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:
Sep. 23, 1980
Filed:
May. 23, 1978
Sumio Umemura, Ube, JP;
Kanenobu Matsui, Ube, JP;
Kunitoshi Koga, Ube, JP;
Mineo Kuniyoshi, Ube, JP;
Ube Industries, Ltd., Yamaguchi, JP;
Abstract
Disclosed is a vapor phase catalytic oxidation process for preparing an aliphatic carboxylic acid ester of a monoaromatic compound having 1 to 2 hydroxymethyl substituents, such as benzyl acetate, p-methylbenzyl acetate, p-xylylenediacetate, benzyl propionate and benzyl butyrate. A gaseous feed comprised of a benzene compound having 1 to 2 methyl substituents, an aliphatic monocarboxylic acid having 2 to 4 carbon atoms and molecular oxygen is contacted with an improved catalyst. The metal ingredients of the catalyst consist essentially of (a) palladium, (b) arsenic and (c) at least one metal selected from alkali metals and alkali earth metals, and the atomic ratio of palladium:arsenic:the alkali or alkali earth metal is 1:0.05-4:0.1-10.