Process for producing and decomposing syngenite for...

Details Process for producing and decomposing syngenite for... Process for producing and decomposing syngenite for...

C - Chemistry, Metallurgy

01

D

23/104, 23/202,

C01D 5/10 (2006.01) C01D 5/00 (2006.01) C01D 9/00 (2006.01) C05D 1/02 (2006.01)

Patent

CA 1217027

ABSTRACT A process for producing K2SO4 from potassium chloride salts, calcium sulphate salts and another sulphate source wherein syngenite is formed and then decomposed. In one embodiment, syngenite is decomposed to produce crystalline K3H(SO4)2. The K3H(SO4)2 crystals are recrystallized to produce K2SO4 crystals. In another embodiment, syngenite is decomposed to produce KNO3 in solution and solid CaSO4. The solution containing the KNO3 is separated from the CaSO4 precipitate and subjected to a crystallization step, followed by recovery of the solid crystalline KNO3.

463023

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