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:
May. 19, 1981
Filed:
Sep. 18, 1979
Applicant:
Inventor:
Inge G Mansson, Kungalv, SE;
Assignee:
EKA Aktiebolag, Surte, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 29 ; 162 / ; 162 / ; 162D / ; 210651 ;
Abstract
A method for cleaning effluents from bleaching plants which use ultrafiltration for cleaning, preferably after the first extraction stage, by dividing the ultrafiltration into two stages, and between them inserting an alkali treatment stage. The high molecular chlorine compounds are thereby split into innocuous sodium chloride in the permeate from the second ultrafiltration stage, which can be returned to the extraction stage so that with the alkali excess after the splitting, it can cover all or part of its alkali requirement.