Method of treating aqueous systems with phosphonoadipic acids

Details Method of treating aqueous systems with phosphonoadipic acids Method of treating aqueous systems with phosphonoadipic acids

1979-10-22

1981-05-05

Weinblatt, Mayer

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

252175, 252180, 252389A, 2605074R, 422 15, 560190, B01D 2101

Patent

active

042657695

ABSTRACT:
A compound or mixture of compounds of the general formula: ##STR1## in which m and n may be 0 or 1 but both cannot be 1, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are independently H or CH.sub.3, X.sup.1, X.sup.2, Z.sup.1 and Z.sup.2 are independently hydrogen or straight or branched chain C.sub.1 -C.sub.4 alkyl; and the water-soluble inorganic or organic salts thereof, with the proviso that at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 must be CH.sub.3, and when m and n are both 0, R.sup.2 and R.sup.3 are each methyl and R.sup.4 and R.sup.5 have their previous significance, when added to an aqueous system imparts one or more of the following beneficial effects to be treated system:

REFERENCES:
patent: 2616918 (1952-11-01), Johnston
patent: 3714066 (1973-01-01), King
patent: 4052160 (1977-10-01), Cook et al.
Opitz et al. Ann 640, 36 (1961).
Kabachnik et al. CA 47, 4848e (1953).

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