对于Na2CO3的新工艺,从Na2SO4生产,基于模拟Na2SO4-(NH4) 2SO4-MEA-MEG-H2O系统
Binghui Li1, Edouard Asselin1, Zhibao Li2
1Department of Materials Engineering, The University of British Columbia, 309-6350 Stores Road, Vancouver, British Columbia V6T 1Z4, Canada.
ACS omega
|January 15, 2024
概括
一种新的灰 (Na2CO3) 生产方法使用硫酸 (Na2SO4) 和抗溶剂结晶. 该工艺为传统的Mirabilite-Solvay工艺 (MSP) 提供了一种节能替代方案.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 工业化学 工业化学 工业化学
- 材料科学 材料科学 材料科学
背景情况:
- 传统的Mirabilite-Solvay工艺 (MSP) 用于生产苏打灰是能源密集型的.
- 需要采用替代的,更节能的方法,从硫酸 (Na2SO4) 中生产苏打灰 (Na2CO3).
研究的目的:
- 展示一种从硫酸中生产苏打灰的新工艺.
- 开发一种节能替代传统的Mirabilite-Solvay工艺.
主要方法:
- 从混合的单乙醇胺 (MEA) 和单乙烯糖醇 (MEG) 溶液中未反应的硫酸 (Na2SO4) 的抗溶剂结晶.
- 使用电解质非随机双液体 (E-NRTL) 模型测量和建模Na2SO4和 (NH4) 2SO4溶解度.
- 缩的Na2SO4盐与CO2和NH3发生反应,产生苏打灰.
主要成果:
- 成功演示了一种使用硫酸作为原料生产苏打灰的新工艺.
- 通过在MEA-MEG溶液中的抗溶剂结晶,实现了未发生反应的Na2SO4与可溶的 (NH4) 2SO4的分离.
- 产生的无水密苏打灰,散装密度高达1146kg/m3.
结论:
- 开发的工艺为从硫酸中生产苏打灰提供了可行和节能的替代方案.
- 在MEA-MEG溶液中的抗溶剂结晶对于分离关键成分是有效的.
- 该过程产生高密度无水灰.
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