Purification of alkyl glyoxylate in a continuous column by azeot

Details Purification of alkyl glyoxylate in a continuous column by azeot Purification of alkyl glyoxylate in a continuous column by azeot

1988-02-18

1989-04-11

Lacey, David L.

Distillation: processes, separatory

With measuring, testing or inspecting

Of temperature or pressure

203 14, 203 67, 203 69, 203 70, 203 82, 203 84, 203 99, 203DIG18, 203DIG19, 560177, 560186, B01D 336, B01D 342, C07C 6966

Patent

active

048203858

ABSTRACT:
An improved process for separating high purity alkyl glyoxylate from complex mixtures containing alkyl glyoxylate, alkyl glycolate, water, alcohol and miscellaneous impurities by an azeotropic distillation operation using an azeotroping agent selected from the group consisting of methylene dichloride, 1,1,1--trichloroethane, and benzene.

REFERENCES:
patent: 3404175 (1968-10-01), Mercier
patent: 3432401 (1969-03-01), Tcherkawsky
patent: 3681434 (1972-08-01), Neely
patent: 4144226 (1979-03-01), Crutchfield et al.
patent: 4156093 (1979-05-01), Christidis
patent: 4234739 (1980-11-01), Photis et al.
patent: 4250328 (1981-02-01), Fujita et al.
patent: 4340748 (1982-07-01), Baltes et al.
patent: 4502923 (1985-03-01), Dyroff et al.
patent: 4661208 (1987-04-01), Honma et al.
"A Simple and Efficient Synthesis of Ethyl and Methyl Glyoxylate", James M. Hook, Synthetic Communications, 14(1), 83-87 (1984).

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