湿法磷酸净化的萃余酸联产磷酸二氢铵和磷酸氢二钠？ 湿法磷酸净化的萃余酸联产 磷酸二氢铵 和 磷酸氢二钠 王邵东 。张红映 ，李军 (1．贵州宏福实业开发有限总公司，贵州福泉550501；2．四川大学化工系) 摘要：湿法磷酸净化及滴灌施肥技术是近年来推广应用的先进技术。湿法磷酸净化技术可大幅度节能，而 滴灌施肥可达到节水及高效吸收肥效的目的。提出了用湿法磷酸净化装置副产的萃余酸制滴灌磷酸二氢铵 (MAP)和 工业级磷酸氢二钠 (DSHP)的工艺方案。将滴灌MAP和DSHP的生产结合起来，既充分利用了萃余酸中 的钠离子，又克服了萃余酸不能单独生产滴灌MAP的不足，同时生产两种产品可降低成本。该联产工艺的特点在 于用生产滴灌MAP后的母液来生产DSHP。实验证明该工艺合理可行，可生产出高品质的滴灌MAP和DSHP，而 且生产成本低。有较大的市场竞争力。 关键词：滴灌MAP；DSHP；萃余酸；结晶 中图分类号：TQ126．35 文献标识码：A 文章编号：1006—4990(2008)o4—0039—02 Study on the joint production of ammonium dihydrogen phosphate and disodium hydrogen phosphate with the raffinate from phosphoric acid purification apparatus Wang Shaodong 。Zhang Hongying ，Li Jun (1．Gu&hou Honffiz Co．Lid．。Fuquan 550501，China；2．Depaamem ofChemical Engineering，Sichuan Unwemity) Abstract：The puri~ing technique of wet——process phosphoric acid and drip——irrigation fertilization technique were advanced techniques being spread in recent years．The former can greatly save energy consumption and the latter can a— chieve the aim of saving water and improving manurial effect．In this paper，a process plan has been proposed for the joint production of drip—irrigation monoammonium phosphate(MAP)and industrial grade disodium hydrogen phosphme (DSHP)with the rafinate from phosphoric acid purification apparatus．The joint production of drip—irrigation MAP and DSHP-not only took full advantage of sodium ions in raffinate，but also overcame the deficiency of raffinate，which can not be used alone to produce drip—irrigation MAP．Meanwhile-the production cost can be reduced when producing the two products at the same time．The advantage of joint production consists in its using the mother solution of drip—irrigation MAP to produce DSHP．Experiments proved that this technology is feasible-for it can produce high quality-drip—irrigation MAP and DSHP with low cost and large market competitive capability． Key words：drip—irrigation MAP；disodium hydrogen phosphate；rafinate；crysta查看更多1个回答 . 1人已关注
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