactant formed inside of the housing; at least two spinning cones that are installed so as to have a constant gradient from the upper part to the lower part to the rotation axis, move reactants supplied through the reactant supply part, and rotate around the rotation axis; a fixed cone that is fixed and formed on the inner side of the housing, and provides a pathway for sequentially moving reactant from a spinning cone at the upper part to a spinning cone at the lower part;
| 04-17-2014 |
20150361215 | ALIPHATIC POLYCARBONATE QUENCH METHOD - The present disclosure is directed to, in part, an aliphatic polycarbonate polymerization reaction initiated by combining an epoxide with carbon dioxide in the presence of a catalytic transition metal-ligand complex to form a reaction mixture, and further quenching that polymerization reaction by contacting the reaction mixture with an acid containing a non-nucleophilic anion produces a crude polymer solution with improved stability and processability. | 12-17-2015 |
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 |