反应结晶制备工业级磷酸二氢钾过程的粒度控制

doi:10.16085/j.issn.1000-6613.2017-0260

化工进展 ›› 2017, Vol. 36 ›› Issue (10): 3590-3595.DOI: 10.16085/j.issn.1000-6613.2017-0260

反应结晶制备工业级磷酸二氢钾过程的粒度控制

丁一刚¹, 韩永红¹, 骆万智¹, 龙秉文¹, 余莹², 居丽²

1. 武汉工程大学化工与制药学院, 绿色化工过程省部共建教育部重点实验室, 湖北省新型反应器与绿色化学工艺重点实验室, 湖北武汉 430205;
2. 湖北祥云(集团)化工股份有限公司, 湖北武汉 435405

收稿日期:2017-02-22 修回日期:2017-05-07 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 龙秉文,教授.
作者简介:丁一刚(1963-),男,教授,博士生导师.E-mail:dygzhangli@163.com.
基金资助:
湖北省科技支撑计划（2015BCB248）及湖北省重大科技创新计划（2016ACA179）项目。

Size control for the reactive crystallization of potassium dihydrogen

DING Yigang¹, HAN Yonghong¹, LUO Wanzhi¹, LONG Bingwen¹, YU Ying², JU Li²

1. The Hubei Key Laboratory of New-Type Reactors and Green Chemical Technology, Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, Hubei, China;
2. Hubei Xiangyun(Group)Chemical Co., Ltd., Wuhan 435405, Hubei, China

Received:2017-02-22 Revised:2017-05-07 Online:2017-10-05 Published:2017-10-05

摘要/Abstract

摘要： 以工业级磷酸一铵为原料与氢氧化钾复分解反应结晶制备磷酸二氢钾是一种成本低廉、极具发展前景的方法，实验确定了采用该法制备的磷酸二氢钾产品粒度主要受反应阶段控制，继而研究分析了反应时间、搅拌速度、原料浓度和加入速率对磷酸二氢钾产品粒度分布的影响，探讨了磷酸二氢钾反应结晶机理，筛选出较优的反应结晶工艺。在控制磷酸一铵和氢氧化钾质量分数为50%，氢氧化钾溶液在30min内加入完毕，反应结晶时间为3h，搅拌速率为300r/min的条件下，获得的磷酸二氢钾产品中位粒径为1070μm，分布均匀，晶体形貌为规则的四方晶。

关键词: 磷酸二氢钾, 反应结晶, 粒度分布, 过程

Abstract: Potassium dihydrogen phosphate(KH₂PO₄)was prepared by reactive crystallization of ammonium phosphate(MAP)and potassium hydroxide(KOH),which was promising for industrialization due to low cost. It was experimentally proved that the crystal size of final KH₂PO₄ product was mainly determined in the reaction stage. Therefore,the effect of reaction time,stirring speed,feed concentration,and feeding time on the crystal size distribution of KH₂PO₄,was studied and the reaction crystallization mechanism was discussed. Proper reaction crystallization conditions were proposed as:MAP and KOH solution mass percentage of 50%,KOH feeding time of 30min,reaction time of 3h,and stirring speed of 300r/min. Under those conditions,the median size of KH₂PO₄ product was 1070μm with fairly uniform distribution and regular tetragonal crystal morphology.

Key words: potassium dihydrogen phosphate, reaction crystallization, crystal size distribution, process

中图分类号:

TQ134.1

丁一刚, 韩永红, 骆万智, 龙秉文, 余莹, 居丽. 反应结晶制备工业级磷酸二氢钾过程的粒度控制[J]. 化工进展, 2017, 36(10): 3590-3595.

DING Yigang, HAN Yonghong, LUO Wanzhi, LONG Bingwen, YU Ying, JU Li. Size control for the reactive crystallization of potassium dihydrogen[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3590-3595.

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反应结晶制备工业级磷酸二氢钾过程的粒度控制

Size control for the reactive crystallization of potassium dihydrogen

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