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Method for preparing an anhydrosugar alcohol using hydrol

a technology of anhydrous alcohol and anhydrous sulfate, which is applied in the direction of organic compounds/hydrides/coordination complex catalysts, physical/chemical process catalysts, metal/metal-oxide/metal-hydroxide catalysts, etc., can solve the problems of high cost of catalyst and raw material used in dehydration reaction, low conversion rate, and low yield of distillation and purification. , the effect of reducing the cost of raw materials

Active Publication Date: 2015-11-19
SAMSANG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach reduces material costs and waste generation in glucose production while achieving equivalent or higher conversion rates compared to using highly pure sorbitol, thereby improving economic feasibility and reducing disposal costs.

Problems solved by technology

However, the conventional methods of producing anhydrosugar alcohol have limitations of high cost for the catalyst and raw material used in the dehydration reaction, low conversion rate, and low yields of distillation and purification, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027]Hydrol generated in glucose production (glucose content: 87% by weight) was subject to hydrogenation reaction using nickel catalyst under the condition of 125° C. temperature and 60 atm pressure to obtain a liquid product with a concentration of 56% by weight (sorbitol content: 85%).

[0028]3,000 g of the obtained liquid product of hydrogenation reaction of hydrol was fed into a batch reactor equipped with an agitator and concentrated by heating to 100° C. or higher. 17 g of sulfuric acid (Duksan Chemical) and 7 g of methanesulfonic acid (Duksan Chemical) were added thereto. The reactor was then heated to about 130° C., and dehydration reaction was conducted under a reduced pressure condition of about 45 mmHg for conversion to anhydrosugar alcohol. After the dehydration reaction was completed, the reaction mixture was cooled to 110° C. or lower, and about 45 g of 50% sodium hydroxide solution (Samjeon Pure Chemical) was added thereto to neutralize the resulting reaction liquid. ...

example 3

[0030]Other than the fact that 17 g of sulfuric acid and 6 g of boric acid instead of methanesulfonic acid were used, the process was conducted in the same manner as in Example 1. The conversion rate to anhydrosugar alcohol was 76.2% according to the analysis result.

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Abstract

The present invention relates to a method for preparing an anhydrosugar alcohol using hydrol (namely, a crystalline mother liquor remaining after obtaining crystalline glucose from a crude glucose liquor). More particularly, the present invention relates to a method for preparing an anhydrosugar alcohol in a method for performing a dehydration reaction on the hydrogenated sugar so as to convert the hydrogenated sugar to an anhydrosugar alcohol, wherein the method for preparing an anhydrosugar alcohol is configured to use, as at least a portion of the hydrogenated sugar, the product obtained from the hydrogenation of the hydrol which is a by-product or waste generated during the production of glucose, thus relatively lowering the cost for a material as compared with a case of using a high purity raw material (for example, high purity sorbitol), to thus improve economical advantages, and further reduce the amount of waste and cost for disposal of the waste during the production of glucose.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for producing anhydrosugar alcohol by using hydrol (i.e., the mother liquor remaining after obtaining glucose crystals from crude glucose liquid), and more specifically a method for producing anhydrosugar alcohol through converting hydrogenated sugar to anhydrosugar alcohol by dehydration reaction, wherein a product of hydrogenation reaction of hydrol—which is a byproduct or waste generated in glucose production—is used as at least a part of the hydrogenated sugar, thereby the cost for raw material can be relatively lowered as compared with the use of highly pure material (e.g., highly pure sorbitol) and thus the economic feasibility can be improved and the amount of waste generated in glucose production and the cost for disposal thereof can be reduced.BACKGROUND ART[0002]Hydrogenated sugar (also referred to as “sugar alcohol”) means a compound obtained by adding hydrogen to the reductive end group in sugar, and generall...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07C29/132
CPCC07C29/132B01J23/755B01J31/0225C07D493/04B01J2231/641B01J2231/643C07C31/26C07C29/34C07C31/18
Inventor RYU, HOONJUNG, YOUNG JAEKIM, JIN KYUNGKYUNG, DO HYUNPARK, HYUK MINCHO, SEONG HO
Owner SAMSANG CORP