Process for increasing the production or recovery yields of hemi

Details Process for increasing the production or recovery yields of hemi Process for increasing the production or recovery yields of hemi

1978-03-13

1979-05-22

Helfin, Bernard

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

Organic compounds

Carboxylic acid esters

560180, 562580, 562587, C07C 6966

Patent

active

041560930

ABSTRACT:
The process comprises the hot treatment at a temperature of 80.degree. to 160.degree. C. by an amount of 5 to 50% of 85% of phosphoric acid, of the residues resulting from the distillation of reaction media containing hemiacetal-esters under substantially anhydrous conditions. These reaction media are selected from among those resulting from the reaction of alcohols and glyoxylic acid and those resulting from the treatment of glyoxylic hemiacetal-esters with P.sub.2 O.sub.5.

REFERENCES:
patent: 3911003 (1975-10-01), Suzuki
Prey, V. "Die Spaltung von Phenolaethern mit Pyridiniumsalzen. . . ", Berichte der Deutschen Chemischen Gesellschaft. (1942), pp. 541-542.
Kirk-Othmer, "Encyclopedia of Chemical Technology", vol. 8, p. 326, 2nd Ed. (1966), Interscience Publ.

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