Claims
- 1. Method of suspending sediment in cooling water systems that comprises adding thereto 2-phosphonobutane-1,2,4-tricarboxylic acid and a copolymer of methacrylic acid and 2-acrylamido-2-methylpropane sulfonic acid in a molar ratio of about 1:1 or a copolymer of styrene sulfonic acid and maleic acid in a molar ratio of about 3:1, said copolymer having a molecular weight of from about 4,000 to 6,000 and said 2-phosphonobutane-1,2,4-tricarboxylic acid and copolymer being added in a respective weight ratio of about 4:1 to 1:4 and in a total dosage of about 0.1 to 50 ppm.
- 2. Method according to claim 1 in which the copolymer is said copolymer of methacrylic acid/2 acrylamido 2 methyl propane sulfonic acid.
- 3. Method according to claim 2 in which the copolymer has a molecular weight of about 5,000.
- 4. Method according to claim 1 in which the copolymer is said copolymer of styrene sulfonic acid and maleic acid.
- 5. Method according to claim 4 in which the copolymer has a molecular weight of about 4,500.
- 6. Method according to claim 1 in which the 2-phosphonobutane-1,2,4-tricarboxylic acid and the copolymer are added in a respective weight ratio of about 1:1.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7936773 |
Oct 1979 |
GBX |
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Parent Case Info
This is a continuation of application Ser. No. 194,033, filed Oct. 6, 1980, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (4)
Number |
Date |
Country |
1234320 |
Jun 1971 |
GBX |
1463173 |
Feb 1977 |
GBX |
1534596 |
Dec 1978 |
GBX |
2023121 |
Dec 1979 |
GBX |
Continuations (1)
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Number |
Date |
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Parent |
194033 |
Oct 1980 |
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