Title: Method for whitening agricultural ammonium carbonate using chemcial additive
Application Number: 97108614 Application Date: 1997.06.30
Publication Number: 1175551 Publication Date: 1998.03.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C01C1/26
Applicant(s) Name: Hanzhong Nitrogen Fertilizer Plant Address: 723000
Inventor(s) Name: Song zhichao, Li Xiangming
Attorney & Agent: FENG TAO
Abstract:
     A process for whitening agricultural ammonium bicarbonate with chemical additive features that feedstock gas containing CO2 is introduced into carbonifying tower with ammonia water therein to generate crystal of ammonium bicarbonate ,and additive HD is then added to it to precipitate harmful elements from mother liquid. The mother liquid containing said crystal is separated out to produce white ammonium bicarbonate with big granularity. Its advantages are high speed, no harmful reaction and low cost.
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