Title: Production of lang life urea fertilizers containing para-dihydroxyl-benzene
Application Number: 85109580 Application Date: 1985.12.30
Publication Number: 1008474 Publication Date: 1987.02.11
Approval Pub. Date: Granted Pub. Date: 1989.09.27
International Classifi-cation: C05C9/00,C07C126/10
Applicant(s) Name: Forestry and Soil Research Institute Chinese Acade Address:
Inventor(s) Name: Cao Chengmian, Yan Xusheng
Attorney & Agent: MI SHUQING LI SHAOGUANG
Abstract:
     This invention is specialized by the addition of 0.05-0.30% of P-dihydroxyl-benzene to urea or urea derivatives in order to provide fertilizers with long life efficiency. This invention provides a process and specific installations for producing such fertilizers. Before granulation P-dihydroxyl-benzene is added to urea and mixed. The mixing equipments comprise of two mixers, tanks for P-dihydroxyl-benzene and two pumps. Fertilizers thus produced give 6-20% more harvest than the conventional means in the experimental farm.
Time: 8
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