Manufacture of phosphoric acid

Details Manufacture of phosphoric acid Manufacture of phosphoric acid

1974-03-25

1976-10-05

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423167, C01B 2516

Patent

active

039845257

ABSTRACT:
Production of phosphoric acid by the wet process and by-product calcium sulphate hemihydrate. Sulphuric acid reacts with phosphate rock in such conditions that gypsum is precipitated, the resulting slurry is transferred to a second vessel in which the conditions are such that the gypsum recrystallises to calcium sulphate hemihydrate. Calcium sulphate hemihydrate so produced may be converted to cement and sulphuric acid by a process analogous to the anhydrite process for production of sulphuric acid. The phosphoric acid produced may be desulphated in a process integrated with the phosphoric production.

REFERENCES:
patent: 3124419 (1964-03-01), Germaine et al.

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