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. 10, 1978
Filed:
Jan. 08, 1974
Applicant:
Inventors:
Howard Vincent Hess, Glenham, NY (US);
William Francis Franz, Gardiner, NY (US);
Edward Lawrence Cole, Fishkill, NY (US);
Assignee:
Texaco Inc., New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 31 ; 201 17 ; 201 25 ; 423207 ; 423461 ;
Abstract
An improved process for treating spent Kraft wood pulping liquors by coking the liquors after reducing the pH thereof with SO.sub.2 and recovering the sulfur contained in the resulting coke by contact with hydrogen preheated to temperatures in the range of 750.degree. to 2000.degree. F to produce H.sub.2 S. The H.sub.2 S and lime are added to the coker effluent to form new kraft cooking liquor.