Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkaline earth metal
Patent
1976-07-07
1979-02-20
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkaline earth metal
423266, 423320, C01B 2516, C01F 100, C01F 500, C22B 2620
Patent
active
041407482
ABSTRACT:
Phosphate rock and sulfuric acid are reacted to produce phosphoric acid and calcium sulfate by means of the hemihydrate wet process. In this improved process, the calcium sulfate hemihydrate is crystallized from solution in the presence of an organic sulfonic acid or a derivative thereof. The organic sulfonic acid or its derivative improves the growth of the calcium sulfate hemihydrate crystals and thus improves the filtration rate of the slurry produced in this improved process.
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Bisson Barry A.
Grannen, Jr. Edward A.
Lane W. G.
Occidental Petroleum Corporation
Vertiz O. R.
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