Aqueous aminomethylenephosphonic acid solutions containing organ

Details Aqueous aminomethylenephosphonic acid solutions containing organ Aqueous aminomethylenephosphonic acid solutions containing organ

1985-02-26

1985-10-22

Evans, J. E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252142, C07F 938

Patent

active

045487570

ABSTRACT:
Aqueous solutions of aminomethylenephosphonic acid, chiefly diethylenetriaminepenta(methylenephosphonic acid), are disclosed containing a crystallization inhibitor which is an alkali-metal salt of an organic carboxylic acid and residual hydrochloric acid originating from the manufacturing process. The equivalent molar concentration ratio of carboxylic acid salt to hydrochloric acid is greater than 1, preferably from 1.5 to 3.

REFERENCES:
patent: 3288846 (1966-11-01), Irani et al.
patent: 3298956 (1967-01-01), Irani et al.
patent: 3816333 (1974-06-01), King et al.
patent: 3832393 (1974-08-01), Krueger et al.

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