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:
Jun. 24, 1980
Filed:
Sep. 18, 1978
Applicant:
Inventors:
Norbert Berlenbach, Wiesbaden-Dotzheim, DE;
Ferdinand Klegraf, Wiesbaden, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02B / ; C02B / ;
U.S. Cl.
CPC ...
210 46 ; 210 53 ;
Abstract
Water having calcium compounds therein is softened by admixing an alkaline precipitating agent and finely divided crystalline calcium carbonate therewith in a mixing zone prior to the addition of a flocculating agent containing trivalent metal ions whereupon the calcium compounds are then changed inside a reaction zone into calcium carbonate. At least a part of the calcium carbonate newly precipitated from the water in the reaction zone prior to addition of the flocculation agent is immediately withdrawn and recycled to the mixing zone.