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:
Aug. 21, 1984
Filed:
Jan. 16, 1980
Ryo Matsuura, Yamato, JP;
Kazuya Nagaoka, Yokohama, JP;
Kouji Kusabe, Kamakura, JP;
Shuichi Nakatani, Yokohama, JP;
Kawasaki Kasei Chemicals Ltd., Tokyo, JP;
Abstract
p-n-Alkylbenzoic acids having high purity without containing isomers are important as intermediates for liquid crystals. The p-n-alkylbenzoic acid is produced by reacting a p-formylbenzoic acid or its ester with a ketone having the formula ##STR1## wherein R represents a C.sub.1 -C.sub.18 n-alkyl or n-alkenyl group in the presence of a basic catalyst to obtain an unsaturated ketone compound having the formula ##STR2## wherein R is defined above and X represents hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, and then, hydrogenating and reducing the unsaturated ketone compound to obtain the p-n-alkylbenzoic acid having the formula ##STR3##