Process for making alkali metal phosphate solutions containing l

Details Process for making alkali metal phosphate solutions containing l Process for making alkali metal phosphate solutions containing l

1984-12-14

1987-02-03

Doll, John

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkali metal

423313, 423321S, C01B 2516

Patent

active

046408240

ABSTRACT:
The disclosure relates to a process for making alkali metal phosphate solutions containing little fluorine from pre-purified alkali metal phosphate solutions obtained from crude phosphoric acid by extracting the acid with an organic solvent being immiscible or only partially miscible with water, scrubbing the crude extract with water or an alkali metal solution, re-extracting the phosphoric acid from the scrubbed extract with the use of an aqueous alkali metal solution while establishing an alkali metal/P-molar ratio equal to or larger than 1:1, and separating the resulting organic phase from the pre-purified alkali metal phosphate solution obtained.
To this end, the disclosure provides:

REFERENCES:
patent: 2053319 (1936-09-01), Block et al.

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