Class / Patent application number | Description | Number of patent applications / Date published |
560218000 | Purification or recovery | 18 |
20090209783 | Process for the production of hydroxyalkyl (meth)acrylates - The present invention relates to a process for producing high purity hydroxyalkyl (meth)acrylates. Specifically, the present invention relates to an improved process which can commercially and advantageously yield high purity hydroxyalkyl (meth)acrylates from (meth)acrylic acid and alkylene oxides. | 08-20-2009 |
20090299090 | Method for production of purified (meth)acrylic acid - The present invention relates to reducing corrosion of distillation equipment during azeotropic distillation of (meth)acrylic acid in the presence of dissolved copper, by providing aqueous (meth)acrylic acid having not more than 0.1% by weight formaldehyde, based on the total weight of the aqueous (meth)acrylic acid. The source of the copper may, for example, be copper-based polymerization inhibitors added to the aqueous (meth)acrylic acid and/or distillation equipment. | 12-03-2009 |
20100317887 | PROCESS FOR PREPARING (METH)ACRYLATES OF C10-ALCOHOL MIXTURES - Process for preparing (meth)acrylates of C | 12-16-2010 |
20110152568 | Allyl acetate purification - A process for purifying allyl acetate is disclosed. An acetoxylation mixture is distilled at elevated pressure to remove propylene and generate a first bottoms mixture comprising allyl acetate, acetic acid, acrolein, allyl diacetate, and 3-acetoxypropionaldehyde. The first bottoms mixture is flash vaporized, and the resulting vapor is contacted with a solid acidic catalyst under conditions effective to decompose allyl diacetate and 3-acetoxypropionaldehyde. The flashed product, which comprises allyl acetate, acetic acid, and acrolein, is then distilled to remove acrolein and generate a second bottoms mixture comprising allyl acetate and acetic acid. The second bottoms mixture can be used to manufacture allyl alcohol. | 06-23-2011 |
20110230675 | METHOD OF RECOVERING (METH) ACRYLIC ACID ESTER - The present invention provides a method of recovering a (meth)acrylic acid ester, which comprises the steps of: (a) carrying out an esterification reaction between an alcohol and (meth)acrylic acid in the presence of a catalyst to obtain a (meth)acrylic acid ester, wherein a byproduct is generated together with the (meth)acrylic acid ester; and (b) subjecting the byproduct generated in step (a) to a reaction with a catalyst and water in a reactor, wherein the water is fed into the reactor in order that water content exceeds 0 wt % but is 10 wt % or less in the reactor based on the total weight of reactants comprising the byproduct, the catalyst and the water, and thereby separating the (meth)acrylic acid, the alcohol and the (meth)acrylic acid ester contained in the byproduct from the byproduct to obtain the (meth)acrylic acid, the alcohol and the (meth)acrylic acid ester as a recovered product. | 09-22-2011 |
20120029229 | METHOD FOR PRODUCING HIGH PURITY TERMINAL OLEFIN COMPOUND - An industrially advantageous method for producing a high purity terminal olefin is disclosed, comprising the steps of (a) contacting a mixture comprising a terminal olefin represented by formula (1): | 02-02-2012 |
20130006012 | METHODS OF REFINING NATURAL OILS, AND METHODS OF PRODUCING FUEL COMPOSITIONS - A method of refining a natural oil includes: (a) providing a feedstock that includes a natural oil; (b) reacting the feedstock in the presence of a metathesis catalyst to form a metathesized product that includes olefins and esters; (c) passivating residual metathesis catalyst with an agent selected from the group consisting of (i) a salt and/or an ester of a phosphorous oxo acid, (ii) a derivative of the phosphorous oxo acid in which at least one P—H bond has been replaced by a P—C bond, (iii) a salt and/or an ester of the derivative, and (iv) combinations thereof; (d) separating the olefins in the metathesized product from the esters in the metathesized product; and (e) transesterifying the esters in the presence of an alcohol to form a transesterified product and/or hydrogenating the olefins to form a fully or partially saturated hydrogenated product. | 01-03-2013 |
