Catalyst and method for its preparation

Patent metadata

Field	Value
Publication number	US-9409161-B2
Application number	US-201214232294-A
Country	US
Kind code	B2
Filing date	Jul 10, 2012
Priority date	Jul 11, 2011
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

A catalyst including gold, or a compound thereof, and sulphur, a compound of sulphur, trichloroisocyanuric acid or a metal dichloroisocyanurate on a support, together with a process for manufacturing the catalyst and its use in a chemical process are described.

First claim

The invention claimed is:

1. A catalyst comprising a complex of gold with a sulphur-containing ligand on a support.

2. The catalyst according to claim 1 , wherein said sulphur-containing ligand is an oxidizing ligand containing sulphur in a positive oxidation state.

3. The catalyst according to claim 2 , wherein said sulphur-containing ligand is derived from a compound selected from the group consisting of a sulphonate, a thiosulphate, a thiocyanate, thiourea, thionyl chloride, thiopropionic acid and thiomalic acid.

4. The catalyst according to claim 1 , comprising from 0.005-15%, by weight, of sulphur.

5. The catalyst according to claim 1 , containing from 0.01-10% of gold, by weight based on the weight of the total catalyst.

6. The catalyst according to claim 1 , wherein said support comprises carbon.

7. The catalyst according to claim 1 , wherein said support comprises a metal oxide.

8. The catalyst according to claim 1 , wherein said support is in the form of a powder, granulate or shaped unit.

9. The catalyst according to claim 1 , wherein at least some of the gold is in a positive oxidation state.

10. The catalyst according to claim 1 , further comprising a metal or a compound of a metal selected from the group consisting of cobalt, copper, lanthanum, cerium, lithium, sodium, potassium, rubidium, caesium, magnesium, calcium, strontium and barium.

11. A method of manufacturing the catalyst according to claim 1 , comprising:
impregnating a catalyst support with a solution of gold or a compound thereof and a solution of a sulphur-containing ligand to form a gold complex, followed by
drying the impregnated support.

12. A chemical process comprising reacting at least one chemical substrate in the presence of the catalyst according to claim 1 .

13. The chemical process according to claim 12 , comprising the oxidation of said chemical substrate.

14. A process for the hydrochlorination of an alkyne comprising reacting said alkyne with HCl in the presence of the catalyst according to claim 1 .

15. The process according to claim 14 , wherein the sulphur is present in the form of elemental sulphur or a sulphur compound which is not a ligand complexed to the gold.

16. The process according to claim 14 , wherein the catalyst comprises from 0.005-10%, by weight, of sulphur.

17. The process according to claim 14 , wherein the catalyst comprises from 0.01-10% by weight of gold.

18. The process according to claim 14 , wherein the catalyst comprises a complex of gold with a sulphur-containing ligand on a support.

19. The process for the hydrochlorination of an alkyne, according to claim 14 , comprising a step of treating said catalyst with hydrogen chloride in the absence of acetylene.

20. A process for the hydrochlorination of an alkyne comprising reacting said alkyne with HCl in the presence of the catalyst according to claim 3 .

Assignees

• Bishop Peter Trenton
• Carthey Nicholas Andrew
• Johnston Peter
• Johnson Matthey Plc

Inventors

• Bishop Peter Trenton
• Carthey Nicholas Andrew
• Johnston Peter

Classifications

• B01J31/28

  of the platinum group metals, iron group metals or copper · CPC title

• B01J2531/11

  Lithium · CPC title

• B01J31/1616

  Coordination complexes, e.g. organometallic complexes, immobilised on an inorganic support, e.g. ship-in-a-bottle type catalysts (catalysts comprising molecular sieves B01J29/00) · CPC title

• B01J37/0207

  Pretreatment of the support · CPC title

• B01J37/0209

  involving a reaction between the support and a fluid · CPC title