Hydrogenation and ethynylation catalysts

Patent metadata

Field	Value
Publication number	US-10744490-B2
Application number	US-201916556516-A
Country	US
Kind code	B2
Filing date	Aug 30, 2019
Priority date	Mar 31, 2015
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A process for preparing a catalyst includes impregnating a metal oxide carrier with an aqueous solution to form an impregnated carrier; drying the impregnated carrier to form a dried, impregnated carrier; and heat-treating the dried, impregnated carrier in air to form the catalyst; wherein: the aqueous solution includes a copper salt; and from about 3 wt % to about 15 wt % of a C 3 -C 6 multifunctional carboxylic acid; and the catalyst includes from about 5 wt % to about 50 wt % copper oxide.

First claim

What is claimed is:

1. A catalyst precursor composition comprising:
a metal oxide carrier impregnated with an aqueous solution, the aqueous solution consisting essentially of water, a copper salt, optionally a bismuth salt, optionally a precipitation agent and from about 1 wt % to about 15 wt % of a C 3 -C 6 multifunctional carboxylic acid.

2. The catalyst precursor composition of claim 1 , wherein the copper salt comprises copper nitrate, copper sulfate, copper acetate, copper chloride, or copper citrate.

3. The catalyst precursor composition of claim 1 , wherein the bismuth salt is present.

4. The catalyst precursor composition of claim 3 , wherein the bismuth salt comprises bismuth nitrate, bismuth sulfate, bismuth acetate, bismuth chloride, or bismuth citrate.

5. The catalyst precursor composition of claim 1 , wherein the multifunctional carboxylic acid is a C 3 -C 5 multi-carboxylic acid.

6. The catalyst precursor composition of claim 1 , wherein the aqueous solution comprises from about 2.5 wt % to about 7 wt % of the C 3 -C 6 multifunctional carboxylic acid.

7. The catalyst precursor composition of claim 1 , wherein the metal oxide carrier is a siliceous oxide comprising silica or silica and gamma-alumina.

8. The catalyst precursor composition of claim 1 , wherein upon drying of the aqueous solution to form a dried, impregnated carrier, and heat-treating of the dried, impregnated carrier, a catalyst is formed consisting of about 5 wt % to about 50 wt % copper oxide and optionally bismuth oxide.

9. The catalyst precursor composition of claim 8 , wherein the drying is carried out at a temperature from about 100° C. to about 125° C. for a period of time sufficient to remove substantially all water.

10. The catalyst precursor composition of claim 8 , wherein the heat-treating comprises calcining in air.

11. The catalyst precursor composition of claim 8 , wherein the heat-treating comprises pyrolyzing in an atmosphere substantially free of oxygen at a temperature from about 250° C. to about 750° C.

12. The catalyst precursor composition of claim 8 , wherein the heat-treating comprises calcination in an oxygen-limited atmosphere has less than 21 vol % oxygen.

13. The catalyst precursor composition of claim 7 , wherein the catalyst is a hydrogenation catalyst, a dehydrogenation catalyst, or a hydrogenolysis catalyst.

14. A catalyst for hydrogenation, dehydrogenation, hydrogenolysis, or ethynylation, the catalyst consisting essentially of from about 5 wt % to about 50 wt % copper oxide and optionally bismuth oxide, and wherein the catalyst is prepared by a process comprising:
impregnating a metal oxide carrier with an aqueous solution to form an impregnated carrier;
drying the impregnated carrier to form a dried, impregnated carrier; and
heat-treating the dried, impregnated carrier in air to form the catalyst;
wherein:
the aqueous solution consists essentially of water, a copper salt, optionally a bismuth salt, and optionally a precipitation agent; and
from about 1 wt % to about 15 wt % of a C 3 -C 6 multifunctional carboxylic acid.

15. The catalyst of claim 14 , wherein the copper salt comprises copper nitrate, copper sulfate, copper acetate, copper chloride, or copper citrate.

16. The catalyst of claim 14 , wherein the catalyst is an ethynylation catalyst and the bismuth salt is present and the catalyst contains up to about 5 wt % Bi 2 O 3 .

17. The catalyst of claim 16 , wherein the bismuth salt comprises bismuth nitrate, bismuth sulfate, bismuth acetate, bismuth chloride, or bismuth citrate.

18. The catalyst of claim 14 , wherein the multifunctional carboxylic acid is a C 3 -C 5 multi-carboxylic acid.

19. The catalyst precursor composition of claim 1 , wherein the aqueous solution consists of water, a copper salt, optionally a bismuth salt, optionally a precipitation agent and from about 1 wt % to about 15 wt % of a C 3 -C 6 multifunctional carboxylic acid.

20. The catalyst of claim 14 , wherein the aqueous solution consists of water, a copper salt, optionally a bismuth salt, optionally a precipitation agent and from about 1 wt % to about 15 wt % of a C 3 -C 6 multifunctional carboxylic acid.

Assignees

• Basf Corp

Inventors

• Deutsch Keenan Lee
• Madon Rostam J

Classifications

• B01J2235/00

  Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title

• B01J2235/30

  Scanning electron microscopy; Transmission electron microscopy · CPC title

• B01J35/51

  Spheres · CPC title

• B01J35/50

  characterised by their shape or configuration · CPC title

• C07C29/42

  with compounds containing triple carbon-to-carbon bonds, e.g. with metal-alkynes · CPC title