| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 562599000 | Formation of ethylenic unsaturation | 60 |
| 20090118542 | Process for Production of Optically Active Carboxlic Acid Compound - An optically active acylated camphorsultam can be hydrolyzed with an aqueous solution of an alkaline earth metal hydroxide in the presence of a branched alkanol, to give a corresponding optically active carboxylic acid compound in safely and inexpensively. | 05-07-2009 |
| 20090312574 | Method for Producing Optically Active Fluorine-Containing Carbonyl-ene Product - An optically active, fluorine-containing carbonyl-ene product is produced by reacting a fluorine-containing α-ketoester with an alkene in the presence of a transition metal complex having an optically active ligand. There are Mode 1 of conducting this reaction in the absence of reaction solvent, Mode 2 of conducting this reaction in a solvent that is low in relative dielectric constant, and Mode 3 of conducting this reaction in a halogenated hydrocarbon-series solvent. In each of these three modes, it is possible to produce the optically active, fluorine-containing carbonyl-ene product with low cost. | 12-17-2009 |
| 20110105791 | PROCESS FOR PREPARING ACRYLIC ACID PURIFIED BY CRYSTALLIZATION FROM HYDROXYPROPIONIC ACID AND APPARATUS THEREFORE - The invention relates to a process for the preparation of acrylic acid and a process for the preparation of polyacrylic acid comprising the process steps: (a1) preparation of 3-hydroxypropionic acid from a biological material to give a fluid, in particular aqueous, phase containing 3-hydroxypropionic acid; (a2) dehydration of the 3-hydroxypropionic acid to give a fluid, in particular aqueous, solution containing acrylic acid; (a3) purification of the solution containing acrylic acid by a suspension crystallization or a layer crystallization to give a purified phase; and corresponding devices for carrying out these processes, and acrylic acid and polyacrylates. The invention is distinguished in that acrylic acid and polyacrylates can thereby be prepared efficiently, inexpensively, and sustainably with simple means and with a high purity on the basis of regenerable raw materials. | 05-05-2011 |
| 20120022291 | CATALYST FOR PRODUCTION OF ACROLEIN AND ACRYLIC ACID BY MEANS OF DEHYDRATION REACTION OF GLYCERIN, AND PROCESS FOR PRODUCING SAME - A process for converting glycerin into valuable chemical raw material. A catalyst for use in the production of acrolein and acrylic acid by a dehydration reaction of glycerin, which enables the production of acrolein and acrylic acid in high yield. Glycerin dehydration catalyst which mainly comprises a phosphorus-vanadium complex oxide that contains phosphorus and vanadium as the essential constituent elements. | 01-26-2012 |
| 20120071688 | PROCESS FOR PREPARING ACRYLIC ACID FROM METHANOL AND ACETIC ACID - A process for preparing acrylic acid from methanol and acetic acid, in which, in a reaction zone A, the methanol is partially oxidized to formaldehyde in a heterogeneously catalyzed gas phase reaction, the product gas mixture A obtained and an acetic acid source are used to obtain a reaction gas input mixture B which comprises acetic acid and formaldehyde and has the acetic acid in excess over the formaldehyde, and the formaldehyde present in reaction gas input mixture B is aldol-condensed to acrylic acid under heterogeneous catalysis in a reaction zone B with acetic acid present in reaction gas input mixture B, and unconverted acetic acid still present alongside the acrylic acid target product in the product gas mixture B obtained is removed therefrom, and the acetic acid removed is recycled into the production of reaction gas input mixture B. | 03-22-2012 |
| 20120277466 | CATALYST FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a catalyst composition, comprising vanadium and titanium. Preferably, the molar ratio of vanadium to titanium in an active phase of the catalyst composition is greater than 0.5:1. | 11-01-2012 |
