Method for scale control

Details Method for scale control Method for scale control

1980-12-04

1982-09-28

Hayes, Lorenzo B.

Chemical apparatus and process disinfecting, deodorizing, preser

Process disinfecting, preserving, deodorizing, or sterilizing

Maintaining environment nondestructive to metal

106 1412, 106 1413, 252181, 252389A, 422 17, 422 18, C23F 1116, C23F 1118

Patent

active

043517960

ABSTRACT:
A method of inhibiting the deposition of calcium phosphate scale from an aqueous system treated with a corrosion inhibitor formulation containing a phosphono-carboxylic acid and a polyphosphate comprises adding to the aqueous system a minor amount of hydrolyzed polymaleic anhydride having a molecular weight in the range of from 300 to 5000 as determined by calculation following osmometric measurement on the polymaleic anhydride before hydrolysis, or a water-soluble salt or a hydrolyzed copolymer of polymaleic anhydride.

REFERENCES:
patent: 3810834 (1974-05-01), Jones et al.
patent: 3837803 (1974-09-01), Carter et al.
patent: 3923876 (1975-12-01), Heins et al.
patent: 3935125 (1976-01-01), Jacob
patent: 3959168 (1976-05-01), Germscheid et al.
patent: 3963636 (1976-06-01), Harris et al.
patent: 3992318 (1976-11-01), Gaupp et al.
patent: 4042324 (1977-08-01), Auel et al.
patent: 4052160 (1977-10-01), Cook et al.
patent: 4057511 (1977-11-01), Bohnsack et al.
patent: 4105581 (1978-08-01), Sexsmith
Chem. Abstract vol. 80 (1974) 123690j.
Chem. Abstract vol. 81 (1974) 54260a.

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