Process for the preparation of hydroxypivalic acid

Details Process for the preparation of hydroxypivalic acid Process for the preparation of hydroxypivalic acid

1997-08-05

1998-09-01

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

C07C 51235

Patent

active

058012761

ABSTRACT:
Hydroxypivalic acid can be prepared by oxidation of hydroxypivalaldehyde with hydrogen peroxide by metering the hydrogen peroxide, as the oxidizing agent, into an aqueous hydroxypivalaldehyde reservoir in the temperature range from 60.degree. to 80.degree. C. such that a hydrogen peroxide concentration of 4% by weight, based on the total weight of the reaction mixture, is not exceeded, and ending the addition of hydrogen peroxide as soon as the concentration of hydroxypivalaldehyde in the reaction mixture falls below 1% by weight.

REFERENCES:
patent: 3799977 (1974-03-01), Rutledge
Monatshefte Fur Chemie 95 H.P. Frank, et al., Uher die Herstellung von Hydroxypivalinsaure und deren Polyester, pp. 410-414, (1964).
J.H. Payne, et al., The Oxidation of Aldehydes with Hydrogen Peroxide, vol. 63, pp. 226-228, (Jan. 1941).
H. Frank, et al., "Preparation of Hydroxypivalic Acid and Its Polyesters", Monatsh., 95, (2), 410-14, (1964), (abstract only from CA 61,12099).
H.P. Frank et al: "Uber die Herstellung von Hydroxypivalinsaure und deren Polyester" Monatshefte fur Chemie., vol. 95, 1964, pp. 410-414.
J.H. Payne et al.: "The oxidation of adehydes with hydrogen peroxide" Journal of the American Chemical Society., vol. 63, 1941 DC US, pp. 226-228.
Chemical Abstracts, vol. 71, No. 7, Aug. 18, 1969, Columbus, Ohio, US; abstract No. 30073j, Huang, Ching-Yun et al.: "2,2-dimethyl-3-hydroxypropionic acid" p. 248.

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