Title: Urea fertilizer with compositely long effect containing trace elements and process for manufacturing same
Application Number: 90105116 Application Date: 1990.05.19
Publication Number: 1056860 Publication Date: 1991.12.11
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C05C9/00
Applicant(s) Name: Shenyang Inst. of Applied Ecology, Chinese Academy Address:
Inventor(s) Name: Gong Tiling, Zhou Likai
Attorney & Agent: WANG HUIMIN
Abstract:
     This trace-element long-active composite urea fertilizer contains one or more of such trace elements as Zn, Mn, Mo, Cu, B, or Fe. After addition of trace elements, the content of long-active urea or urea is not less than 20%. Besides using present technology, apparatus and condition to industrially produce long-active urea or urea, a trace element solution tank and a metering pump is used. The trace element containing solution is added before the granulation of the fertilizer to obtain such trace-element long-active composite urea fertilizer.
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