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:
Jan. 20, 1976
Filed:
Aug. 21, 1974
Kunio Hanauye, Nagoya, JA;
Tsutomu Takase, Nagoya, JA;
Mitsuhiro Iwasa, Tokai, JA;
Mizuo Ito, Nagoya, JA;
Mitsui Toatsu Chemicals, Incorporated, Tokyo, JA;
Abstract
2,6-DI-TERT.-BUTYL-4-CUMYL PHENOL IS PRODUCED BY REACTING P-CUMYL PHENOL WITH ISOBUTYLENE, AT A REACTION TEMPERATURE OF FROM 40.degree. TO 120.degree.C. in the presence of from 0.01 to 20% by weight of p-toluene sulfonic acid based on the weight of the p-cumyl phenol. Isobutylene is charged into the reaction system at a high rate and is always present in the reaction system during the reaction. A substantially 100% conversion of p-cumyl phenol is attained and the weight ratio of 2,6-di-tert.-butyl-4-cumyl phenol/2-tert.-butyl-4-cumyl phenol in the reaction product is greater than 10, while splitting off of the cumyl group at the para position is suppressed.