Title: Method for prodn. of high efficiency composite fertilizer contg. nitrogen, phosphorous and potassium
Application Number: 98110929 Application Date: 1998.07.02
Publication Number: 1242352 Publication Date: 2000.01.26
Approval Pub. Date: Granted Pub. Date: 2002.11.27
International Classifi-cation: C05D9/00
Applicant(s) Name: Shanghai Chemical Engineering Research Inst., Mini Address: 200062
Inventor(s) Name:
Attorney & Agent: gao shiqun
Abstract:
     The high-efficiency production method of azophoska composite fertilizer is characterized by that utilizing existent general calcium production equipment, using ground phosphorite, chloride and sulfuric acid as raw material, stirring and mixing them to produce reaction, keeping reaction temp. below 80 deg.C, and making the material obtained after the above-mentioned reaction undergo the processes of chemosynthesis and curing so as to directly obtain the invented composite fertilizer containing nitrogen, phosphorus and potassium. Said invented fertilizer is good in properties of matter, short in curing period, and can need no curing period, its total nutrient content can be up to 20-30%, and the escaping rate of fluorine and chlorine in the course of production is low, so that it is favourable for protecting environment, and its operation is simple and easy.
Time: 8
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