无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2024, Vol. 56 ›› Issue (8): 40-46.doi: 10.19964/j.issn.1006-4990.2023-0531

• 研究与开发 • 上一篇    下一篇

一水硫酸锰在H2SO4-H2O二元体系中的结晶动力学研究

苏杭(), 宋继田(), 黄志强, 董晴, 张亚雄   

  1. 天津科技大学机械工程学院,天津市轻工与食品机械装备集成设计与在线监控重点实验室,天津 300222
  • 收稿日期:2023-11-09 出版日期:2024-08-10 发布日期:2024-09-26
  • 通讯作者: 宋继田(1967— ),男,博士,教授,研究方向为蒸发结晶技术;E-mail:songjt@tust.edu.cn
  • 作者简介:苏杭(1995— ),男,博士,工程师,研究方向为溶液结晶;E-mail:wieei6375@163.com
  • 基金资助:
    国家重点研发计划资助项目(2022YFD2100402)

Study on crystallization kinetics of manganese sulfate monohydrate in H2SO4-H2O binary system

SU Hang(), SONG Jitian(), HUANG Zhiqiang, DONG Qing, ZHANG Yaxiong   

  1. Tianjin Key Laboratory of Integrated Design and On?line Monitoring for Light Industry & Food Machinery and Equipment,College of Mechanical Enginnering,Tianjin University of Science and Technology,Tianjin 300222,China
  • Received:2023-11-09 Published:2024-08-10 Online:2024-09-26

摘要:

为提高一水硫酸锰晶体产品质量,指导一水硫酸锰结晶过程设计,使用动态法测定了一水硫酸锰在H2SO4-H2O二元体系中的溶解度,利用Apelblat方程对溶解度进行了拟合,得到了Apelblat方程各参数与pH的关系,结果表明在H2SO4-H2O二元体系中一水硫酸锰饱和溶解度随体系pH的降低迅速下降。在MSMPR结晶系统中测定了不同pH下一水硫酸锰晶体成核与生长速率,结果表明,pH的降低对一水硫酸锰晶体生长有显著促进作用,对晶体成核有抑制作用。以粒数衡算方程为基础对一水硫酸锰晶体的成核与生长速率进行计算,获得了不同pH条件下的成核与生长速率方程,并利用POLY2D方程对一水硫酸锰晶体成核与生长速率进行了拟合。该研究成果可为一水硫酸锰工业结晶过程设计提供参考。

关键词: 溶解度, 一水硫酸锰, 晶体成核, 晶体生长

Abstract:

In order to improve the quality of monohydrate manganese sulfate crystal products and guide the design of monohydrate manganese sulfate crystallization process,the solubility data of monohydrate manganese sulfate in the H2SO4-H2O binary system was measured by dynamic method.The solubility data was fitted using the Apelblat equation,and the relationship between the parameters of the Apelblat equation and pH value was obtained.The solubility data showed that in the H2SO4-H2O binary system,the saturation solubility of manganese sulfate monohydrate was rapidly decreased with the decrease of system pH.The nucleation and growth rates of monohydrate manganese sulfate crystals were measured at different pH values in the MSMPR crystallization system.The results showed that a decrease in pH had a significant promoting effect on the growth of monohydrate manganese sulfate crystals and an inhibitory effect on crystal nucleation.Based on the particle balance equation,the nucleation and growth rates of monohydrate manganese sulfate crystals were calculated,and the nucleation and growth rate equations under different pH conditions were obtained.Finally,the POLY2D equation was used to fit the nucleation and growth rates of manganese sulfate monohydrate crystals.The relevant research results could provide reference for the design of industrial crystallization process of manganese sulfate monohydrate.

Key words: solubility, manganese sulfate monohydrate, crystal nucleation, crystal growth

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