DISTILLATION OF REACTIVE METHYL GLYOXYLATE-METHYL GLYCOLATE MIXTURES

被引：2

作者：

COVA, DR

THORMAN, JM

机构：

[1] Detergents and Phosphates Division, Monsanto Company, 800 N. Lindbergh Blvd. St. Louis, 63167, MO

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 1990年 / 25卷 / 13-15期

关键词：

D O I：

10.1080/01496399008050438

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A process for refining methyl glyoxylate produced via air-oxidation of methyl glycolate is described. This is a unique separation as methyl glyoxylate reacts reversibly with several impurities in the reaction effluent (i.e., water, methanol and methyl glycolate). Separating water and methanol is accomplished using differences in volatilities and reaction equilibria. Azeotropic distillation is of particular importance in reducing water to specification levels. Separating methyl glycolate utilizes the effect of system pressure on volatility and reaction equilibrium. Recovery of methyl glycolate for recycle to oxidation is accomplished by passage through low-retention time stills.

引用

页码：1981 / 1991

页数：11