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:
Jun. 28, 1983
Filed:
Sep. 28, 1981
Applicant:
Inventors:
Fusao Kondo, Chiba, JP;
Toshimi Terao, Chiba, JP;
Katsumasa Nagano, Ichikawa, JP;
Kyozo Kitano, Chiba, JP;
Assignee:
Lion Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ; 2605 / ;
Abstract
Alkylbenzene is sulfonated in a thin film type sulfonation process by adding 2 through 20 parts by weight, based on 100 parts by weight of said alkylbenzene, of alkylbenzene sulfonic acids having alkyl groups of 1 through 20 carbon atoms and/or benzene sulfonic acids to the alkylbenzene prior to the contact thereof with diluted gaseous sulfur trioxide. The addition of alkylbenzene sulfonic acids and/or benzenesulfonic acid effectively prevents the formation of adherent deposits on the surface of a reaction wall.