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. 17, 1989
Filed:
May. 26, 1988
Applicant:
Inventors:
Reinhardt Grade, Bensheim, DE;
Brien M Thomas, Stockport, GB;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210697 ; 210699 ; 210700 ; 210701 ; 210755 ; 210764 ; 71 67 ; 252180 ; 422 15 ; 422 28 ; 422 17 ; 514129 ; 514139 ;
Abstract
A process for treating water which comprises adding to the water (a) from 1 to 50 ppm of a phosphonium compound of the formula: ##STR1## in which R represents C.sub.1 -C.sub.6 groups which are unsubstituted or substituted by a cyano, hydroxy, esterified hydroxy or aryl group, R.sub.1 represents a C.sub.8 -C.sub.18 alkyl group and X represents chlorine or bromine, and optionally (b) from 0.1 to 100 ppm of an anionic water treatment agent such as a scale or corrosion inhibiting agent.