Title: Process for producing long effect urea containing hydrochinone
Application Number: 90105132 Application Date: 1990.05.31
Publication Number: 1056861 Publication Date: 1991.12.11
Approval Pub. Date: Granted Pub. Date: 1996.09.18
International Classifi-cation: C05C9/00
Applicant(s) Name: Shenyang Inst. of Applied Ecology, Chinese Academy Address: 110011
Inventor(s) Name: Bi Shuchun, Gong Tiling
Attorney & Agent: WANG HUIMIN
Abstract:
     This invention relates to a process for production of hydrochinone-containing long-active urea, in which two steps, solid or high-concentration aqueous solution of hydrochinone is added to molten or solid urea and sufficiently mixed, besides using existing technology of synthetic urea. Because the step of adding hydrochinone follows on the step of concentrating and separating synthetic urea, the pollution of exhaust by hydrochinone is avoided. In addition, it features simple technological route and low energy consumption.
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