Process for the conversion of sugars to lactic acid and 2-hydroxy-3-butenoic acid or esters thereof comprising a metallo-silicate material and a metal ion

Patent metadata

Field	Value
Publication number	US-9573123-B2
Application number	US-201414910319-A
Country	US
Kind code	B2
Filing date	Aug 15, 2014
Priority date	Aug 20, 2013
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A process for the preparation of lactic acid and 2-hydroxy-3-butenoic acid or esters thereof from a sugar in the presence of a metallo-silicate material, a metal ion and a solvent, wherein the metal ion is selected from one or more of the group consisting of potassium ions, sodium ions, lithium ions, rubidium ions and caesium ions.

First claim

The invention claimed is:

1. A process for the preparation of lactic acid and 2-hydroxy-3-butenoic acid or esters thereof from a sugar in the presence of a metallo-silicate material, a metal ion and a solvent, said process comprising contacting the sugar with a metallo-silicate material, wherein the metal ion is selected from one or more of the group consisting of potassium ions, sodium ions, lithium ions, rubidium ions and caesium ions.

2. A process according to claim 1 , wherein the metal ion is obtainable by the addition to the process of one or more compounds selected from the group consisting of K 2 CO 3 , KNO 3 , KCl, potassium acetate (CH 3 CO 2 K), potassium lactate (CH 3 CH(OH)CO 2 K), Na 2 CO 3 , Li 2 CO 3 and Rb 2 CO 3 .

3. A process according to claim 1 , wherein the metallo-silicate material framework structure is selected from the group consisting of BEA, MFI, FAU, MOR, FER, MCM and SBA.

4. A process according to claim 1 , wherein the metallo-silicate material comprises an active metal selected from one or more of the group consisting of Sn, Ti, Pb, Zr, Ge and Hf.

5. A process according to claim 1 , wherein the metallo-silicate material is selected from the group consisting of Sn-BEA, Sn-MFI, Sn-FAU, Sn-MCM-41 and Sn-SBA-15.

6. A process according to claim 1 , wherein the sugar is selected from one or more of the group consisting of glucose, fructose, mannose, sucrose, xylose, erythrose, erythrulose, threose and glycolaldehyde.

7. A process according to claim 1 , wherein the solvent is selected from one or more of the group consisting of methanol, ethanol, 1-propanol, 1-butanol and water.

8. A process according to claim 1 , wherein the ester of lactic acid is methyl lactate or ethyl lactate.

9. A process according to claim 1 , wherein the yield of methyl lactate is equal to or greater than 69%.

10. A process according to claim 1 , wherein the metallo-silicate material is prepared using a post synthesis process.

11. A process according to claim 1 , wherein the metallo-silicate material is prepared by impregnating a de-aluminated or de-boronated zeotype material or mesoporous amorphous silicate material with an active metal.

12. A process according to claim 1 , wherein the metallo-silicate material is prepared by impregnating a de-aluminated or de-boronated zeotype material or mesoporous amorphous silicate material with an active metal and a metal ion.

Assignees

• Haldor Topsoe As
• Haldor Topsie As

Inventors

• Holm Martin Spangsberg
• Sadaba Zubiri Irantzu
• Tolborg Søren
• Mårup Osmundsen Christian
• Taarning Esben

Classifications

• C07C67/00

  Preparation of carboxylic acid esters · CPC title

• C07C69/68

  Lactic acid esters · CPC title

• B01J29/088

  Y-type faujasite · CPC title

• B01J29/7057 Primary

  Zeolite Beta · CPC title

• B01J29/7049

  containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead · CPC title