Claims
- 1. A method for inhibiting the formation and deposition of silica and silicate compounds in water systems comprising adding to the water in the water system an effective amount of a polyaminoamide or polyetheramide condensation polymer obtained by the polymerization of:i) at least one carbonyl compound of formula wherein R1 is selected from linear, cyclic or branched C1-C8 alkylene groups, aromatic groups, polycyclic groups and heterocyclic groups; Z and Z′ are independently selected from halogen, —OH, —OR2, and OC(O)R2; and R2 is selected from linear, cyclic or branched C1-C8 alkyl groups, aromatic groups, polycyclic groups or heterocyclic groups, with ii) at least one polyamine of formula H2N—L—NH2 wherein L is any combination of linear, cyclic or branched C2-C8 alkylene groups, aromatic groups, polycyclic groups and heterocyclic groups, where at least one of the alkylene, aromatic, polycyclic and heterocyclic groups are connected through NH or O, said polymer utilizing secondary amine and/or ether and amide functionality incorporated into the backbone of said polymer to inhibit said formation and deposition of said silica and silicate scale.
- 2. The method of claim 1 wherein R1 is selected from linear, cyclic or branched C4-C8 alkylene groups and aromatic groups.
- 3. The method of claim 1 wherein the carbonyl compounds are selected from the group consisting of: adipic acid; sebacic acid; terephthalic acid and combinations thereof.
- 4. The method of claim 1 wherein the polyamines are selected from the group consisting of polyamines of formulaH2NR3NH2, H2N—R3—NH—R4—NH2, whereinR3 and R4 are independently selected from linear, cyclic or branched C2-C8 alkylene groups, aromatic groups, polycyclic groups and heterocyclic groups; R5 and R6 are independently selected from hydrogen and methyl; R7, R8, R9, R10, R13 R14, R15, R16 and R17 are independently selected at each occurrence from hydrogen and C1-C4 alkyl; R11 and R12 are C1-C4 alkylene; x is an integer of from 1 to about 10; x′ is an integer of from about 2 to about 5; y and y′ are independently integers of from about 2 to about 58. p is an integer of from 0 to about 8; the sum of a+c is from about 2 to about 8; b is an integer of from about 2 to about 50, provided that the polyamine of formula H2NR3NH2, is always used in a mixture that contains at least one additional polyamine other than H2NR3NH2.
- 5. The method of claim 3 wherein the polyamine compound is diethylenetriamine or 4,7,10-trioxa-1,13-tridecane diamine.
- 6. The method of claim 3 wherein the polyamine has formulaH2N—R3—NH—R4—NH2, Wherein R3 and R4 are independently selected from linear, cyclic or branched C2-C8 alkylene groups, aromatic groups, polycyclic groups and heterocyclic groups.
- 7. The method of claim 3 wherein the polyamine has the formula whereinR5 and R6 are independently selected from hydrogen and methyl; and p is an integer of from 0 to about 8.
- 8. The method of claim 3 wherein the polyamine has formula whereinR7, R8 and R9 are independently selected from hydrogen and C1-C4 alkyl; the sum of a+c is from about 2 to about 8; and b is an integer of from about 2 to about 50.
- 9. The method of claim 3 wherein the polyamine has the formula whereinR10 is selected from hydrogen and C1-C4 alkyl; R11 and R12 are C1-C4 alkylene; and x is an integer of from 1 to about 10.
- 10. The method of claim 3 wherein the polyamine has the formula whereinR13 and R14 are independently selected from hydrogen and C1-C4 alkyl; and x′ is an integer of from about 2 to about 5.
- 11. The method of claim 3 wherein the polyamine has formula whereinR15, R16 and R17 are independently selected at each occurrence from hydrogen and C1-C4 alkyl; and y and y′ are independently integers of from about 2 to about 58.
- 12. The method of claim 3 wherein the polyamine is a mixture of diamines of formula and triamines of formula R13, R14, R15, R16 and R17 are independently selected at each occurrence from hydrogen and C1-C4 alkyl; x′ is an integer of from about 2 to about 5; and y and y′ are independently integers of from about 2 to about 58.
- 13. The method of claim 1 wherein the water system is selected from the group consisting of: cooling waters; geothermal waters; salt water for desalinization purposes; industrial waters being prepared for boiler treatment and steam generation; downhole waters for petroleum crude recovery; pulp and paper mill waters; and mining and mineral processing waters.
- 14. The method of claim 1 wherein the polymer is combined with an effective amount of a second water treating agent.
- 15. The method of claim 14 wherein the second water treating agent is selected from the group consisting of: polymer scale control dispersants; metal chelating agents; corrosion inhibitors; microbiocides; flocculants; coagulants; oxygen scavengers; neutralizing amines; and scale inhibitors.
CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation-in-part of U.S. Ser. No. 09/261,821, filed Mar. 3, 1999, now U.S. Pat. No. 6,153,106.
US Referenced Citations (14)
Non-Patent Literature Citations (2)
Entry |
Dubin et al., Deposit Control in High Silica Water, Materials Performance. pp. 27-33 (1985). |
Gill, Silica Scale Control, Corrosion 98, Paper No. 226 (1998). |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09/261821 |
Mar 1999 |
US |
Child |
09/699672 |
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US |