Scale inhibitors

Compositions – Leather or fur treating

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Details

252180, 210699, E21B 4328, C02F 514

Patent

active

048745359

ABSTRACT:
A scale inhibiting composition comprises the combination of (a) a copolymer of an alkene, preferably a branched chain alkene, and an unsaturated dicarboxylic acid or anhydride, in acidic or neutralized form, and (b) an organic polyphosphonic acid or salt.
A preferred composition contains the sodium salt of a copolymer of isobutene and maleic anhydride and 1-hydroxyethyl-1,1-diphosphonic acid.
The compositions may be used in secondary or tertiary oil recovery, desalination of sea water and the softening of boiler feed water.

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patent: 3715307 (1973-02-01), Johnson et al.
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patent: 4008164 (1977-02-01), Watson et al.
patent: 4306991 (1981-12-01), Hwa et al.
patent: 4563284 (1986-01-01), Amjad

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