【摘要】 目的——研究湿法磷酸合成磷酸脲的工艺.方法——通过正交实验,对反应温度、反应时间、物料比以及母液的循环利用等各影响因素加以分析.结果——确定了湿法磷酸合成磷酸脲的最佳工艺条件为反应温度T=70℃;反应时间t=35min;摩尔比(n(CO(NH2)2)∶n(H3PO4))=1.05∶1.结论——湿法磷酸合成磷酸脲要求磷酸浓度低,生产成本较低,且生产中母液可循环使用,使废料排放降至最低.更多还原

【Abstract】 Purpose: the synthesis and technology of urea phosphate from urea and wet process phosphoric acid had been studied in the paper.Method: the optimal operation conditions were determined through orthogonal experiment and analysis of reaction temperature,reaction time,the mol ratio of urea to wet process phosphoric acid and the reusing of mother liquor.Result: the optimal operation conditions were: reaction temperature was 70 ℃,reaction time was 35 min,the mol ratio of urea to wet process phosphoric acid was 1.05∶ 1.Conclusion: requiring chroma of phosphoric acid and its cost of production on the technology of urea phosphate with wet process phosphoric acid were low.In the production,mother liquor was reused and letting of flotsam was to the dropped lowest.更多还原