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:
Mar. 17, 2015
Filed:
Sep. 04, 2008
Deepak A. Musale, Aurora, IL (US);
Deepak A. Musale, Aurora, IL (US);
Nalco Company, Naperville, IL (US);
Abstract
A method of inhibiting scale formation and deposition from a feed stream passing through a membrane system is disclosed. The method comprises: (a) controlling the pH of said feed stream within the range between about 7.0 and about 8.2; (b) optionally controlling the temperature of said feed stream within the range between about 5° C. to about 40° C. when the membrane system is an RO system, a NF system, an ED system, an EDI system or a combination thereof; (c) optionally controlling the temperature of said feed stream within the range between about 40° C. and about 80° C. when the membrane system is an MD system; and (d) adding an effective amount of a scale inhibitor to said feed stream, said scale inhibitor comprises an AA-AMPS copolymer.