Method for preparing diether of anhydrosugar alcohol with improved yield

摘要

The present invention relates to a method of preparing a dieter of anhydrosugar alcohol, and more particularly, in preparing a dieter of anhydrosugar alcohol by reacting an anhydrosugar alcohol with an alkylating reagent (eg, dimethyl sulfate or methyl chloride) , By reacting the monoether of anhydrosugar alcohol with an alkylating reagent together with anhydrosugar alcohol, the yield can be improved compared to the case where the anhydrosugar alcohol is reacted with the alkylating reagent alone, and the source of the monoether of the anhydrosugar alcohol As a result, it is possible to use distillation by-products generated during the diether purification of anhydrosugar alcohol, thereby reducing process waste and reducing process costs.