| abstract |
The present invention relates to a process for preparing anhydrosugar alcohol from a hydrogenated sugar as a raw material, and more particularly, to a process for producing anhydrosugar alcohol by converting anhydride sugar (for example, hexitol) A method for producing a high purity, free alcohol without distillation by distillation of a liquid resulting from the conversion reaction and crystallization of the distillation resultant in a solvent, characterized in that the crystallization solvent is removed from the crystallization mother liquor generated in the crystallization step, And the result of the conversion reaction, it is possible to improve the total yield of the alcohol-free alcohol by improving the flowability of the distillate, thereby increasing the efficiency of distillation and further reducing the amount of waste generated and the cost of treatment And a technique capable of producing a high-purity, high-purity, high-purity alcohol without sugar. |