Synergistic sequestering agent compositions

Details Synergistic sequestering agent compositions Synergistic sequestering agent compositions

1974-05-08

1976-05-25

Weinblatt, Mayer

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

210 58, 252DIG11, 252DIG17, 252181, 252389A, C02B 500

Patent

active

039591689

ABSTRACT:
A synergistic sequestering agent composition comprising (a) 1-hydroxyethane-1,1-diphosphonic acid and its alkali metal and ammonium salts, or, preferably and (b) aminotrimethylenephosphonic acid and its alkali metal and ammonium salts, as well as (c) a phosphonopolycarboxylic acid selected from the group consisting of phosphonosuccinic acid, methylphosphonosuccinic acid and 2-phosphonobutane-1,2,4-tricarboxylic acid and their alkali metal and ammonium salts. The said mixture of sequestering agents is useful as a sequestering agent for aqueous solutions containing bivalent and trivalent cations especially in sub-stoichiometric amounts.

REFERENCES:
patent: 3586633 (1971-06-01), Schlussler
patent: 3723333 (1973-03-01), Freyhold

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