Process for separating off calcium nitrate tetrahydrate by...

Details Process for separating off calcium nitrate tetrahydrate by... Process for separating off calcium nitrate tetrahydrate by...

C - Chemistry, Metallurgy

01

F

23/203

C01F 11/44 (2006.01) C01B 25/22 (2006.01) C05C 5/04 (2006.01)

Patent

CA 1244627

ABSTRACT Separating Ca(NO3)2.4H2O from a nitrophosphate digestion liquor by crystallization, wherein Ca(NO3)2.4H2O seeding material with a particle size smaller than 100 µm is added to this liquor at a temperature of 0.1-2 °C lower than the saturation temperature, the resulting liquor is batchwise cooled, and the Ca(NO3)2.4H2O crystallized out is separated from the cooled liquor. The Ca(NO3)2.4H2O is substantially crystallized out without excessive cooling as very coarse and uniform particles which can be easily separated out.

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