Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Alkali metal
Patent
1977-07-19
1978-12-12
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Alkali metal
423166, 423197, C01D 500, C01D 512
Patent
active
041296427
ABSTRACT:
Potassium sulfate is produced from a mixture of carnallite, potassium chloride, kieserite and residual quantities of less than 15% by weight of rock salt by treating the mixture at a temperature of 20.degree.-40.degree. C with potash magnesia liquor to form a slurry with at most 70 mole MgCl.sub.2 /1000 mole H.sub.2 O, whereafter the liquor portion of the slurry comprising a solution saturated with carnallite and rock salt is separated from the solid substance, which solid substance is then converted at temperatures of 75.degree.-110.degree. with a sulfate liquor, which contains 18-45 mole MgCl.sub.2 /1000 mole H.sub.2 O, into a mixture of langbeinite and potassium chloride, which mixture after separation from the liquor is treated at temperatures of 15.degree.-110.degree. C with a sulfate liquor containing 18-50 mole MgCl.sub.2 /1000 mole H.sub.2 O, whereupon the crystallizate is separated from the mother liquor and is converted with water to potassium sulfate.
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DeLaurentis Anthony
Kali & Salz AG
Langel Wayne A.
Vertiz O. R.
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