Title: Method for preparation of high concentration N-P-K compound base fertilizer
Application Number: 85108924 Application Date: 1985.12.04
Publication Number: 1011475 Publication Date: 1987.06.10
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C05B11/00
Applicant(s) Name: Gejiushi Chemical Fertilizer Plant Address:
Inventor(s) Name: Yang Jiafu
Attorney & Agent: ZHANG YI
Abstract:
     The water-soluble phosphorous and part of the structure-soluble phosphorous are extracted from ordinary calcium superphosphate by aq. soln. of potassium sulphate acidified by phosphoric acid. After filtering, the extract is neutralized to PH 4-5 by adding aq. soln. of potassium hydroxide or ammonium hydroxide, then concd., and dewatered to obtain said solid compound base fertilizer. The total content of N-P2O5-K2O of the present base fertilizer exceeds 68%, so it is a high concn. fertilizer, and can be easily formulated with other industrial products to make a series of commercial multifunctional N-P2O5-K2O compound fertilizer.
Time: 4
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