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. 02, 1990
Filed:
Dec. 22, 1988
Applicant:
Inventor:
Emmanuel Arretz, Pau, FR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568 72 ;
Abstract
The invention relates to the synthesis of tertiary mercaptans from isobutylene homopolymers and from hydrogen sulphide by means of heterogeneous catalysis. In the processs according to the invention, the reaction is carried out at a temperature below 45.degree. C., preferably between 0.degree. and 35.degree. C., in the presence of a catalyst consisting of a dry cation exchange resin. Excellent yields of tertiary mercaptan are thus obtained, while the formation of undesirable byproducts is virtually avoided.