Title of Invention

"METHOD FOR INHIBITING SCALE FORMATION AND DEPOSITION IN MEMBRANE SYSTEMS VIA THE USE OF AN AA-AMPS

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 400C and about 800C 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.
Full Text

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=/eL9MAynrWxjjs4yQblp1Q==&loc=+mN2fYxnTC4l0fUd8W4CAA==


Patent Number 279633
Indian Patent Application Number 1365/DELNP/2011
PG Journal Number 05/2017
Publication Date 03-Feb-2017
Grant Date 27-Jan-2017
Date of Filing 24-Feb-2011
Name of Patentee NALCO COMPANY
Applicant Address 1601 W. DIEHL ROAD, NAPERVILLE, ILLINOIS 60563-1198, UNITED STATES OF AMERICA;
Inventors:
# Inventor's Name Inventor's Address
1 MUSALE, DEEPAK A. 3240 HAVERHILL DRIVE, AURORA, IL 60502, UNITED STATES OF AMERICA;
PCT International Classification Number C02F 5/12
PCT International Application Number PCT/US2009/055964
PCT International Filing date 2009-09-04
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 12/204,488 2008-09-04 U.S.A.