湿法磷酸净化生产工业磷酸一铵研究? 无机盐工业第41卷第10期2009年10月 P45~46,有兴趣者可查询原文 湿法磷酸净化生产 工业磷酸一铵 研究 [作者] 马凯,马培华,贲艳英 [摘要] 磷酸一铵 用作灭火剂、阻燃剂等工业领域需要有较高的纯度。传统的湿法磷酸氨化法生产的磷酸一铵杂质含量高,主要用作农业肥料,无法作为工业品使用。工业用磷酸一铵一般采用热法磷酸来生产,成本高,污染重。研究了将湿法磷酸净化来生产工业用磷酸一铵的方法,同时副产肥料级磷酸一铵。研究结果表明,该方法可以生产磷(以五氧化二磷计)质量分数在59%以上的工业用磷酸一铵,磷(以五氧化二磷计)收率在70%以上,副产的肥料级磷酸一铵有效磷(以五氧化二磷计)质量分数在30%~40%,有效磷收率为15%~20%。 中图分类号:TQ126.3 文献标识码:A 文章编号:1006-4990(2009)10-0045-02 [关键词]湿法磷酸净化;工业磷酸一铵;肥料磷酸一铵 Study on production of industrial monoammonium phosphate by purification of wet-process phosphoric acid [author(s)] Ma Kai,Ma Peihua,Ben Yanying [abstract] Monoammonium phosphate (MAP) used as fire extinguishing agent and anti-combustion additive etc.requires a higher purity.MAP produced by traditional wet-process phosphoric acid (WPA) amination method is mainly applied in agriculture fertilizers and can not be used as industrial product because of high content of impurities.Industrial MAP is usually produced from thermal phosphoric acid,however,the cost is high and the pollution is severe.The method that through purification of WPA to produce MAP and by-producing fertilizer-grade MAP at the same time was studied.Results showed that the industrial MAP prepared by this method with mass fraction of phosphorus (as P2O5) was more than 59% and absorption ratio of phosphorus (as P2O5) was above 70%;mass fraction of available phosphorus (as P2O5) of by-produced fertilizer-grade MAP was 30%~ 40% and absorption ratio of available phosphorus was 15%~20%. [key words]wet-process phosphoric acid purification;industrial monoammonium phosphate;fertilizer-grade monoammonium phosphate 我在这里只叙述研究结果: 1. 氢氧化钙 和磷矿粉加入对除去SO4均有良好效果,当磷矿粉加入量为理论量的150%时可除去60%的SO4,当氢氧化钙加入量为理论量的150%时可除去70%的SO4 2.改方法在N/P摩尔比为0.2~0.6时可生产含P2O5 59%以上的工业级MAP,P2O5收率在70%以上,副产物肥料级MAP有效磷(P2O5)质量分数为30~40%,有效磷收率为15~20% 基本方法: 取湿法磷酸,加入氢氧化钙,加入磷矿粉,过滤 滤液再加磷矿粉,煮沸后,冷却,过夜,再过滤,滤液再加氢氧化钡,进一步除去SO4,煮沸后自然冷却,不过滤。 经过除SO4的磷酸加入氨水,陈化后过滤除杂。 查看更多3个回答 . 2人已关注