Method of ammonium sulfate purification

Details Method of ammonium sulfate purification Method of ammonium sulfate purification

C - Chemistry, Metallurgy

01

C

C01C 1/24 (2006.01) C01B 17/02 (2006.01) C01D 7/02 (2006.01) C01D 7/18 (2006.01)

Patent

CA 2284969

A process for synthesizing ammonium sulfate and United States Pharmacopoeia grade sodium bicarbonate. The process allows an energy efficient conversion of precursor sodium sulfate and bicarbonate to ammonium sulfate high grade fertilizer and the pharmaceutical grade sodium bicarbonate by saturation of process brine with sodium sulfate. This step was previously unrecognized in the art, which resulted in prior art methods being ineffectual from engineering, energy and product quality points of view. The present process reintroduces sodium sulfate into the process brine or solution to perpetuate the conversion process in the absence of separation problems and energy expenditures inherent in the prior art techniques.

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