Crystal modification in wet process phosphoric acid production

Details Crystal modification in wet process phosphoric acid production Crystal modification in wet process phosphoric acid production

1990-01-29

1991-04-23

Langel, Wayne A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423166, 423167, 423266, 423555, G01B 2516, C01F 1146

Patent

active

050098730

ABSTRACT:
A wet process production of phosphoric acid in which phosphate rock is digested, whereby phosphoric acid is released and calcium sulfate crystals are formed, employs a polymeric crystal modifier in the digestion stage of the process to improve the separation of the raw phosphoric acid product from the calcium sulfate crystals and to increase the concentration of phosphoric acid in the raw phosphoric acid product.

REFERENCES:
patent: 2044942 (1936-06-01), Heckert
patent: 4140748 (1979-02-01), Ore
patent: 4291005 (1981-09-01), Poulos et al.
patent: 4314978 (1982-02-01), Franklin
patent: 4332779 (1982-06-01), Thibodeau
patent: 4581156 (1986-04-01), Chatham
patent: 4800071 (1989-01-01), Kaesler et al.

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