| 20120277467 | Method for Synthesizing Unsaturated Carboxylic Acid and/or Derivative of Same - An appropriate catalyst is found for synthesis of an unsaturated carboxylic acid and/or a derivative thereof using as a raw material compound a hydroxycarboxylic acid and/or a derivative thereof that can easily be synthesized from a polysaccharide such as biomass-derived cellulose, and an efficient method for synthesizing the unsaturated carboxylic acid and/or the derivative thereof is provided. This method is a method for synthesizing an unsaturated carboxylic acid and/or a derivative thereof, wherein an apatite compound is used as a catalyst to synthesize the unsaturated carboxylic acid and/or the derivative thereof from a biomass-derived hydroxycarboxylic acid and/or a derivative thereof by a dehydration reaction. | 11-01-2012 |
| 20120289743 | CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a catalyst composition comprising vanadium, titanium; and at least one oxide additive. The at least one oxide additive is present in an amount of at least 0.1 wt % based on the total weight of the catalyst composition. The molar ratio of titanium to metal additive in an active phase of the catalyst composition is at least 0.05:1. | 11-15-2012 |
| 20130072715 | PROCESS FOR PREPARING V-Ti-P CATALYSTS FOR SYNTHESIS OF 2,3-UNSATURATED CARBOXYLIC ACIDS - The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly using an industrially relevant aqueous liquid feed. | 03-21-2013 |
| 20130072716 | PROCESS FOR PREPARING MODIFIED V-Ti-P CATALYSTS FOR SYNTHESIS OF 2,3-UNSATURATED CARBOXYLIC ACIDS - The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus modified with alkali metal. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly using an industrially relevant aqueous liquid feed. | 03-21-2013 |
| 20130079553 | CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition has a surface area of at least 22.6 m | 03-28-2013 |
| 20130079554 | METHODS FOR THE SYNTHESIS OF DEUTERATED ACRYLATE SALTS - A method for synthesizing a deuterated acrylate of the Formula (1), the method comprising: (i) deuterating a propiolate compound of Formula (2) to a methyne-deuterated propiolate compound of Formula (3) in the presence of a base and D | 03-28-2013 |
| 20130085293 | CATALYSTS FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a catalyst composition comprising vanadium and titanium. The catalyst composition further comprises ethylene glycol and citric acid. Preferably, the catalyst composition is substantially free of oxalic acid and lactic acid. | 04-04-2013 |
| 20130085294 | PROCESSES FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of providing a crude product stream comprising the acrylate product and an alkylenating agent. The process further comprises the step of separating at least a portion of the crude product stream to form an alkylenating agent stream and an intermediate product stream. The alkylenating agent stream comprises at least 1 wt % alkylenating agent and the intermediate product stream comprises acrylate product. | 04-04-2013 |
| 20130085295 | PROCESSES FOR PRODUCING ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of reacting an alcohol and oxygen in a reactor to produce a high temperature alkylenating agent stream comprising an alkylenating agent. The process further comprises the step of contacting an alkanoic acid with at least a portion of the high temperature alkylenating agent stream under conditions effective to form a crude product stream comprising acrylate product and alkylenating agent. The process further comprises the step of separating at least a portion of the crude product stream to form at least one alkylenating agent stream and at least one purified acrylate product stream comprising acrylate product. | 04-04-2013 |
| 20130085296 | PROCESSES FOR THE PRODUCTION OF ACRYLIC ACIDS AND ACRYLATES - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of reacting a reaction mixture comprising an alkanoic acid, an alkylenating agent, and oxygen over a catalyst and under conditions effective to form a crude acrylate product. Preferably, the reaction mixture comprises from 0.5 wt % to 10 wt % oxygen. The crude acrylate product comprises acrylate product and alkylenating agent. The process further comprises the step of separating at least a portion of the crude product to form at least one alkylenating agent stream and at least one purified acrylate product stream. The purified acrylate product stream comprises acrylate product. | 04-04-2013 |
