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. 16, 1996
Filed:
Dec. 27, 1994
Yasushi Shiomi, Ube, JP;
Hiroyuki Fukushima, Ube, JP;
Toshihiko Sumida, Ube, JP;
Shinichi Furusaki, Ube, JP;
UBE Industries, Ltd., Yamaguchi, JP;
Abstract
A diol compound, for example, hexanediol, is produced with a high efficiency by esterifying a carboxylic acid mixture, collected from a reaction product mixture of a liquid phase oxidation of cyclohexane, with an esterifying agent and hydrogenate-decomposing the resultant esterification product mixture with hydrogen. The hydrogenate-decomposition is carried out by using a specific catalyst free from chromium and including a member selected from (A) copper and zinc-containing catalytic materials which are prepared by mixing an aqueous solution of water-soluble copper and zinc salts with an aqueous alkali metal or ammonium carbonate or alkali metal or ammonium hydrogen carbonate solution, reducing the resultant precipitate comprising a basic copper and zinc carbonate mixture with hydrogen and partially oxidizing the resultant reduction product with an oxygen-containing gas, and (B) copper and zinc-containing catalytic materials which are prepared by conducting the same mixing procedure as that for the catalytic material (A) except that the mixing is carried out at a temperature of 60.degree. to 95.degree. C. at a pH of 6.5 to 9.0, and by calcining the resultant precipitate at a temperature of 300.degree. C. to 450.degree. C.