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Calcium sulphate CaSO

Fluoride production consists on reacting fluorspar mineral (CaF ) with H SO (cc) to form HF and calcium sulphate. However, reactions do not achieve 100 % yield, so fluorogypsum or anhydrite (CaSO ) obtained contains small amounts of fluoride as CaF in its stmcture. The application of this kind of subproduct is well-known as constmction material, so that the flouride content has to be controlled. [Pg.271]

The acid treatment converts the bicarbonate to the more stable and more soluble CaSO. If there is already a substantial sulphate concentration in the water to be treated, then an alternative mineral acid (e.g. HCI) may be used to reduce alkalinity without increasing the risk of calcium sulphate deposition. One of the major... [Pg.298]

See other pages where Calcium sulphate CaSO is mentioned: [Pg.289]    [Pg.289]    [Pg.104]    [Pg.166]    [Pg.453]    [Pg.289]    [Pg.289]    [Pg.104]    [Pg.166]    [Pg.453]    [Pg.290]    [Pg.694]    [Pg.185]    [Pg.456]    [Pg.169]    [Pg.99]    [Pg.344]    [Pg.301]    [Pg.66]    [Pg.171]    [Pg.451]   
See also in sourсe #XX -- [ Pg.4 , Pg.214 ]



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Calcium sulphate

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