Patent EP0133210A2 successfully refreshed from Google Patents.
EP0133210A2
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Novel scale inhibiting copolymer and method for inhibiting scale deposition
Assignee: Goodrich Corp
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Filing: 1984-06-23
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Granted: —
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Expires: 2004-06-23
Abstract
Abstract Water-soluble copolymers are useful in treating industrial process water in threshold inhibition amounts. Such copolymers are selected from copolymers of an acrylic acid, an acrylamide, and an alkoxyalkyl acrylate ester; and copolymers of an acrylic acid or a salt thereof, a lower alkenyl carboxylate, and optionally a salt of a lower alkenyl sulfonate.
Inventors
- 👤 William Frank Masler Iii
- 👤 Zahid Amjad
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:32
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10; A; A23; A23B; A23B70/00; A23B70/30; A23C; A23C9/00; A23C9/152; C02F5/12
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
271 words
A method for inhibiting the deposition of scale due particularly to calcium phosphate, zinc phosphate and magnesium phosphate formed in a system for treating process water, comprising, adding to said process water from 1 part per million (ppm) to about 200 ppm of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an a, S -monoolefinically unsaturated ester are essential components, said copolymer being represented by wherein, A represents B represents an ester selected from the group consisting of C represents D represents X is selected from the group consisting of H, NH 4 , an alkali metal, an alkaline earth metal, and zinc; X' is selected from NH4, an alkali metal, an alkaline earth metal and zinc; a represents an integer in the range from 1 to about 19; b represents an integer in the range from 0.075 to 1; c represents an integer in the range from 0 to 1; d represents an integer in the range from 0 to 1; except that when d ≠ 0, c = 0; and when c ≠ 0, d = 0; and, c or d may each be 0 (i.e. c may be equal to d = 0); R represents H, or methyl; R represents H, methyl or ethyl; R 3 represents lower alkyl having from 2 to about 4 carbon atoms; R 4 represents lower alkyl having from 1 to about 10 carbon atoms; n' is either 0 or I; n" is an integer in the range from 2 to about 6; and, m is an integer in the range from about 3 to about 70.
Claim 2
Independent Claim
271 words
A method for inhibiting the deposition of scale due particularly to calcium phosphate, zinc phosphate and magnesium phosphate formed in a system for treating process water, comprising, adding to said process water from 1 part per million (ppm) to about 200 ppm of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an a, S -monoolefinically unsaturated ester are essential components, said copolymer being represented by wherein, A represents B represents an ester selected from the group consisting of C represents D represents X is selected from the group consisting of H, NH 4 , an alkali metal, an alkaline earth metal, and zinc; X' is selected from NH4, an alkali metal, an alkaline earth metal and zinc; a represents an integer in the range from 1 to about 19; b represents an integer in the range from 0.075 to 1; c represents an integer in the range from 0 to 1; d represents an integer in the range from 0 to 1; except that when d ≠ 0, c = 0; and when c ≠ 0, d = 0; and, c or d may each be 0 (i.e. c may be equal to d = 0); R represents H, or methyl; R represents H, methyl or ethyl; R 3 represents lower alkyl having from 2 to about 4 carbon atoms; R 4 represents lower alkyl having from 1 to about 10 carbon atoms; n' is either 0 or I; n" is an integer in the range from 2 to about 6; and, m is an integer in the range from about 3 to about 70.
Claim 3
Dependent Claim
131 words
The method of claim 1 wherein said copolymer has the structural formula wherein, R 1 represents H, or methyl; R 2 represents H, methyl or ethyl; X is selected from the group consisting of H, NH 4 , an alkali metal, an alkaline earth metal and zinc; n' is either 0 or 1; X' is selected from the group consisting of NH 4 , an alkali metal, an alkaline earth metal and zinc; z' is a number in the range from 0 to about 1.0; m is an integer in the range from about 3 to about 70; and, for each y (that is, y = 1) x' is a number in the range from about 1 to about 19; and, x', y and z' are present in relative heterogeneous order.
