Copolymers for the control of the formation and deposition of ma

Details Copolymers for the control of the formation and deposition of ma Copolymers for the control of the formation and deposition of ma

1979-01-19

1981-09-08

Therkorn, Ernest G.

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

C02F 510

Patent

active

042883270

ABSTRACT:
The present invention relates to processes for controlling the formation and deposition of scale and sludge and in particular calcium phosphate which would otherwise occur in aqueous mediums containing sludge and the ions capable of forming scale. The invention, more particularly, relates to the control, reduction and/or prevention of scale and sludge deposits in cooling water, scrubber and steam generating systems, evaporators, economizers, and the like by the introduction of a copolymer comprising sulfonated styrene and maleic anhydride moieties to the water used therein. The copolymers discovered to be particularly effective for the purpose are those having a mole ratio of sulfonated styrene moieties to moieties derived from maleic anhydride of from about 2:1 to about 4:1 and preferably 2:1 to 3:1 with certain type deposits.

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