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:
Aug. 31, 1982
Filed:
Jul. 14, 1980
Applicant:
Inventor:
Dominic S Rende, Woodridge, IL (US);
Assignee:
Nalco Chemical Company, Oak Brook, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ; D21C / ;
U.S. Cl.
CPC ...
162 79 ; 162 83 ;
Abstract
The addition of catalytic amounts of molybdenum introduced as a water-soluble molybdenum compound to the sulfite-pulping liquors, substantially increases the rate of lignin removal during chip digestion. By the use of this catalyst, the time required to delignify softwood chips in sulfite liquor at a maximum pulping temperature of 135.degree. C. is reduced to approximately 75% of that necessary to remove the same amount of lignin without a catalyst.