Claim 4
Dependent Claim
134 words
The method of claim 1 wherein said copolymer has the structural formula wherein, X represents H, or NH 4 , or an alkali metal selected from the group consisting of sodium and potassium; R represents H, or methyl; R 3 represents lower alkyl having from 2 to about 4 carbon atoms; R4 represents lower alkyl having from 1 to about 10 carbon atoms; n" is an integer in the range from 2 to about 6; m is an integer in the range from about 3 to about 70; and, for each y (that is, y = 1) x" is an integer in the range from about 1 to about 8, and z" is a number in the range from 1 to about 0.075; and x", y and z" are present in relative heterogeneous order.
Claim 5
Dependent Claim
43 words
The method of claim 1 wherein said process water is used in a system selected from steam generating system,recirculating cooling water system, and gas scrubbing system, or wherein said process water is circulated in a process for recovering crude petroleum including hydrocarbon gases.
Claim 6
Dependent Claim
44 words
The method of claim 2 wherein X represents NH 4 , N a or K; R 1 and R each represent H; and wherein X' is a number in the range of about 2.5 to 15.0, y = 1.0, and z 1 = 0.
Claim 7
Dependent Claim
64 words
The method of claim 5 wherein said copolymer is subjected to hydrolytic conditions prior to, or during use in said process water, so as to form a copolymer having the formula wherein, R 1 and R 2 each represent H; X represents Na; x', y, m and n' have the same connotation as that given; p is a number less than y; and, y'=y-p.
Claim 8
Dependent Claim
43 words
The method of claim 6 wherein said water contains from about 2 ppm to about 20 ppm of said copolymer, n' = 0; p is in the range from 0.01 to about 0.5 when y is in the range from 0.5 to 0.99.
Claim 9
Dependent Claim
43 words
The method of claim 2 wherein z' is greater than 0 and is represented by z"' in the range from 0.1 to 1.0 in a copolymer having the structural formula wherein, y' = y - p, and z''' is specified for each y.
Claim 10
Dependent Claim
26 words
Method of claim 8 wherein said process water is used in a system selected from steam generating system, recirculating cooling water system, and gas scrubbing system.
Claim 11
Dependent Claim
50 words
Method of claim 9 wherein X represents NH 4 , Na or K; R 1 and R 2 each represents H ; R 3 represents CH 2 -CH 2 ; and wherein X' is a number in the range of about 2.5 to 15.0 times the amount of y present.
Claim 12
Independent Claim
68 words
A method for inhibiting the deposition of scale due particularly to calcium phosphate formed in a system for pasteurizing milk, comprising, adding to said milk from 0.05 part per million (ppm) to about 10 ppm of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an αβ-monoolefinically unsaturated ester are essential components, said copolymer being represented by the structure (I) as defined hereinabove.
Claim 13
Independent Claim
68 words
A method for inhibiting the deposition of scale due particularly to calcium phosphate formed in a system for pasteurizing milk, comprising, adding to said milk from 0.05 part per million (ppm) to about 10 ppm of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an αβ-monoolefinically unsaturated ester are essential components, said copolymer being represented by the structure (I) as defined hereinabove.
Claim 14
Independent Claim
16 words
The method of claim llwherein said copolymer is represented by the structure (II) as defined hereinabove.
Claim 15
Dependent Claim
35 words
The method of claim 12 wherein z' is greater than 0 and is represented by z" in the range from 0.1 to 1.0 in a copolymer having the structure represented by (V) as defined hereinabove.
Claim 16
Dependent Claim
87 words
14 . A method for inhibiting the deposition of scale due particularly to calcium carbonate, calcium phosphate, calcium oxalate and magnesium silicate formed in a system for processing fruit juice, comprising, adding to said juice from 0.05 part per million (ppm) to about 10 ppm of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an α,β-monoolefinically unsaturated ester are essential components, optionally after said copolymer is subjected to hydrolytic conditions, said copolymer being represented by the structure (I) as defined hereinabove.
Claim 17
Dependent Claim
87 words
14 . A method for inhibiting the deposition of scale due particularly to calcium carbonate, calcium phosphate, calcium oxalate and magnesium silicate formed in a system for processing fruit juice, comprising, adding to said juice from 0.05 part per million (ppm) to about 10 ppm of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an α,β-monoolefinically unsaturated ester are essential components, optionally after said copolymer is subjected to hydrolytic conditions, said copolymer being represented by the structure (I) as defined hereinabove.
Claim 18
Dependent Claim
17 words
The method of claim 14 wherein said copolymer is represented by the structure (III) as defined hereinabove.
