Hydrogen fluoride removal from glycolic acid

Details Hydrogen fluoride removal from glycolic acid Hydrogen fluoride removal from glycolic acid

1978-08-07

1980-02-12

Helfin, Bernard

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

Organic compounds

Carboxylic acids and salts thereof

560179, C07C 5906

Patent

active

041884949

ABSTRACT:
The concentration of hydrogen fluoride in crude glycolic acid made by the hydrogen fluoride-catalyzed reaction of formaldehyde and carbon monoxide can be reduced to less than about 1% by weight by removing the HF from the crude gylcolic acid by distillation or stripping with inert gas at a temperature above about 130.degree. C., thereby producing a polyglycolide subsequently convertible to glycolic acid by hydrolysis.

REFERENCES:
patent: 3911003 (1975-10-01), Suzuki
patent: 3962343 (1976-06-01), Fujiyama et al.
Kirk-Othmer, "Encyclopedia of Chemical Technology", 2nd ed., 1966, vol. 9, p. 617.
Mahin, Edward G., "Quantitative Analysis", McGraw Hill Publ., (1924), pp. 25-28.
Lundell, G. E. F. et al., "Applied Inorganic Analysis", 2nd Ed., (1953), John Wiley & Sons Publ., at p. 102.

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