Class / Patent application number | Description | Number of patent applications / Date published |
562524000 | Of carboxylic acid or ester | 13 |
20080293968 | Method for regenerating catalyst for the production of methacrylic acid and process for preparing methacrylic acid - A catalyst for the production of methacrylic acid comprising a heteropolyacid compound containing phosphorus and molybdenum is regenerated by a method comprising the steps of drying a mixture containing a deactivated catalyst, an ammonium ion, a nitrate ion and water, molding the dried mixture, firstly calcining the molded product in an atmosphere of an oxidizing gas at a temperature of 360 to 410° C., and then secondly calcining the product in an atmosphere of a non-oxidizing gas at a temperature of 420 to 500° C. The regenerated catalyst has substantially the same catalytic activity as a fresh catalyst in a gas phase catalytic oxidation reaction of methacrolein, isobutylaldehyde, isobutane or isobutyric acid to prepare methacrylic acid. | 11-27-2008 |
20090023952 | PALLADIUM-CONTAINING CATALYST, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING ALPHA, BETA-UNSATURATED CARBOXYLIC ACID - Disclosed is a palladium-containing catalyst which enables to produce an α,β-unsaturated carboxylic acid in high selectivity from an olefin or an α,β-unsaturated aldehyde. Also disclosed are a method for producing such a catalyst and a method for producing an α,β-unsaturated carboxylic acid using such a catalyst. Specifically disclosed is a palladium-containing catalyst containing 0.001 to 0.25 mole of antimony element to 1 mole of palladium element or a palladium-containing catalyst containing palladium element which composes a metal, tellurium element, and bismuth element. | 01-22-2009 |
20090036707 | Method for manufacturing catalyst for use in production of methacrylic acid - It is an object of the present invention to provide a catalyst having excellent performance and high mechanical strength for use in the production of methacrylic acid. | 02-05-2009 |
20090234158 | Catalyst for use in production of methacrylic acid and method for manufacturing the same - It is an object to provide a simple method for producing catalysts available in various reaction conditions, that allow gas-phase catalytic oxidation of methacrolein and the like to give methacrylic acid with high yield, high selectivity and stable methacrylic yield over extended time. | 09-17-2009 |
20090259070 | METHOD FOR REGENERATING CATALYST FOR THE PRODUCTION OF METHACRYLIC ACID AND PROCESS FOR PREPARING METHACRYLIC ACID - A catalyst for the production of methacrylic acid comprising a heteropolyacid compound containing phosphorus and molybdenum is regenerated by a method comprising the steps of heat-treating a mixture containing a deactivated catalyst, water, a nitrate ion and an ammonium ion having a molar ratio to the nitrate ion of 1.3 or less at a temperature of at least 100° C., drying the mixture to obtain a dried catalyst, and calcining the dried catalyst. The regenerated catalyst has substantially the same catalytic activity as a fresh catalyst in a gas phase catalytic oxidation reaction of methacrolein, isobutylaldehyde, isobutane or isobutyric acid to prepare methacrylic acid. | 10-15-2009 |
20100210873 | METHOD FOR PRODUCING CARBOXYLIC ACID - It is an object of this invention to provide a method for efficiently synthesizing monocarboxylic acid, dicarboxylic acid, and tricarboxylic acid with the use of unsaturated triacyl glycerol as a starting material and hydrogen peroxide as an oxidant. Such method comprises allowing unsaturated triacyl glycerol to react with hydrogen peroxide in the presence of a quaternary ammonium polybasic acid hydrogen salt and at least one member selected from the group consisting of tungstic acid, heterotungstic acid, and salts thereof. | 08-19-2010 |
20110105789 | METHOD FOR PRODUCING CATALYST FOR PREPARATION OF METHACRYLIC ACID AND METHOD FOR PREPARING METHACRYLIC ACID - A method for producing a catalyst for the preparation of methacrylic acid comprising a heteropolyacid compound containing phosphorus, molybdenum and an element X selected from the group consisting of potassium, rubidium, cesium and thallium and having an atomic ratio of the element X to molybdenum of 0.5:12 to 2:12, which method comprises the steps of mixing aqueous slurry A containing starting compounds of the heteropolyacid compound in which an atomic ratio of the element X to molybdenum is from 2:12 to 4:12, and aqueous slurry B containing starting compounds of the heteropolyacid compound in which an atomic ratio of the element X to molybdenum is from 0:12 to 0.5:12 to form a slurry mixture; heat-treating the slurry mixture at a temperature of 100° C. or higher; drying the slurry mixture; and calcining the dried mixture. | 05-05-2011 |
20120065427 | Process For Producing Catalyst For Methacrylic Acid Production And Process For Producing Methacrylic Acid - An object of the present invention is to provide a process for stably producing a catalyst for methacrylic acid production exhibiting high activity and high performance. The process for producing a catalyst for methacrylic acid production of the invention is characterized in that the water content of the catalyst ingredient powder for use in molding, temperature and humidity of a molding step, humidity and temperature of a baking step are individually controlled in the case where molding is performed by a coating method using an Mo—V—P—Cu-based hetero polyacid as an active ingredient and water or an alcohol and/or an aqueous solution of an alcohol as a binder. | 03-15-2012 |
20140031584 | Ozonolysis Operations for Generation of Reduced and/or Oxidized Product Streams - The present invention relates to methods for safe and efficient use of hydrogen and oxygen in ozonolysis operations. The invention also relates to an ozonolysis process involving elements of both reductive and oxidative ozonolysis which are integrated in a continuous process. In one embodiment, the ozonolysis process of the present invention uses hydrogen and/or oxygen generated from water and electricity, which may be recycled to generate water and/or electricity. | 01-30-2014 |
20140316160 | Catalyst For Methacrylic Acid Production And Process For Producing Methacrylic Acid - There is provided a hetero polyacid-based catalyst for methacrylic acid production, which is more excellent in performance, life and moisture absorption during storage, the catalyst being a catalyst for methacrylic acid production, wherein a proton is replaced so as to satisfy conditions of α=A+(B×C) and 0.5≦α≦1.4 when the atomic ratio of the alkali metal atom relative to | 10-23-2014 |
20160145182 | Processes for Making Azelaic Acid and Derivatives Thereof - Methods of making azelaic acid, or derivatives thereof, from unsaturated monobasic acids or esters are disclosed herein. In some embodiments, the unsaturated monobasic acids or esters are C | 05-26-2016 |
562525000 | Of oxy acid or ester | 2 |
20120149939 | Recovery of Acetic Acid from Heavy Ends in Vinyl Acetate Synthesis Process - Recovery of acid, and in particular acetic acid, in a vinyl acetate production process. Vinyl acetate production produces heavy ends that comprise acetate containing compounds, such as monomers and polymers. Acid preferably is recovered by hydrolyzing the heavy ends and separating the resulting hydrolyzed stream to recover acid formed from the from acetate containing compounds. | 06-14-2012 |
20130131379 | METHOD FOR PREPARING CARBOXYLIC ACIDS BY OXIDATIVE CLEAVAGE OF A VICINAL DIOL - The present invention relates to a method for preparing carboxylic acids, in particular mono- and dicarboxylic acids, by oxidative cleavage of a vicinal diol. | 05-23-2013 |