20130158288 | Process For Producing Acrylic Acids and Acrylates - In one embodiment, the invention is to process for producing acrylics. The process includes the steps of contacting a crude product stream with an extraction agent mixture at a temperature less than 50° C. | 06-20-2013 |
20130217914 | PROCESS FOR PRODUCING METHYL METHACRYLATE HAVING REDUCED BIACETYL CONTENT - This invention provides a process for reducing biacetyl in alpha-, beta-unsaturated carboxylic acid esters, particularly in acrylic or methacrylic (hereinafter “(meth)acrylic”) esters, which comprise low levels of weak acid. | 08-22-2013 |
20140135523 | CONTINUOUS PROCESS FOR PREPARING (METH)ACRYLATES OF C10-ALCOHOL MIXTURES - A continuous process for preparing (meth)acrylates of C | 05-15-2014 |
20140243551 | METHOD OF ISOLATING INGENOL - The present invention relates to a new method for isolating ingenol (C | 08-28-2014 |
20140275613 | CONVERSION OF FREE FATTY ACIDS TO ETHYL ESTERS - Various embodiments of the present invention include systems and methods for converting free fatty acids to ethyl esters. An exemplary method may comprise contacting the free fatty acid with a non-polar solvent. A mineral acid and an alcohol may then be added to form a two-phase mixture. An aqueous phase my subsequently be removed from the mixture. The processes and methods may be used in the manufacture of supplements, pharmaceuticals, cosmetic and beauty products, feedstocks, and the like. | 09-18-2014 |
20140275614 | PRODUCTION AND PURIFICATION OF CARBOXYLIC BETAINE ZWITTERIONIC MONOMERS - A method is provided for the production and purification of carboxylic betaine-based zwitterionic vinyl monomers, such as (meth)acrylic or (meth)acrylamide monomer containing a betaine-type group of the formula: | 09-18-2014 |
20150038736 | VERTICAL CENTRIFUGAL THIN FILM EVAPORATOR AND MONOMER PURIFICATION METHOD - A vertical centrifugal thin film evaporator is equipped with: a cylindrical body in which an central axis of a circle is set in a vertical direction; a rotor that rotates an interior of the cylindrical body in a circumferential direction thereof; a wiper that slides on an inner circumferential surface of the cylindrical body; a fixing support that fixes the wiper and is mounted on the rotor; and a heater that heats a circumferential surface of the cylindrical body. A liquid-withdrawing structure that communicates between a space surrounded by the wiper and the fixing support and a space outside the wiper and the fixing support is formed on at least one of the wiper and the fixing support, thereby preventing a liquid to be processed from being retained between the wiper and the fixing support. | 02-05-2015 |
20150045579 | PROCESS FOR PURIFICATION OF METHYL METHACRYLATE USING MOLECULAR SIEVE MEMBRANES - A method for separating the components of a mixture containing methyl methacrylate, water, and methanol in which the mixture is dehydrated in a first stage membrane unit, producing a dehydrated mixture. Methanol in the dehydrated mixture is removed in a second stage membrane unit, producing a retentate stream containing methyl methacrylate and substantially no said methanol. | 02-12-2015 |
20150087857 | LIQUID-LIQUID EXTRACTION PROCESS FOR THE PRODUCTION OF ACRYLIC ESTERS - The invention relates to a liquid-liquid extraction process, comprising:
| 03-26-2015 |
20160159725 | METHOD FOR CONTINUOUS PRODUCTION OF LIGHT ACRYLATES BY ESTERIFICATION OF A RAW ESTER-GRADE ACRYLIC ACID - The present invention relates to methods by which the thermal dissociation of Michael adducts present in a stream of crude acrylic acid, called “crude ester grade”, and the esterification reaction of acrylic acid present in the stream of crude acrylic acid, or generated in situ by thermal dissociation, with a light alcohol, are carried out simultaneously. | 06-09-2016 |
20160376217 | PURIFICATION OF (METH)ACRYLIC ESTERS BY MEMBRANE SEPARATION DEHYDRATION - The present invention relates to the production of (meth)acrylic esters, and more particularly the production of C | 12-29-2016 |