| 20130085297 | Processes for Producing Acrylic Acids and Acrylates with Pre- and Post-Reactor Dilution - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of reacting a reaction mixture comprising a first diluent, an alkylenating agent and an alkanoic acid to form a crude acrylate product comprising alkylenating agent and acrylate product. The crude acrylate product is then diluted with a second diluted to form a diluted crude acrylate stream. The diluents are then removed from the diluted crude acrylate stream to form a liquid acrylate stream. The process further comprises the step of separating at least a portion of the liquid acrylate stream to form an alkylenating agent stream and an intermediate product stream. The alkylenating agent stream comprises at least 1 wt. % alkylenating agent and the intermediate product stream comprises acrylate product. | 04-04-2013 |
| 20130085298 | Processes for Producing Acrylic Acids and Acrylates with Liquid Product Dilution - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of providing a crude acrylate product comprising the acrylate product and an alkylenating agent. The process further comprises the steps of removing inert and/or reactive gases from the crude product to form a liquid acrylate stream, diluting the liquid acrylate stream with a diluent to form a diluted liquid acrylate stream, and then separating at least a portion of the diluted liquid acrylate stream to form an alkylenating agent stream and an intermediate product stream. The alkylenating agent stream comprises at least 1 wt. % alkylenating agent and the intermediate product stream comprises acrylate product. | 04-04-2013 |
| 20130085299 | Processes for Producing Acrylic Acids and Acrylate with Diluted Crude Acrylate Stream - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of providing a crude acrylate product comprising the acrylate product and an alkylenating agent. The process further comprises the step of diluting the crude acrylate product with a diluent to form a diluted crude acrylate stream and recovering acrylate product from the diluted crude acrylate stream. | 04-04-2013 |
| 20130085300 | Processes for the Production of Acrylic Acids and Acrylates From A Trioxane Feed - In one embodiment, the invention relates to a process for producing an acrylate product. The process comprises the step of reacting a reaction mixture comprising an alkanoic acid and an alkylenating agent composition under conditions effective to form a crude acrylate product. The alkylenating agent composition comprises at least 1 wt % of a ring-structured compound comprising at least two oxygen atoms and at least one carbon atom, e.g., trioxane and/or tetraoxane. The process further comprises the step of separating at least a portion of the crude acrylate product to form at least one alkylenating agent stream and at least one purified acrylate product stream comprising acrylate product. | 04-04-2013 |
| 20130158295 | Processes For The Production of Acrylic Acids and Acrylates - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of dehydrating a crude alkylenating agent stream to form a dehydrated alkylenating agent stream and a water stream. The process further comprises reacting acetic acid with at least a portion of the dehydrated alkylenating agent stream to form a crude acrylate product stream comprising acrylate product and alkylenating agent stream. The dehydrating of the crude alkylenating stream is accomplished using at least one evaporator or at least one distillation column. | 06-20-2013 |
| 20130237724 | PROCESS FOR PREPARING V-Ti-P CATALYSTS FOR SYNTHESIS OF 2,3-UNSATURATED CARBOXYLIC ACIDS - The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly using an industrially relevant aqueous liquid feed. Additionally, the catalyst composition is catalytically active towards the formation of acrylic acid from methylene diacetate and methacrylic acid from methylene dipropionate; both reactions are carried out with high space time yields. | 09-12-2013 |
