Korea Institute of Science and Technology

Ji Sik Choi

Hyun Joo Lee

Sang Deuk Lee

Byoung Sung Ahn

Chang Soo Kim

Hoon Sik Kim

Hye Jin Lee

Hyejeong Lee

Jungho Jae

Seung Rok Lim

Kean Im Lee

A method for preparing glycidol using glycerol includes mixing glycerol with urea in the presence of at least one zinc-based catalyst selected from the group consisting of Zn(NO), ZnCl, ZnO and Zn(OAc)under a pressure of 0.5-10 kPa at a temperature of 100-170&#xb0; C. to obtain glycerol carbonate; filtering the glycerol carbonate mixed with the zinc-based catalyst through an adsorbent including a polymer resin coordinated with amine groups to separate the zinc-based catalyst and glycerol carbonate from each other; and carrying out reaction of the glycerol carbonate separated from the zinc-based catalyst in the presence of an anion alkali metal salt catalyst that is Na, K, Rb, Cs or a mixture thereof containing at least one anion selected from the group consisting of Cl, Br, I, NO, NOand acetate under a pressure of 0.13-6.67 kPa at a temperature of 140-250&#xb0; C. to obtain glycidol.

Method for preparing glycidol using glycerol and glycidol obtained thereby

Disclosed is a method for producing glycidol by successive catalytic reactions. The method includes a series of reactions for the preparation of glycerol carbonate from glycerol and the decarboxylation of the glycerol carbonate. Specifically, the method includes i) reacting glycerol with a dialkyl carbonate to prepare glycerol carbonate, and ii) subjecting the glycerol carbonate to decarboxylation wherein a base is added as a catalyst in step i) and is allowed to react with an acid to form a metal salt after step i), and the salt is used as a catalyst in step ii). According to the method, inexpensive and easy-to-purchase acid and base catalysts can be used to produce glycidol from glycerol, a by-product of biodiesel production, as a starting material in high yield with high selectivity in a convenient, simple, and environmentally friendly way. In addition, the method eliminates the need to separate the base catalyst.

Method for producing glycidol by successive catalytic reactions

Disclosed is a method for producing glycidol by decarboxylation of glycerol carbonate. In the method, an ionic liquid catalyst is added for the reaction. According to the method glycidol can be produced in high yield and selectivity. The method enables the production of glycidol in an easy, simple and environmentally friendly way.

Method for producing glycidol

Disclosed is an sorbent for removing sulfur dioxide (SO) contained in combustion flue gases or in the atmosphere by using a diamine-based ionic liquid or a diamine compound supported by a polymer resin. To be specific, the present invention relates to a method of using a tertiary diamine compound immobilized on a polymer surface as a SOsorbent and also relates to a novel sorbent for absorbing or adsorbing a sulfur dioxide hydrate (SO.HO) formed by a bond between SOand water.

Sulfur dioxide and/or sulfur dioxide hydrate absorbent

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Seoul, South Korea

Ji Sik Choi