Process for producing polyhydric alcohol

Patent metadata

Field	Value
Publication number	US-10029965-B2
Application number	US-201414896210-A
Country	US
Kind code	B2
Filing date	Jun 3, 2014
Priority date	Jun 4, 2013
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A process for producing a polyhydric alcohol includes a step (I) of hydrogenating hemiacetal having a specific structure to obtain a reaction solution (I), and a step (II) of adding water to the reaction solution (I) obtained in the step (I) and further conducting hydrogenation.

First claim

The invention claimed is:

1. A process for producing a polyhydric alcohol, comprising:
(I) hydrogenating a hemiacetal represented by a formula (1-1) or (1-2) to obtain a reaction solution; and
(II) adding water to the reaction solution obtained in (I) and further conducting a hydrogenation:

wherein R 11 to R 17 each independently represent a hydrogen atom, an alkyl group or aryl group which may have a functional group, provided that not all of R 11 to R 17 represent a hydrogen atom;

wherein R 21 to R 29 each independently represent a hydrogen atom, an alkyl group or aryl group which may have a functional group.

2. The process of claim 1 , wherein an amount of water added in (II) is 1 mol times or more based on by-products in the reaction solution and from 20 to 100 mass % based on the reaction solution.

3. The process of claim 1 , wherein the hydrogenation in (II) is conducted in the presence of a hydrogenation catalyst, the hydrogenation catalyst is a heterogeneous catalyst, and a carrier of a metal is selected from the group consisting of silica, alumina and diatomaceous earth.

4. The process of claim 2 , wherein the hydrogenation in (II) is conducted in the presence of a hydrogenation catalyst, the hydrogenation catalyst is a heterogeneous catalyst, and a carrier of a metal is selected from the group consisting of silica, alumina and diatomaceous earth.

Assignees

• Kuraray Co

Inventors

• Okano Shigeru
• Yada Kazuyuki
• Suzuki Yutaka

Classifications

• C07C29/132 Primary

  by reduction of an oxygen containing functional group · CPC title

• C07C29/88

  by treatment giving rise to a chemical modification of at least one compound (chemisorption C07C29/76) · CPC title

• C07C31/20

  Dihydroxylic alcohols · CPC title