Process for the isolation of alkyl glyoxylate

Details Process for the isolation of alkyl glyoxylate Process for the isolation of alkyl glyoxylate

1992-02-07

1993-06-08

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 42, 203 43, 203 80, 203 84, 560177, 560186, B01D 314, C07C 6966

Patent

active

052175820

ABSTRACT:
A process is provided for separating high purity alkyl glycolate from a gaseous reaction mixture resulting from the catalyzed gas phase oxidation of alkyl glycolate. A hot solvent which is immiscible with water but selectively dissolves alkyl glycolate and alkyl glyoxylate is brought in contact with the gaseous reaction mixture, and water and alcohol vapors are removed from the hot solvent. The alkyl glyoxylate is removed from the solution by a first distillation and the alkyl glycolate and solvent are then separated in a second distillation.

REFERENCES:
patent: 4502923 (1985-03-01), Dyroff et al.
patent: 4692547 (1987-09-01), Driscoll et al.
patent: 4814491 (1989-03-01), Driscoll et al.
patent: 4820385 (1989-04-01), Cova et al.
patent: 4867849 (1989-09-01), Cova et al.

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