Claim 19
Dependent Claim
101 words
A composition for treating a predominantly aqueous stream to inhibit the deposition of precipitates selected from the group consisting of calcium phosphate, magnesium phosphate, zinc phosphate, calcium silicate, magnesium silicate, calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride, magnesium hydroxide, calcium oxalate, zinc hydroxide, iron oxide and mixtures thereof, said composition comprising an effective amount for the purpose, of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an α,β-moncolefinic- ally unsaturated ester are essential components, optionally after said copolymer is subjected to hydrolytic conditions, said copolymer being represented by the structure (I) as defined hereinabove.
Claim 20
Dependent Claim
101 words
A composition for treating a predominantly aqueous stream to inhibit the deposition of precipitates selected from the group consisting of calcium phosphate, magnesium phosphate, zinc phosphate, calcium silicate, magnesium silicate, calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride, magnesium hydroxide, calcium oxalate, zinc hydroxide, iron oxide and mixtures thereof, said composition comprising an effective amount for the purpose, of a water-soluble essentially non-crosslinked random copolymer in which acrylic acid or methacrylic acid, and an α,β-moncolefinic- ally unsaturated ester are essential components, optionally after said copolymer is subjected to hydrolytic conditions, said copolymer being represented by the structure (I) as defined hereinabove.
Claim 21
Dependent Claim
17 words
The composition of claim 16 wherein said copolymer is represented by the structure (III) as defined hereinabove.
Claim 22
Dependent Claim
30 words
18 . The composition of claim 17 wherein R represents H ; R 3 represents CH 2 -CH 2 ('ethyl'); and, R 4 represents CH 3 -CH 2 - ('ethyl').
Claim 23
Dependent Claim
26 words
The composition of claim 18 wherein said aqueous stream is selected from process water used in a recirculating water system and milk prior to being pasteurized.
Claim 24
Dependent Claim
50 words
Composition of claim 18 wherein said copolymer has molecular weight in the range of about 2,000 to 50,000, said composition being in an aqueous solution having pH in the range of about 5 to 8 with total solids content in the range of about 2 to 60 percent by weight.
Claim 25
Dependent Claim
17 words
The method of claim 20 wherein said copolymer is represented by the structure (II) as defined hereinabove.
Claim 26
Dependent Claim
34 words
The method of claim 21 wherein z' is greater than 0 and is represented by z" in the range from 0.1 to 1.0 in a copolymer represented by the structure (V) as defined hereinabove.
Claim 27
Dependent Claim
102 words
The method of claim 16 wherein said copolymer is represented by the structure (II) as defined hereinabove, wherein X represents NH 4 , Na or K; R 1 and R 2 each represents H; X' is a number in the range of about 1.01 to 3.5 and z l =0; wherein said composition has weight average molecular weight in the range of about 1,000 to 25,000; and wherein said aqueous stream contains a major amount of water by weight and includes process water in a recirculating water system, animal's milk, fruit juice, brine, brackish water, and water containing petroleum and hydrocarbon gases.
Claim 28
Dependent Claim
68 words
The composition of claim 2 3 which has been subjected to hydrolytic conditions prior to, or during use in said aqueous stream, so as to form a copolymer represented by the structure (V) as defined hereinabove, wherein, y' = y - p, where p is in the range from about 0.1 to about 0.5; and, z" is a number in the range from about 0.1 to about 0.9.
Claim 29
Dependent Claim
77 words
2 5 . A method for forming a copolymer of (i) acrylic acid or methacrylic acid, (ii) acrylamide or acrylamide, and (iii) an alkoxyalkyl (meth)acrylate ester comprising, reacting preselected amounts of each of the foregoing in water as the only solvent for them, at a temperature in the range from about 30°C to the reflux temperature of the solution, so as to form an aqueous solution of a copolymer represented by the structure (III) as defined hereinabove.
Claim 30
Dependent Claim
77 words
2 5 . A method for forming a copolymer of (i) acrylic acid or methacrylic acid, (ii) acrylamide or acrylamide, and (iii) an alkoxyalkyl (meth)acrylate ester comprising, reacting preselected amounts of each of the foregoing in water as the only solvent for them, at a temperature in the range from about 30°C to the reflux temperature of the solution, so as to form an aqueous solution of a copolymer represented by the structure (III) as defined hereinabove.
References Cited (Backward Citations)
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