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1. 发明授权

US4939297A Extraction process for removal of impurities from terephthalic acid filtrate 失效
标题翻译：从对苯二甲酸滤液中除去杂质的萃取方法
公开(公告)号：US4939297A
公开(公告)日：1990-07-03
申请号：US361176
申请日：1989-06-05
申请人： Larry W. Browder , James C. Medlin , Art T. Spaugh, Jr.
发明人： Larry W. Browder , James C. Medlin , Art T. Spaugh, Jr.
IPC分类号： C07C63/26 , B01J31/40 , C07C51/42 , C07C51/48
CPC分类号： C07C51/42 , C07C51/48 , Y02P20/52
摘要： A method for removing impurities from an oxidative terephthalic acid synthesis mother liquor containing acetic acid, water, corrosion metals, a metal catalyst and organic impurities, comprising the steps of (a) removing from the mother liquor by evaporation from 50-95% of the acetic acid and water contained therein; (b) adding an amount of water to the concentrated mother liquor sufficient to dissolve the metal catalyst and form an aqueous mixture; (c) extracting the aqueous mixture by counter-current extraction with a substantially water-insoluble organic solvent, to produce a lighter phase containing the organic solvent, a minor amount of the water, acetic acid and the organic impurities and a heavier phase containing a major amount of the water, corrosion metals and the metal catalyst, and; (d) removing the corrosion metals from the heavier phase by heating and filtering, and; (e) removing the organic impurities from the lighter phase by distillation.
摘要翻译：一种从含有乙酸，水，腐蚀金属，金属催化剂和有机杂质的氧化对苯二甲酸合成母液中除去杂质的方法，包括以下步骤：（a）通过蒸发从母液中除去50-95％其中含有乙酸和水; （b）向浓缩母液中加入足够量的水以溶解金属催化剂并形成含水混合物; （c）通过用基本上不溶于水的有机溶剂逆流萃取来提取含水混合物，以产生含有有机溶剂，少量水，乙酸和有机杂质的较浅相，以及含有主要量的水，腐蚀金属和金属催化剂，以及; （d）通过加热和过滤从较重的相中除去腐蚀金属; （e）通过蒸馏从较轻的相中除去有机杂质。

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