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发明公开
CN102344366A 两股溶剂侧线进料液液萃取提取丙烯酸丁酯的方法 无效 - 撤回

两股溶剂侧线进料液液萃取提取丙烯酸丁酯的方法
摘要：
本发明公开了一种两种溶剂侧线进料液液萃取萃取提取丙烯酸丁酯的方法，将含有丁醇、丁醚、丁氧基丙烯酸丁酯及水的丙烯酸丁酯物料在萃取塔中连续逆流萃取，以多元醇和水为萃取剂，多元醇和水分两股分别进入萃取塔，萃取剂与丙烯酸丁酯物料的质量比为0.5～2.5∶1，多元醇和水的质量比为1∶0.25～0.75，萃余液得到纯度99.9%以上的丙烯酸丁酯；萃取相经精馏分离，分离后多元醇和水分别循环使用。本发明方法能有效分离丙烯酸丁酯、丁醇、丁醚、丁氧基丙烯酸丁酯及水混合溶液，分离后丙烯酸丁酯纯度达99.9%以上，一次收率达98.5%以上。
摘要（英）：

The invention discloses a method for extracting butyl acrylate through liquid-liquid extraction of two side feed solvents. The method comprises the steps of: subjecting a butyl acrylate material containing butanol, butyl ether, butyl butoxyacrylate and water to continuous countercurrent extraction in an extraction tower with a polyol and water as extractants, introducing the two streams of polyol and water into the extraction tower respectively, with the extractants and the butyl acrylate material in a mass ratio of 0.5-2.5:1, the polyol and water in a mass ratio of 1:0.25-0.75, thus obtaining the raffinate, i.e. the butyl acrylate with purity over 99.9%; conducting distillation separation to the extraction phase so as to obtain the polyol and water which are recyclable respectively. The method of the invention can effectively separate a mixed solution of butyl acrylate, butanol, butyl ether, butyl butoxyacrylate and water, and the separated butyl acrylate can has purity up to over 99.9%, with a one-time yield of more than 98.5%.

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