The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2013
Filed:
Jul. 19, 2010
Wugeng Liang, Elgin, IL (US);
David Sullivan, Sugar Land, TX (US);
James W. Kauffman, Katy, TX (US);
Clark Rea, Houston, TX (US);
Joe Linzer, Issaquah, WA (US);
Shahid Shaikh, Houston, TX (US);
Wugeng Liang, Elgin, IL (US);
David Sullivan, Sugar Land, TX (US);
James W. Kauffman, Katy, TX (US);
Clark Rea, Houston, TX (US);
Joe Linzer, Issaquah, WA (US);
Shahid Shaikh, Houston, TX (US);
Saudi Basic Industries Corporation, Riyadh, SA;
Abstract
The invention is a heteropoly acid compound catalyst composition, a method of making the catalyst composition and a process for the oxidation of saturated and/or unsaturated aldehydes to unsaturated carboxylic acids using the catalyst composition. The catalyst composition is a heteropoly acid compound containing molybdenum, vanadium, phosphorus, cesium, bismuth, copper and antimony. Thermal stability is achieved with higher cesium content (up to less than 3.0) but antimony, copper and bismuth must be present to maintain good activity. The catalyst is made by dissolving compounds of the components of each of the heteropoly acid compounds in a solution, precipitating the heteropoly acid compounds, obtaining a catalyst precursor and calcining the catalyst precursor to form a heteropoly acid compound catalyst. Unsaturated aldehydes, such as methacrolein, may be oxidized in the presence of the heteropoly acid compound catalyst to produce an unsaturated carboxylic acid, such as methacrylic acid.