Phase Diagram for the Na2SO4−(NH4)2SO4−MEA−H2O System at Elevated Temperature
Phase Diagram for the Na2SO4−(NH4)2SO4−MEA−H2O System at Elevated Temperature
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DOI：
10.1021/acs.jced.1c00133
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发表时间：
2021
影响因子：
--
通讯作者：
Li Zhibao
中科院分区：
文献类型：
--
作者：
Li Binghui;Li Zhibao
ABSTRACT: It is essential to develop a new antisolvent technology for soda.ash manufacture by the use of sodium sulfate as raw material due to intensive.energy consumption for the separation of sodium sulfate from ammonia sulfatebearing.liquor by filtering sodium bicarbonate. Phase diagram data for the.Na2SO4−(NH4)2SO4−monoethanolamine (MEA)−H2O system was determined.and modeled to regress the paired-ion interactions included in the.mixed-solvent electrolyte model with good accuracy. It was found that the.solubility of Na2SO4 in MEA solution sharply decreases with the concentration.of MEA, while the addition of MEA as the solvent largely enhances the solubility.of (NH4)2SO4 in solution. These findings show that sodium sulfate may be.efficiently separated from ammonia sulfate solution with the help of MEA.antisolvent technology.
