Method of recycling mother liquid of pure terephthalic acid (PTA) refining unit

The present invention relates to a method of recycling mother liquid of a PTA refining unit. The present invention recycles waste heat and PT acids of a PTA mother liquid to effectively utilize heat in the PTA mother liquid, solves influence of crystallization of the PT acids on subsequent system, r...

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Bibliographic Details
Main Authors Zhao, Xu, Shen, Tao, Han, Dongzhao, Wang, Tianbao, Xu, Lilong, Jia, Min, Xie, Xiaoling, Lu, Yuanrui, Qiu, Yongning, Zhang, Wanyao
Format Patent
LanguageEnglish
Published 29.09.2020
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:The present invention relates to a method of recycling mother liquid of a PTA refining unit. The present invention recycles waste heat and PT acids of a PTA mother liquid to effectively utilize heat in the PTA mother liquid, solves influence of crystallization of the PT acids on subsequent system, reduces pollution to the environment, and can produce huge economic benefits by using high efficient multistage flash distillation technology, low temperature cogeneration technology, heat pump heating and cooling technology, and low temperature crystallization technology.
Bibliography:Application Number: US201716330230