Compositions – Water-softening or purifying or scale-inhibiting agents – Plant or organic material containing
Patent
1983-12-08
1986-07-15
Lieberman, Paul
Compositions
Water-softening or purifying or scale-inhibiting agents
Plant or organic material containing
252 80, 252 86, 25217424, 252180, 252DIG2, C02F 514
Patent
active
046005242
ABSTRACT:
The accumulation of scale in an aqueous system is inhibited by the addition of a copolymer of maleic acid or anhydride or fumaric acid and allyl sulfonic acid and a water soluble organic phosphonic acid such as aminotri(methylene phosphonic acid), ethylenediaminetetra(methylene phosphonic acid), hydroxyethylidene diphosphonic acid and 2-phosphonobutane tricarboxylic acid-1,2,4 or water soluble salts thereof. Scale can actually be removed by the addition of these materials to pressurized boiler water systems. Allyl or vinyl copolymers, a phosphonate, and optionally a water soluble, hardness precipitating agent such as a carbonate or a phosphate may be used when treating pressurized boilers to provide an in-service cleaning effect.
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Cuisia Dionisio G.
Hwa Chih M.
Heiser David E.
Lieberman Paul
McDowell, Jr. W. W.
W. R. Grace & Co.
Wax Robert A.
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