Title: High-effective phosphorus-ammonium compound fertilizer
Application Number: 88108343 Application Date: 1988.12.09
Publication Number: 1043306 Publication Date: 1990.06.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C05B21/00,C05D9/00
Applicant(s) Name: Feng Haiyang Address:
Inventor(s) Name: Feng Haiyang
Attorney & Agent:
Abstract:
     This invention relates to a process for preparing a highly effective compound fertilizer containing ammonium phosphate, trace elements and rare-earth elements. The P-ore powder is decomposed by sulfur trioxide or sulfuric acid or nitric acid under normal temp. and pressure. The resultant then reacts with ammonia or its compounds. Finally, such ore powders as Cu, Co, Mo, Mn, B and rare-earth are added to form the compound furtilizer with a P2O5 content of 46-52%. Its use has been proved that it can obviously increase the yields of wheat, rice, corn, vegetables and fruits. The invention has the advantages of easily available raw materials, simple technological flow and low cost for apparatus.
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