| 20130267736 | Processes for Producing Acrylic Acids and Acrylates with Diluted Reaction Mixture and By-Product Recycle - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of providing a diluted crude acrylate stream comprising the acrylate product and an alkylenating agent. The process further comprises the step of separating at least a portion of the diluted crude acrylate stream to form an alkylenating agent stream and an intermediate product stream. The alkylenating agent stream comprises at least 1 wt. % alkylenating agent and the intermediate product stream comprises acrylate product. | 10-10-2013 |
| 20130267737 | Processes for Producing Acrylic Acids and Acrylates with Controlled Oxygen Concentration Across Reactor - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of producing a crude product stream by reacting reactants comprising an alkanoic acid, an alkylenating agent and oxygen in the presence of a catalyst, wherein the oxygen concentration across the reactor is from 0.5 to 10 wt %. The oxygen may be fed to the reactor through a plurality of feeds. The invention is also directed to methods of monitoring the oxygen concentration for the reaction and adjusting the oxygen concentration and/or placement of oxygen feed(s). The process further comprises the step of separating at least a portion of the crude product stream to form an alkylenating agent stream and an intermediate product stream. | 10-10-2013 |
| 20130274512 | Catalysts Conversion Of Hydroxypropionic Acid Or Its Derivatives To Acrylic Acid Or Its Derivatives - Methods for catalytically dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed condensed phosphates. | 10-17-2013 |
| 20130274513 | Process For Production Of Acrylic Acid Or Its Derivatives From Hydroxypropionic Acid Or Its Derivatives - Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided. | 10-17-2013 |
| 20130274514 | Catalytic Conversion Of Lactic Acid To Acrylic Acid - Disclosed herein is the catalytic dehydration of lactic acid to acrylic acid, which is characterized by a high conversion of lactic acid, a high selectivity for acrylic acid, a high yield of acrylic acid, and correspondingly low selectivity and molar yields for undesired by-products. This is achieved with a particular class of catalysts defined by a mixture of metal-containing phosphate salts that together provide the catalyst with a very high basicity density and low acidity density. Further, the catalyst is believed to be stable and active for lengthy periods heretofore unseen in the art for such dehydration processes. | 10-17-2013 |
| 20130274515 | Process For Production Of Acrylic Acid Or Its Derivatives - Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided. | 10-17-2013 |
| 20130274516 | Method For The Production Of Acrylic Acid Or Its Derivatives - Methods for catalytically dehydrating hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propionic acid, and acetic acid, are provided. The catalysts are mixed monophosphates. | 10-17-2013 |
| 20130274517 | Process For Production Of Acrylic Acid Or Its Derivatives - Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided. The processes can be carried out either in a gas phase or in a liquid phase. | 10-17-2013 |
| 20130303801 | Novel Glycerol Dehydration Catalyst and Production Method Therefor - Provided is a novel catalyst that can produce acrolein and acrylic acid in high yields using glycerol as starting material. The disclosed glycerol dehydration catalyst has niobic oxide synthesized by hydrothermal synthesis as the main component. | 11-14-2013 |
| 20130317254 | Process for Producing Acrylic Acids and Acrylates - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of providing a crude product stream comprising the acrylate product and an alkylenating agent. The process further comprises the step of separating at least a portion of the crude product stream into an intermediate acrylate product stream and an alkylenating stream. The process further comprises separating at least a portion of the intermediate acrylate product stream by azeotropic distillation in the presences of an entrainer to form a stream containing acrylate product and a stream containing entrainer. | 11-28-2013 |
| 20140018574 | PROCESS FOR PREPARING ACRYLIC ACID BY A THERMOLYSIS OF POLY-3-HYDROXYPROPIONATE CATALYZED BY AT LEAST ONE MOLECULAR ACTIVE COMPOUND - A process for preparing acrylic acid by thermolysis of poly-3-hydroxypropionate in the presence of one or more specific tertiary amines as a catalyst. | 01-16-2014 |
