Nitrogen fertilizer composition and its preparation method

Application Number: 00110381
Application Date: 2000.04.30
Publication Number: 1321622
Publication Date: 2001.11.14
Priority Information:
International: B01F17/00;B01J2/00;C05G3/00
Applicant(s) Name: China Petro-chemical Corp.
Inventor(s) Name: Wang Dingcong;Li Yanbin
Patent Agency Code: 21102
Patent Agent: li wei
Abstract The present invention relates to a slow-release nitrogen fertilizer, it is a micrometer-size nitrogen-in-oil fertilizer which is made up by wrapping water-soluble nitrogen fertilizer with oil phase, emulsifier and emulsification aid. The water-soluble nitrogen fertilizer is formed from one or several kinds of urea, ammonium nitrate, sodium nitrate, caclium nitrate, ammonium hydrogen carbonate, ammonium chloride and ammonium sulfate, and its oil phase is one or several kinds of reduced distillate oil, reduced-pressure paraffin jelly, residual paraffin jelly and deasphalted oil, and the emulsifier is one kind of water-in-oil (W/O) emulsifier whose HLB value is 3-6 or mixture of several kinds of emulsifiers, and one or several kinds of emulsification aids. Said invented slow-releasing nitrogen fertilizer can be slowly dissolved in water, and possesses strong water-resistance and long slow-release period.