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:
Apr. 21, 1998
Filed:
Jan. 03, 1997
Applicant:
Inventors:
Ulf Germgang.rd, Sundsbruk, SE;
Solveig Norden, Njurunda, SE;
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C / ;
U.S. Cl.
CPC ...
162 37 ; 162 65 ; 162 78 ; 162D / ;
Abstract
Methods of treating process water containing metal ions is disclosed including contacting the process water with a pulp comprising lignocellulose-containing material at a pH of above about 7 and a temperature of from about 50.degree. to 120.degree. C. whereby at least a portion of the metal ions are removed from the process water. Preferably the process water is produced from initially washing a pulp solution prior to a bleaching step employing hydrogen peroxide or ozone.
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Germgang.rd, Ulf. (1998). Method of removing metal ions dissolved in the bleach plant waste water (U.S. Patent No. 5741398). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5741398
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