| 20140066651 | PROCESS FOR PRODUCING AN ACRYLATE PRODUCT - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of reacting in a reactor a reaction mixture comprising alkanoic acid and an alkylenating agent under conditions effective to form a crude acrylate product. The process further comprises the step of separating at least a portion of the crude acrylate product to recover a finished acrylate product. The reaction is conducted at a reaction pressure less than 120 kPa. | 03-06-2014 |
| 20140121409 | Processes for the Production of Acrylic Acids and Acrylates Using Multiple Reactors - In one embodiment, the present invention relates to a process for producing an acrylate product comprising the step of providing a reaction system comprising at least one reaction zone and at least one regeneration zone. Each reaction zone and regeneration zone has a size and comprises a catalyst. A ratio of the combined size of the at least one reaction zone to the combined size of the at least one regeneration zone ranges between 1:1 to 6:1. The process further comprises the step of reacting, in the at least one reaction zone, a reaction mixture comprising an alkanoic acid and an alkylenating agent to form a crude acrylate product. The process further comprises the step of regenerating, in the at least one regeneration zone, the respective catalyst. The process further comprises the step of separating at least a portion of the crude acrylate products to form a purified acrylate product. | 05-01-2014 |
| 20140121410 | Processes for Regenerating Catalyst for Producing Acrylic Acids and Acrylates - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of reacting an alkanoic acid and an alkylenating agent over a catalyst to produce a crude acrylate product stream, and to product a used catalyst. The used catalyst may then be contacted with a regenerating stream to form a regenerated catalyst. Alkanoic acid and alkylenating agent may then be reacted over the regenerated catalyst to product additional crude acrylate product stream. | 05-01-2014 |
| 20140128636 | Processes for Producing Acrylic Acids and Acrylates - In one embodiment, the invention is to a process for producing an acrylate product. The process comprises the step of providing a crude product stream comprising the acrylate product and an alkylenating agent. The process further comprises the step of separating at least a portion of the crude product stream to form an alkylenating agent stream and an intermediate product stream. The alkylenating agent stream comprises at least 1 wt % alkylenating agent and the intermediate product stream comprises acrylate product. | 05-08-2014 |
| 20140135527 | Process for Producing Acrylic Acids and Acrylates - In one embodiment, the invention is to a catalyst composition, comprising vanadium and titanium. Preferably, the molar ratio of vanadium to titanium in an active phase of the catalyst composition is greater than 0.5:1. | 05-15-2014 |
| 20140155653 | AN IMPROVED PROCESS FOR CATALYTIC DEHYDRATION OF LACTIC ACID TO ACRYLIC ACID - Disclosed herein is an improved process for the catalytic dehydration of lactic acid to acrylic acid. More particularly, the present invention discloses catalytic dehydration of lactic acid to acrylic acid with high selectivity and yield for acrylic acid using calcium phosphate (CP) catalyst with varying Ca/P ratio optionally modified with 5 wt % sodium. | 06-05-2014 |
| 20140171684 | Process for Producing an Acrylate Product - In one embodiment, the invention is directed to a process for producing an acrylate product. The process comprises the step of reacting in a reactor a reaction mixture comprising an alkanoic acid and a liquid alkylenating agent source comprising methanol in an amount less than 0.5 wt. % over a catalyst and under conditions effective to form a crude acrylate product comprising acrylate product and alkylenating agent. The process further comprises the step of separating at least a portion of the crude acrylate product to form at least one alkylenating agent stream and at least one purified acrylate product stream comprising acrylate product. | 06-19-2014 |
| 20140171685 | CONTINUOUS CATALYST REGENERATION IN A FLUIDIZED BED REACTOR - A catalytic reactor including a chamber ( | 06-19-2014 |
