Process for preparing alkali metal orthophosphates and ammonia

Details Process for preparing alkali metal orthophosphates and ammonia Process for preparing alkali metal orthophosphates and ammonia

1974-12-30

1976-02-17

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423356, 423305, 423437, C01B 1516, C01B 2526, C01C 102, C01B 3120

Patent

active

039392546

ABSTRACT:
Aqueous monoammonium phosphate is reacted at elevated temperature with sodium carbonate in a vertical column having vapor-liquid contact means to produce an aqueous solution of sodium ammonium phosphate having a reduced carbon dioxide content. The sodium ammonium phosphate solution is treated in a second such column at elevated temperature and pressure to produce ammonia and an ammonia-free solution of alkali metal orthophosphate having a desired alkali metal to phosphorus molar ratio.

REFERENCES:
patent: 1916980 (1933-07-01), Horvitz
patent: 3337297 (1967-08-01), Cook et al.
patent: 3531242 (1970-09-01), Hayakawa et al.
patent: 3619133 (1971-11-01), Fukuba et al.
patent: 3826815 (1974-07-01), Marcovic

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