发明名称 |
PROCESS FOR RECOVERING AND RECYCLING AN ACID CATALYST |
摘要 |
<p>Disclosed is a process for the extractive recovery of an acid catalyst from an aqueous mixture of glycolic acid with an extraction solvent comprising a tertiary amine or an onium carboxylate compound, a modifier, and a diluent. The acid catalyst, which can comprise strong acids such as sulfuric acid, alkyl sulfonic acids, and fluoroalkyl sulfonic acids, can be recovered by back extraction with aqueous formaldehyde and recycled to a process for the preparation of glycolic acid by the acid-catalyzed carbonylation of formaldehyde. Also disclosed is a process for the preparation of glycolic acid by the acid-catalyzed hydrocarboxylation of formaldehyde.</p> |
申请公布号 |
WO2013148497(A1) |
申请公布日期 |
2013.10.03 |
申请号 |
WO2013US33458 |
申请日期 |
2013.03.22 |
申请人 |
EASTMAN CHEMICAL COMPANY |
发明人 |
BARNICKI, SCOTT DONALD;FALLING, STEPHEN NEAL;KANEL, JEFFREY SCOTT;KLINE, ROBERT STERLING;MACKENZIE, PETER BORDEN;VETTER, ANDREW JAMES |
分类号 |
C07C303/44;C07C51/48;C07C315/06 |
主分类号 |
C07C303/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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