Tall oil derived glycidyl esters and process of making the same
OwnerBing Wang, Mitra Shiran Ganewattainventors
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Abstract
Presently described are methods for preparing glycidyl esters. The methods described herein provide quantitative conversion of carboxylic acid substrates to halohydrin intermediates using a small excess of epihalogenhydrin and performing the ring-closing step at a temperature of up to 30° C. unexpectedly reduce the formation of side-products in the ring-closing step. The described methods are also applicable to rosin derivatives and fatty acid derivatives. Utilizing these glycidyl esters as raw material, glycidyl ester derivatives with improved purity can be made.
Claims20
A method for the preparation of a glycidyl ester, the method comprising the steps of
- a. admixing (i) a carboxylic acid substrate comprising a rosin acid or derivative thereof, a fatty acid or derivative thereof, or a combination thereof, (ii) a catalyst, and (iii) a molar excess of an epihalogenhydrin based on the total moles of carboxylic acid groups;
- b. heating the reaction mixture at a temperature from about 60° C. to about 125° C. to form a halohydrin intermediate;
- c. combining the reaction mixture comprising the halohydrin intermediate from step (b) with a basic solution comprising an inorganic base, and water;
- and
- d. allowing the reaction to proceed at a temperature of up to about 30° C. to provide the glycidyl ester.
Dependencies are inferred from the claim text.