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. 27, 1978
Filed:
Apr. 22, 1977
Applicant:
Inventors:
Assignee:
Kao Soap Co., Ltd., Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; B01J / ; F28D / ;
U.S. Cl.
CPC ...
23283 ; 23284 ; 23285 ; 23260 ; 2605 / ; 2604 / ; 165130 ; 165141 ; 165140 ; 261146 ;
Abstract
A sulfonation apparatus comprising a plurality of vertical first-stage reaction tubes in which the sulfonatable material and an SO.sub.3 -containing gas are flowed upwardly from the lower ends thereof and a single vertical second-stage reaction tube in which the reaction products from the upper ends of all of the first-stage reaction tubes are combined and are flowed downwardly together with fresh SO.sub.3 -containing gas in order to complete the sulfonation reaction.