| 20140343318 | PROCESS FOR PREPARING VINYLIDENECARBOXYLIC ACID (ESTER)S BY REACTION OF FORMALDEHYDE WITH ALKYLCARBOXYLIC ACID (ESTER)S - Process for preparing a vinylidenecarboxylic acid or ester thereof, wherein a reaction gas comprising gaseous formaldehyde, molecular oxygen and an alkycarboxylic acid or ester thereof is brought into contact with a solid catalyst whose active composition comprises a vanadium-phosphorus oxide having an average oxidation state of vanadium of from +4.40 to +5.0 to give a product gas comprising the vinylidenecarboxylic acid or ester thereof. | 11-20-2014 |
| 20140343319 | PROCESS FOR PREPARING ACRYLIC ACID WITH HIGH SPACE-TIME YIELD - In a process for preparing acrylic acid, a reaction gas which comprises a gaseous formaldehyde source and gaseous acetic acid and in which the partial pressure of the formaldehyde source, calculated as formaldehyde equivalents, is at least 85 mbar and in which the molar ratio of the acetic acid to the formaldehyde source, calculated as formaldehyde equivalents, is at least 1 is contacted with a solid condensation catalyst. The space-time yield can be enhanced significantly by increasing the partial pressure of the reactants. The space-time yield remains high even after prolonged process duration. | 11-20-2014 |
| 20150025272 | PROCESS FOR PREPARING MODIFIED V-TI-P CATALYSTS FOR SYNTHESIS OF 2,3-UNSATURATED CARBOXYLIC ACIDS - The invention relates to a catalyst composition comprising a mixed oxide of vanadium, titanium, and phosphorus modified with alkali metal. The titanium component is derived from a water-soluble, redox-active organo-titanium compound. The catalyst composition is highly effective at facilitating the vapor-phase condensation of formaldehyde with acetic acid to generate acrylic acid, particularly using an industrially relevant aqueous liquid feed. | 01-22-2015 |
| 20150031912 | Process For Production Of Acrylic Acid Or Its Derivatives From Hydroxypropionic Acid Or Its Derivatives - Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided. | 01-29-2015 |
| 20150031913 | Process For Production Of Acrylic Acid Or Its Derivatives From Hydroxypropionic Acid Or Its Derivatives - Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided. | 01-29-2015 |
| 20150080606 | METHODS FOR PREPARING METHACRYLIC ACID FROM BIOBASED STARTING MATERIALS - Described herein are methods for preparing methacrylic acid from biobased starting materials. | 03-19-2015 |
| 20150343431 | PROCESS FOR PREPARING ACRYLIC ACID USING AN ALUMINUM-FREE ZEOLITIC MATERIAL - The present invention relates to a process for preparing acrylic acid comprising (i) providing a stream comprising a formaldehyde source and acetic acid and (ii) contacting this stream with an aldol condensation catalyst comprising a zeolitic material, wherein the framework structure of the zeolitic material in (ii) includes Si and O, and has a molar Al:Si ratio of 0:1 to 0.001:1, and wherein the framework structure of the zeolitic material in (ii), in addition to Si and any Al, comprises one or more elements selected from the group consisting of tetravalent elements Y other than Si and trivalent elements X other than Al. | 12-03-2015 |
| 20150344394 | PROCESS FOR PREPARING ACRYLIC ACID USING AN ALKALI METAL-FREE AND ALKALINE EARTH METAL-FREE ZEOLITIC MATERIAL - A process for preparing acrylic acid, comprising (i) providing a stream S4 comprising a formaldehyde source and acetic acid; (ii) contacting stream S4 with an aldol condensation catalyst comprising a zeolitic material comprising aluminum in the framework structure to obtain a stream S6 comprising acrylic acid, the framework structure of the zeolitic material in (ii) comprising YO | 12-03-2015 |
| 20150353465 | PRODUCTION OF ACRYLIC ACID - The invention relates to a process for producing acrylic acid, comprising: converting a C3-oxygenate into a C3-hydroxyacid, wherein said C3-oxygenate is selected from the group consisting of 1-propanol, 2-propanol, propanal, acetone, monopropylene glycol, monohydroxyacetone, 2-hydroxypropanal, dihydroxyacetone and 2,3-dihydroxypropanal; and converting the C3-hydroxyacid into acrylic acid. | 12-10-2015 |
