Hydrazides of amino-polyacetic acids as chelants

Details Hydrazides of amino-polyacetic acids as chelants Hydrazides of amino-polyacetic acids as chelants

1987-08-05

1988-10-04

Wax, Robert

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

252 82, 564151, C02F 510

Patent

active

047754915

ABSTRACT:
Amino-polyacetic acids such as ethylenediaminetetraacetic acid, diethylene triaminepentaacetic acid and nitrilotriacetic acid are reacted with alkanols and then with hydrazine to form the hydrazides which may be converted to carboxyhydrazides, i.e. carbazic acids. The products perform well as chelants and sequestering agents.

REFERENCES:
patent: 3296027 (1967-01-01), Jacklin
patent: 3297580 (1967-01-01), Pitzer
patent: 3308065 (1967-03-01), Lesinski
patent: 3565813 (1971-02-01), Bersworth
patent: 3686123 (1972-08-01), Hiroshi
patent: 3859337 (1975-01-01), Herz et al.
McCutcheon's Functional Materials, 1983, p. 37.

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