Method for preparing hydrogenation catalyst and method for preparing diols from lactones using the hydrogenation catalyst

Patent metadata

Field	Value
Publication number	US-9381498-B2
Application number	US-201514680405-A
Country	US
Kind code	B2
Filing date	Apr 7, 2015
Priority date	Jul 31, 2014
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A method for preparing a hydrogenation catalyst by mixing a copper salt with colloidal silica to form a precipitate, washing the formed precipitate to remove anions of the copper salt from the precipitate, and impregnating the anion-removed precipitate with an alkali metal to form a hydrogenation catalyst; and a method for preparing a diol from a lactone using the hydrogenation catalyst.

First claim

What is claimed is:

1. A method for preparing a hydrogenation catalyst, the method comprising:
mixing a copper salt with colloidal silica to form a precipitate;
washing the precipitate to remove an anion of the copper salt from the precipitate; and
impregnating the precipitate with an alkali metal to provide a hydrogenation catalyst.

2. The method of claim 1 , wherein the copper salt comprises Cu(NO 3 ) 2 , CUCl 2 , Cu(CH 3 COO) 2 , CuSO 4 , or a combination thereof.

3. The method of claim 1 , wherein the precipitate is formed at a pH value of about 8.5 to about 11.

4. The method of claim 1 , wherein the copper salt and colloidal silica are mixed in amounts that provide a weight ratio of Cu to SiO 2 of about 5:1 to about 3:1.

5. The method of claim 1 , wherein the alkali metal is lithium, sodium, potassium, rubidium, cesium, or a combination thereof.

6. The method of claim 1 , wherein the precipitate is impregnated with the alkali metal in an amount equal to about 1/20 th to about ¼ th of the weight of SiO 2 of the colloidal silica to be mixed with the copper salt.

7. The method of claim 1 , further comprising drying the precipitate before the impregnating of the precipitate with the alkali metal.

8. The method of claim 1 , further comprising drying and calcining the precipitate after impregnating the precipitate with the alkali metal.

9. A method for preparing a diol from a lactone, the method comprising reacting a lactone and hydrogen in the presence of the hydrogenation catalyst prepared by the method of claim 1 to form a diol.

10. The method of claim 9 , wherein the lactone is y-butyrolactone (GBL), β-propiolactone, δ-valerolactone, ε-caprolactone, α-angelica lactone, β-angelica lactone, γ-valerolactone (GVL), or a combination thereof.

11. The method of claim 9 , wherein the reaction is performed at a temperature of about 140° C. to about 250° C.

12. The method of claim 9 , wherein the reaction is performed at a pressure of about 35 atm to about 65 atm.

13. The method of claim 9 , wherein the reaction is performed at a weight hourly space velocity (WHSV) of about 0.3/hr to about 1.5/hr.

14. The method of claim 9 , wherein the reaction is performed with a molar ratio of hydrogen to lactone of about 30:1 to about 100:1.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Heo Hyeonsu
• Lee Jongmin
• Lee Kyunghae
• Chwae Jun
• Lee Mooho

Classifications

• B01J37/0201

  Impregnation · CPC title

• B01J37/06

  Washing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• C07C29/143

  of ketones · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• B01J23/78 Primary

  with alkali- or alkaline earth metals · CPC title