| 20160009626 | PROCESS FOR PREPARING V-Ti-P CATALYSTS FOR SYNTHESIS OF 2,3-UNSATURATED CARBOXYLIC ACIDS | 01-14-2016 |
| 20160016876 | ACRYLIC ACID PRODUCTION METHODS - In one aspect, the present invention encompasses safe and efficient methods for providing highly pure acrylic acid. In certain embodiments, the inventive methods include the step of producing polypropiolactone from ethylene oxide at a first location, transporting the polymer to a second location and pyrolyzing the polypropiolactone to provide glacial acrylic acid. In certain embodiments, the step of pyrolyzing the polymer is performed continuously in conjunction with a polymerization process to make SAPs. | 01-21-2016 |
| 20160090344 | METHOD FOR DEHYDRATING ALPHA-SUBSTITUTED CARBOXYLIC ACIDS - The present invention describes a process for preparing alpha-beta-unsaturated carboxylic acids by dehydration of hydroxycarboxylic or alkoxycarboxylic acids which are substituted in the alpha position, in particular 2-hydroxyisobutyric acid, while avoiding accumulation of by-products and additives. | 03-31-2016 |
| 20160096166 | SYNTHESIS CATALYST AND SYNTHESIS METHOD FOR UNSATURATED CARBOXYLIC ACID AND/OR DERIVATIVE THEREOF - It is an object of the present invention to provide a catalyst, which solves a problem in that when an unsaturated carboxylic acid or a derivative thereof has been conventionally synthesized from a hydroxycarboxylic acid or a derivative thereof by a dehydration reaction using a catalyst, the yield has been low, and which is capable of synthesizing the unsaturated carboxylic acid or a derivative thereof at a high yield, and also to provide a synthetic method capable of synthesizing an unsaturated carboxylic acid or a derivative thereof at a high yield. A synthetic catalyst for synthesizing an unsaturated carboxylic acid and/or a derivative thereof from a hydroxycarboxylic acid and/or a derivative thereof by a dehydration reaction, wherein the synthetic catalyst comprises an apatite compound containing an alkali metal in a crystal structure thereof, and a method for synthesizing an unsaturated carboxylic acid and/or a derivative thereof, which method comprises contacting the aforementioned synthetic catalyst with the hydroxycarboxylic acid and/or a derivative thereof, so as to synthesize the unsaturated carboxylic acid and/or a derivative thereof by a dehydration reaction. | 04-07-2016 |
| 20160107974 | Process For Production Of Acrylic Acid Or Its Derivatives - Processes for the catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives, or mixtures thereof to acrylic acid, acrylic acid derivatives, or mixtures thereof with high yield and selectivity and without significant conversion to undesired side products, such as, acetaldehyde, propanoic acid, and acetic acid, are provided. The processes can be carried out either in a gas phase or in a liquid phase. | 04-21-2016 |
| 20160122272 | METHOD FOR PRODUCING ACRYLIC ACID FROM GLYCEROL - Disclosed is a method of preparing acrylic acid from glycerol, including: (a) preparing products including allyl alcohol from reactants including glycerol and carboxylic acid; (b) adding a heterogeneous catalyst and a basic solution to the product including allyl alcohol and then performing oxidation, thus preparing a mixture composed of 3-hydroxypropionic acid and acrylic acid; (c) dehydrating 3-hydroxypropionic acid of the mixture composed of 3-hydroxypropionic acid and acrylic acid, thus producing acrylic acid. | 05-05-2016 |
| 20160130208 | SYNTHESIS OF ALPHA,BETA-UNSATURATED CARBOXYLIC ACID (METH)ACRYLATES FROM OLEFINS AND CO2 - The invention relates to a method for producing α,β-unsaturated carboxylic acids or salts thereof, comprising a step in which a metallalactone is reacted in a solvent in the presence of a halide; to a composition that comprises α,β-unsaturated carboxylic acids or salts thereof and halide ions; and to the use of said composition for the production of superabsorbent materials or as a monomer composition for producing polymers. | 05-12-2016 |
| 20160152541 | PROCESS FOR PREPARING ACRYLIC ACID | 06-02-2016 |
| 20160176797 | PROCESS FOR PREPARING ACRYLIC ACID FROM FORMALDEHYDE AND ACETIC ACID | 06-23-2016 |
| 20180022677 | DISTILLATION PROCESS FOR PRODUCTION OF ACRYLIC ACID | 01-25-2018 |
