Preparation of sulfate free glycolic acid ester

Details Preparation of sulfate free glycolic acid ester Preparation of sulfate free glycolic acid ester

1978-03-30

1979-02-20

Evans, Joseph E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

560189, C07C 3120, C07C 6700, C07C 6748

Patent

active

041408667

ABSTRACT:
Sulfate is removed from glycolic acid, prepared by the sulfuric acid catalyzed carbonylation of formaldehyde and intended for use as an intermediate in the production of ethylene glycol by catalytic hydrogenation by treating the glycolic acid with alkali metal hydroxide or carbonate, and esterifying the glycolic acid; the alkali metal sulfate being substantially completely precipitated in and separated from the esterification product.

REFERENCES:
patent: 2211625 (1940-08-01), Loder
patent: 2285448 (1942-06-01), Loder
patent: 2315168 (1943-03-01), Urguhart
patent: 2350964 (1944-06-01), Loder et al.
patent: 2443482 (1948-06-01), Shattuck
patent: 2568619 (1951-09-01), Gregory
patent: 4087470 (1978-05-01), Suzuki

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