Method for manufacturing 2,3-butanediol

Patent metadata

Field	Value
Publication number	US-9975827-B2
Application number	US-201415327941-A
Country	US
Kind code	B2
Filing date	Jul 23, 2014
Priority date	Jul 23, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

The invention relates to a process for manufacturing 2,3-butanediol by hydrogenation of acetoin using a heterogeneous hydrogenation catalyst and under conditions leading to a selectivity higher than 90%. In a preferred embodiment, the hydrogenation is carried out in the presence of no solvent or in the presence of a solvent like water or 2,3-butanediol.

First claim

The invention claimed is:

1. A process for manufacturing 2,3-butanediol by hydrogenation of acetoin with hydrogen in the presence of a heterogeneous hydrogenation catalyst, in the absence of any carboxylic acid, and (i) in the presence of 2,3-butanediol solvent, or (ii) in the absence of any solvent except for acetoin; wherein the heterogeneous hydrogenation catalyst is Ni or a heterogeneous catalyst supported noble metal.

2. The process according to claim 1 , wherein the noble metal is selected from the group consisting of Ru, Pt, Rh, Pd, and their mixtures.

3. The process according to claim 2 where the noble metal is Ru or Pt.

4. The process according to claim 1 wherein the support is selected from the group consisting of carbon, graphite, graphene, graphene oxide, alumina, silica and their mixtures.

5. The process according to claim 1 wherein the support is carbon or alumina.

6. The process according to claim 1 wherein the heterogeneous catalyst is selected from the group consisting of ruthenium supported on carbon, platinum supported on carbon, ruthenium supported on alumina, and platinum supported on alumina.

7. The process according to claim 1 wherein the heterogeneous supported noble metal catalyst is palladium supported on carbon or palladium supported on alumina.

8. The process according to claim 1 wherein the hydrogenation is carried out at a partial hydrogen pressure from 1 to 10 MPa.

9. The process according to claim 1 wherein the hydrogenation is carried out at a partial hydrogen pressure from 2 to 8 MPa.

10. The process according to claim 1 , wherein the hydrogenation is carried out at a partial hydrogen pressure from 2 to 5 MPa.

11. The process according to claim 1 wherein the hydrogenation reaction is performed at temperatures in the range from room temperature to 200° C.

12. The process according to claim 1 wherein the hydrogenation reaction is performed at temperatures in the range from 50° C. to 175° C.

13. The process according to claim 1 wherein the hydrogenation reaction is performed temperatures in the range from 50° C. to 125° C.

14. The process according to claim 1 , wherein the catalyst concentration is from 0.005 wt % to 0.5 wt %, based on the amount of active metal relative to that of acetoin.

15. The process according to claim 1 wherein the catalyst concentration is from 0.01 wt % to 0.5 wt %, based on the amount of active metal relative to that of acetoin.

16. The process according to claim 1 wherein the catalyst concentration is from 0.01 wt % to 0.25 wt %, based on the amount of active metal relative to that of acetoin.

17. A process according to claim 1 which further comprises a step of filtering off the heterogeneous hydrogenation catalyst.

Assignees

• Fundacion Tecnalia Res & Innovation

Inventors

• Ochoa Gomez Jose Ramon
• Gil Rio Silvia
• Rio Perez Francisca
• Lorenzo Ibarreta Leire
• Dineiro Garcia Cristina
• Roncal Martinez Tomas

Classifications

• C07C29/145 Primary

  with hydrogen or hydrogen-containing gases · CPC title

• C07C31/207

  1,4-Butanediol; 1,3-Butanediol; 1,2-Butanediol; 2,3-Butanediol · CPC title

• B01J23/42

  Platinum · CPC title

• B01J23/755

  Nickel · CPC title

• B01J23/44

  Palladium · CPC title