Title:
METHODS OF PREVENTING SCALING INVOLVING INORGANIC COMPOSITIONS, AND COMPOSITIONS THEREFOR
Document Type and Number:
WIPO Patent Application WO2000076922
Kind Code:
A3
Abstract:
Methods for inhibiting scale deposits in an aqueous system. The method may include at least one of adding and forming anti-scalant in the aqueous system such that an amount of anti-scalant in the aqueous system is up to about 1000 ppm, wherein the anti-scalant comprises at least one or polyvalent metal silicate and polyvalent metal carbonate, wherein the aqueous system has a pH of at least about 9, and wherein a mean particle size of the anti-scalant is less than about 3 microns. The method includes at least one of adding and forming anti-scalant in the aqueous system, wherein the anti-scalant comprises at least one of polyvalent metal silicate and polyvalent metal carbonate, and adding copolymer of maleic anhydride and isobutylene. Compositions therefor.
Inventors:
FADER MITZI K
NGUYEN DUY T
WANG XIANG HUAI
ZHANG FUSHAN
LING TIEN-FEING
NGUYEN DUY T
WANG XIANG HUAI
ZHANG FUSHAN
LING TIEN-FEING
Application Number:
PCT/US2000/016493
Publication Date:
November 01, 2001
Filing Date:
June 13, 2000
Export Citation:
Assignee:
HERCULES INC (US)
International Classes:
C02F1/56; C02F5/00; F28F19/01; C02F5/08; C02F5/10; C02F5/12; C02F5/14; (IPC1-7): C02F5/00; C02F5/08
Domestic Patent References:
| WO1993017778A1 | 1993-09-16 | |||
| WO2000017442A1 | 2000-03-30 |
Foreign References:
| US5147555A | 1992-09-15 | |||
| US4671888A | 1987-06-09 | |||
| US5772893A | 1998-06-30 | |||
| GB2152919A | 1985-08-14 | |||
| DE2539110A1 | 1976-04-08 | |||
| GB1464427A | 1977-02-16 | |||
| CH602961A5 | 1978-08-15 | |||
| GB2097419A | 1982-11-03 | |||
| US4203851A | 1980-05-20 | |||
| US5312485A | 1994-05-17 | |||
| US5985424A | 1999-11-16 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 10 30 November 1995 (1995-11-30)
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 01 31 January 2000 (2000-01-31)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
DATABASE WPI Section Ch Week 199410, Derwent World Patents Index; Class A97, AN 1994-077193, XP002157656
DATABASE WPI Section Ch Week 198707, Derwent World Patents Index; Class A89, AN 1987-045723, XP002157657
DATABASE WPI Section Ch Week 197933, Derwent World Patents Index; Class A60, AN 1979-60315B, XP002157658
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 01 31 January 2000 (2000-01-31)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
DATABASE WPI Section Ch Week 199410, Derwent World Patents Index; Class A97, AN 1994-077193, XP002157656
DATABASE WPI Section Ch Week 198707, Derwent World Patents Index; Class A89, AN 1987-045723, XP002157657
DATABASE WPI Section Ch Week 197933, Derwent World Patents Index; Class A60, AN 1979-60315B, XP002157658
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