Catalyst for producing gamma-valerolactone, method for preparing the same and method for manufacturing gamma-valerolactone using the same

Patent metadata

Field	Value
Publication number	US-10335778-B2
Application number	US-201816043161-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Nov 6, 2017
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Disclosed are a heteropolyacid catalyst for producing gamma-valerolactone, which is supported on M-Beta zeolite (M=Sn, Ti, Zr or Hf), and a method for preparing the same and a method for manufacturing gamma-valerolactone using the catalyst. The catalyst has an effect of producing gamma-valerolactone from biomass-derived furfural at a high yield through a one-pot process.

First claim

What is claimed is:

1. A catalyst for producing gamma-valerolactone, comprising Beta zeolite substituted with a metal; and
a heteropolyacid supported on the zeolite.

2. The catalyst for producing gamma-valerolactone according to claim 1 , wherein the metal is one or more selected from Group 4 consisting of titanium (Ti), zirconium (Zr), and hafnium (Hf).

3. The catalyst for producing gamma-valerolactone according to claim 1 , wherein the metal is tin (Sn).

4. The catalyst for producing gamma-valerolactone according to claim 1 , wherein the zeolite substituted with a metal is prepared by a method including removing aluminum from Al-Beta zeolite and mixing the dealuminated Si-Beta zeolite with a metal precursor and then performing a heat treatment to substitute the zeolite skeleton with a metal.

5. The catalyst for producing gamma-valerolactone according to claim 1 , wherein the catalyst is for producing gamma-valerolactone from furfural.

6. The catalyst for producing gamma-valerolactone according to claim 1 , wherein a content of the metal is 1 to 10 wt % based on a total weight of the catalyst.

7. The catalyst for producing gamma-valerolactone according to claim 1 , wherein the heteropolyacid has a formula H n XM 12 O 40 where X is a center element of phosphorus (P), silicon (Si), germanium (Ge) or arsenic (As), M is a coordinating element including tungsten (W) or molybdenum (Mo), and n is an integer more than 0.

8. The catalyst for producing gamma-valerolactone according to claim 7 , wherein the heteropolyacid is one or more selected from the group consisting of 12-tungstophosphoric acid (H 3 PW 12 O 40 ), 12-tungstosilicic acid (H 4 SiW 12 O 40 ), 12-molybdophosphoric acid (H 3 PMo 12 O 40 ), and 12-molybdosilicic acid (H 4 SiMo 12 O 40 ).

9. The catalyst for producing gamma-valerolactone according to claim 1 , wherein the heteropolyacid is supported in an amount of 1 to 10 parts by weight based on 100 parts by weight of a total weight of zeolite.

10. A method for preparing the catalyst for producing gamma-valerolactone according to claim 1 , the method comprising:
impregnating Beta zeolite substituted with a metal with a heteropolyacid solution; and
calcining the impregnated catalyst.

11. The method for preparing the catalyst for producing gamma-valerolactone according to claim 10 , wherein a solvent of the heteropolyacid solution is an alcohol solvent having 1 to 6 carbon atoms.

12. The method for preparing the catalyst for producing gamma-valerolactone according to claim 10 , wherein the impregnating method is an incipient wetness impregnation in which a heteropolyacid solution in an amount corresponding to a pore volume of zeolite is gradually added to and supported on the zeolite.

13. The method for preparing the catalyst for producing gamma-valerolactone according to claim 10 , wherein a calcination temperature is 100° C. to 400° C.

14. A method for manufacturing gamma-valerolactone, the method comprising: conducting a reaction for producing gamma-valerolactone using the catalyst for producing gamma-valerolactone according to claim 1 .

15. The method for manufacturing gamma-valerolactone according to claim 14 , wherein the reaction for producing gamma-valerolactone is conducted by mixing furfural and an alcohol solvent with the catalyst.

16. The method for manufacturing gamma-valerolactone according to claim 14 , wherein the reaction for producing gamma-valerolactone is conducted at 120° C. to 180° C.

17. The method for manufacturing gamma-valerolactone according to claim 14 , wherein the reaction for producing gamma-valerolactone is conducted for 6 to 48 hours.

Assignees

• Korea Inst Sci & Tech

Inventors

• Jae Jungho
• Winoto Haryo Pandu
• Ha Jeong-Myeong
• Lee Hyun Joo
• Suh Dong Jin
• Ahn Byoung Sung

Classifications

• B01J27/188

  with chromium, molybdenum, tungsten or polonium · CPC title

• B01J2229/183

  in framework positions · CPC title

• C07D307/33

  in position 2, the oxygen atom being in its keto or unsubstituted enol form · CPC title

• B01J29/7057 Primary

  Zeolite Beta · CPC title

• B01J37/0201

  Impregnation · CPC title