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:
Oct. 26, 1993
Filed:
Jul. 15, 1992
Jawed M Sarkar, Naperville, IL (US);
Martha R Finck, Countryside, IL (US);
Nalco Chemical Company, Naperville, IL (US);
Abstract
A method of controlling pitch deposits in a pulp and papermaking process comprising adding lipase and a cationic polymer to a cellulosic slurry in amounts effective for diminishing pitch deposits from the cellulosic slurry in a pulp and/or paper mill. The method may include adding lipase and a cationic polymer to a cellulosic slurry in amounts effective for both reducing the triglyceride content of a cellulosic slurry by hydrolysis and diminishing the concentration of fatty acids released by the hydrolysis in the aqueous phase of a cellulosic slurry. The triglyceride hydrolysate content of the aqueous phase of a cellulosic slurry, formed by the action of lipase on triglyceride within the cellulosic slurry, is reduced when the amount of lipase and the amount of a cationic polymer is maintained for a time period sufficient to hydrolyze at least some of the triglyceride in the cellulosic slurry and reduce the triglyceride hydrolysate in the aqueous phase of the cellulosic slurry.