Method for producing highly pure anhydrosugar alcohols with improved yield by using purification product of waste generated from crystallization procedure

摘要

the present invention is a hydrogenated sugar as a raw material and alcohol-free allowance (anhydrosugar alcohol) to relates to the manufacturing technology, and more specifically, per hydrogenation by adding an acid (e. g., hexitol) was converted to the anhydrosugar alcohol, and then distilling the conversion result solution, to crystallize the distillation results solution in a solvent of high purity A method for producing a anhydrosugar alcohol, the results obtained after the purification remove the crystallization solvent from the crystallization mother liquor generated in the crystallization phase (mother liquor), (1) In the crystallization step in the distillation results of the liquid or (2) after the crystallization step by the input to the refining stage it is possible to improve the overall yield of the anhydrosugar alcohol, and even waste generation and processing costs can be reduced, at low cost, to a capable of producing a highly pure anhydrosugar alcohol with high efficiency techniques. ;