| 脲甲醛缓释肥料的制备 |
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| 引用本文： | 张文辉,魏婵,谷守玉.脲甲醛缓释肥料的制备[J].磷肥与复肥,2011,26(2):12-13,44. |
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| 作者姓名： | 张文辉 魏婵 谷守玉 |
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| 作者单位： | 郑州大学,化工与能源学院,河南,郑州,450001 |
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| 摘 要： | 对合成脲甲醛肥料的工艺条件进行了优化实验,得到适宜的制备脲甲醛肥料的工艺条件为:n(U)/n(F)=1.3,羟甲基化反应阶段加碱控制pH=7.0～7.5,亚甲基化反应阶段加酸控制pH=3.0～3.5,反应温度均为40℃,反应时间为1.5 h;产品烘干温度为90℃.在此条件下得到产品活性指数AI=55.26%,氮的转化率...
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| 关 键 词： | 脲甲醛缓释肥 制备 工艺条件 |
Preparation of urea-formaldehyde slow release fertilizer |
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| ZHANG Wen-hui,WEI Chan,GU Shou-yu.Preparation of urea-formaldehyde slow release fertilizer[J].Phosphate & Compound Fertilizer,2011,26(2):12-13,44. |
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| Authors: | ZHANG Wen-hui WEI Chan GU Shou-yu |
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| Affiliation: | ZHANG Wen-hui,WEI Chan,GU Shou-yu(School of Chemical Engineering and Energy,Zhengzhou University,Zhengzhou,Henan 450001,China) |
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| Abstract: | The optimum process conditions for preparation of urea-formaldehyde slow release fertilizer are determined by experiment： n （U）/ n （F） of 1.3, controlling the pH of 7.0-7.5 with alkaline in hydroxymethylation and the pH of 3.0 - 3.5 with acid in methylenation, reaction temperature of 40 ℃, reaction time of 1.5 h, drying product temperature of 90 ℃, with the activity index of product Al of 55.26%, the nitrogen conversion rate of 67.67%. These are up to the standard of AOAC. |
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| Keywords: | urea-formaldehyde slow release fertilizer preparation process conditions |
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