Production of stabilized wet process phosphoric acid

Details Production of stabilized wet process phosphoric acid Production of stabilized wet process phosphoric acid

1979-07-03

1981-02-03

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321R, C01B 2516

Patent

active

042488460

ABSTRACT:
This invention is directed to improvements in making wet process phosphoric acid substantially free from post-precipitation. The improvements include recycling to the reaction train a side stream produced by the process; cooling one or more of the streams of the process; and/or addition of sulfuric acid to an evaporator.

REFERENCES:
patent: 2936888 (1960-05-01), Williams
patent: 3528771 (1970-09-01), Shearon et al.
patent: 4048289 (1977-09-01), Pierres
patent: 4110422 (1978-08-01), Hill
patent: 4164550 (1979-08-01), Hill

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