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    • 7. 发明授权
    • Extraction process for removal of impurities from mother liquor in the synthesis of carboxylic acid
    • 在合成羧酸时从母液中除去杂质的提取过程
    • US07381386B2
    • 2008-06-03
    • US10455018
    • 2003-06-05
    • Robert LinMarcel de Vreede
    • Robert LinMarcel de Vreede
    • C07C51/00
    • C07C51/42C07C51/48Y02P20/52C07C63/26
    • A method for removing impurities from a mother liquor comprising a carboxylic acid, a metal catalyst, impurities by (a) evaporating the mother liquor comprising a carboxylic acid, a metal catalyst, impurities and a solvent in a first evaporator zone to produce a vapor stream and a concentrated mother liquor stream; (b) evaporating the concentrated mother liquor stream in a second evaporator zone to form a solvent rich stream and a super concentrated mother liquor stream; (c) mixing in a mixing zone a water-solvent solution and optionally an extraction solvent with the super concentrated mother liquor stream to form an aqueous mixture; (d) optionally separating organic impurities from the aqueous mixture in a solid-liquid separation zone to form a purified aqueous mixture; and (e) extracting the aqueous mixture or purified aqueous mixture with an extraction solvent in an extraction zone to form an extract stream and the raffinate stream.
    • 一种通过(a)在第一蒸发区中蒸发包含羧酸,金属催化剂,杂质和溶剂的母液,从含有羧酸,金属催化剂,杂质的母液中除去杂质的方法,以产生蒸气流 和浓浓的母液流; (b)在第二蒸发器区域蒸发浓缩的母液流以形成富溶剂流和超浓缩母液流; (c)在混合区中将水溶剂溶液和任选的萃取溶剂与超浓缩母液流混合以形成含水混合物; (d)任选地在固液分离区中从含水混合物中分离出有机杂质以形成纯化的含水混合物; 和(e)在提取区中用提取溶剂萃取含水混合物或纯化的含水混合物以形成提取物流和萃余液流。