New Process for Na2CO3 Production from Na2SO4 Based on Modeling the Na2SO4-(NH4)2SO4-MEA-MEG-H2O System

被引：2

作者：

Li, Binghui ^{[1
]}

Asselin, Edouard ^{[1
]}

Li, Zhibao ^{[2
]}

机构：

[1] Univ British Columbia, Dept Mat Engn, Vancouver, BC V6T 1Z4, Canada

[2] Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China

来源：

ACS OMEGA | 2023年 / 9卷 / 01期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

AMMONIUM-SULFATE; ETHYLENE-GLYCOL; CO2; ALUMINUM; WATER;

D O I：

10.1021/acsomega.3c07533

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alternative means for soda ash (Na2CO3) production from sodium sulfate (Na2SO4) are needed due to the intensive consumption of energy in the conventional Mirabilite-Solvay process (MSP). We demonstrate a new process to produce soda ash using sodium sulfate as a feed material. The new process relies on the antisolvent crystallization of unreacted Na2SO4 to separate it from soluble (NH4)(2)SO4 in a mixed monoethanolamine (MEA) and monoethylene glycol (MEG) solution. To develop the process, the solubilities of Na2SO4 and (NH4)(2)SO4 solids in aqueous mixed MEA-MEG solutions were first measured and then modeled using regressed paired-ion interactions from the electrolyte nonrandom two-liquid (E-NRTL) model. Anhydrous dense soda ash with a bulk density of up to 1146 kg/m(3) was obtained when the concentrated Na2SO4 brines reacted with CO2 and NH3.

引用

页码：1265 / 1277

页数：13

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