Hydrazides of amino-polyacetic acids as chelants

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

1985-12-17

1988-02-23

Wax, Robert

Compositions

Dust suppressants for bulk materials, or processes of...

134 2, 134 2214, 134 2219, 134 42, 252 80, 252148, C23G 114

Patent

active

047269073

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: 3686123 (1972-08-01), Hiroshi
patent: 3859337 (1975-01-01), Herz et al.

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