Method for inhibiting the formation and deposition of silica scale in aqueous systems
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C02F-005/10
C02F-005/14
C02F-005/04
C02F-103/02
출원번호
US-0976013
(2010-12-22)
등록번호
US-9221700
(2015-12-29)
발명자
/ 주소
Greene, Nathaniel T.
Gill, Jasbir S.
Godfrey, Martin R.
Williams, Cheryl
출원인 / 주소
Ecolab USA Inc.
대리인 / 주소
Brinks Gilson & Lione
인용정보
피인용 횟수 :
1인용 특허 :
23
초록▼
This invention relates to an improved method for inhibiting the formation and deposition of silica and silicate compounds in a water system. In particular, the method includes adding to the water system a relatively low molecular weight organic, anionic polymer. The polymer preferrably has an acryli
This invention relates to an improved method for inhibiting the formation and deposition of silica and silicate compounds in a water system. In particular, the method includes adding to the water system a relatively low molecular weight organic, anionic polymer. The polymer preferrably has an acrylic acid or methacrylic acid functionality and is preferrably selected from one or more of homopolymers of acrylic acid, a methacrylic acid/polyethylene glycol allyl ether copolymer, a homopolymer of methacrylic acid, an acrylic acid/polyethylene glycol allyl ether copolymer, and an acrylic acid/1-allyloxy-2-hydroxypropane sulfonic acid copolymer, homopolymers of maleic anhydride, copolymers of maleic anhydride and polyethylene glycol allyl ether, and combinations thereof.
대표청구항▼
1. A method for inhibiting the formation and deposition of silica and silicate compounds in a water system, the method comprising adding to the water in the water system about 10,000 ppm to about 100,000 ppm of one or more low molecular weight anionic polymers selected from the group consisting of:
1. A method for inhibiting the formation and deposition of silica and silicate compounds in a water system, the method comprising adding to the water in the water system about 10,000 ppm to about 100,000 ppm of one or more low molecular weight anionic polymers selected from the group consisting of: homopolymers of acrylic acid; copolymers of methacrylic acid and polyethylene glycol allyl ether; homopolymers of methacrylic acid; copolymers of acrylic acid and polyethylene glycol allyl ether; copolymers of acrylic acid and 1-allyloxy-2-hydroxypropane sulfonic acid; homopolymers of maleic anhydride; copolymers of maleic anhydride and polyethylene glycol allyl ether; and combinations thereof. 2. The method of claim 1, wherein the one or more low molecular weight polymers have a weight average molecular weight of about 5,000 Da to about 200,000 Da. 3. The method of claim 1, wherein the one or more low molecular weight polymers are copolymers of methacrylic acid and polyethylene glycol allyl ether having average molecular weights of from about 5,000 to about 7,000 Da. 4. The method of claim 1, wherein the one or more low molecular weight polymers are copolymers of acrylic acid and polyethylene glycol allyl ether having an average molecular weight of from about 5,000 to about 7,000 Da. 5. The method of claim 1, wherein the one or more low molecular weight polymers are copolymers of acrylic acid and 1-allyloxy-2-hydroxypropane sulfonic acid having an average molecular weight of about 32,000 Da. 6. The method of claim 1, wherein the one or more low molecular weight anionic polymers comprise water soluble homo-polymers and co-polymers utilizing carboxylated and alkoxylated monomers. 7. The method of claim 6, wherein the one or more low molecular weight polymers comprise propoxy, ethoxy, hydroxy substituted alkyl chains, and combinations thereof. 8. The method of claim 7, wherein the one or more low molecular weight polymers comprise an average substitution ranges from about 4 to about 20 mole percent. 9. The method of claim 1, wherein the water system is selected from cooling water systems, geothermal water systems, salt water desalinization systems, boiler water systems, downhole water systems for petroleum crude recovery, pulp and paper mill water systems and mining and mineral processing water systems. 10. The method of claim 1, wherein the water system is a cooling water system. 11. The method of claim 1, further comprising adding one or more additional corrosion inhibitors, scale inhibitors, or dispersants to the water system. 12. The method of claim 11, wherein the scale inhibitors or dispersants are selected from the group consisting of: inorganic and organic polyphosphates, phosphonates, polycarboxylates, and combinations thereof. 13. The method of claim 1, wherein the one or more low molecular weight polymers have a weight average molecular weight of about 200,000 Da. 14. The method of claim 1, further comprising the step of adding an inert fluorescent tracer to the water in the water system.
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이 특허에 인용된 특허 (23)
Cha Charles Y. (Bethel Park PA), Controlling silica/silicate deposition using phosphonate combinations.
Buentello, Kristin E.; Kessler, Stephen M.; May, Roger C.; Kaechelin, Julie A.; Chen, Fu; Kolson, Natalie A., Method for controlling scale formation and deposition in aqueous systems.
Gill Jasbir S. (McKees Rocks PA) Rey Susan P. (Coraopolis PA) Wiernik John H. (Pittsburgh PA), Method for controlling silica/silicate deposition in aqueous systems using 2-phosphonobutane tricarboxylic acid-1,2,4 an.
Gill Jasbir S. (Corapolis PA) Rey Susan P. (Corapolis PA) Wiernik John H. (Pittsburgh PA), Method for controlling silica/silicate deposition in aqueous systems using phosphonates and carboxylic/sulfonic polymers.
Nicholas Paul Peter (Broadview Heights OH) Amjad Zahid (Brecksville OH), Method for inhibiting the deposition of silica and silicate compounds in water systems.
Sherwood Steven P. (The Woodlands TX) Nguyen Truc K. (Houston TX) McDaniel Cato R. (The Woodlands TX), Method of controlling silica deposition in aqueous systems.
Barnett Daniel J. (Jacksonville FL) Khan Abdul Q. (Jacksonville FL) Keen Patricia R. (Jacksonville FL), Press felt conditioner for neutral and alkaline papermaking systems.
Patel Suresh (37 Lawnswood Park Road Swinton ; Manchester M27 1NJ GB2), Treatment of seawater evaporator aqueous systems with scale-inhibiting mixture of polymaleic anhydride and a carboxyl-co.
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