Title: Process for production of granulated di-ammonium phosphate containing fertilizer
Application Number: 90102317 Application Date: 1990.04.19
Publication Number: 1055912 Publication Date: 1991.11.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C05C3/00,C05C9/00
Applicant(s) Name: Norsk Hydro A. S. Address:
Inventor(s) Name:
Attorney & Agent: RONG PEIZHUANG YANG LIQIN
Abstract:
     The present invention relates to a process for the production of granulated di-ammonium phosphate containing fertilizers and comprising ammoniation of phosphoric acid in a tubular reactor situated in a drier. All the phosphoric acid and substantially all the ammonia is fed via a tubular reactor feeding the drier. The recycle ratio is less than 3:1. The phosphoric acid concentration is preferably between 36 and 50% P2O5. The ratio applied between ammonia and phostubular reactor having an N:P mole ratio of 1.6-2.0:1. Urea and.or a potassium source may be supplied to the granulator for making NP- or NPK-fertilizer.
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