Production of synthetic anhydrite

Details Production of synthetic anhydrite Production of synthetic anhydrite

1974-05-22

1977-04-05

Vertiz, Oscar R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

106109, 423555, C04B 1106

Patent

active

040162400

ABSTRACT:
The process for the production of synthetic anhydrite of uniform quality from the residue resulting from the production of hydrofluoric acid and containing calcium sulfate and acid, comprising suspending said residue in water with vigorous agitation, neutralizing said residue, grinding the suspension and separating water from the suspension to leave synthetic anhydrite containing less than about 50% water by weight. The product is thereafter dried after the optional addition of fillers and/or additives which accelerate subsequent hydration.

REFERENCES:
patent: 1713868 (1929-05-01), Edwards
patent: 1756637 (1930-04-01), Edwards
patent: 2959466 (1960-11-01), Reimers
patent: 3024123 (1962-03-01), Theilacker
patent: 3822340 (1974-07-01), Eberl et al.
patent: 3825655 (1974-07-01), Eipeltauer
patent: 3834917 (1974-09-01), Speckelmeyer et al.
patent: 3847634 (1974-11-01), Vickery

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