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:
Feb. 13, 1990
Filed:
Feb. 01, 1989
Brown J Michael, The Woodlands, TX (US);
Stevn P Sherwood, The Woodlands, TX (US);
E Paul Holder, Austin, TX (US);
Betz Laboratories, Inc., Trevose, PA (US);
Abstract
A method of inhibiting manganese deposition in open, recirculating aqueous systems is disclosed. A water soluble acrylic acid/allyl hydroxy propyl sulfonate ether copolymer having repeat units characterized by the structural formula: ##STR1## wherein M is a water soluble cation, the molar ratio x:y is from about 3:1 to about 6:1 and the number average molecular weight of the copolymer is from about 5,000 to about 10,000, preferrably with an organic phosphonate is added to the aqueous system. The organic phosphonate is preferably hydroxy ethylidene diphosphonic acid, diethylene triamine penta-(methylene phosphonic acid) or blends thereof. The copolymer or copolymer and phosphonic acid is effective in inhibiting the deposition of manganese in aqueous systems.