Catalyst and method for its preparation
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.
1. A catalyst comprising gold, or a compound thereof, and trichloroisocyanuric acid or a metal dichloroisocyanurate on a support.
2. The catalyst according to claim 1 , comprising from 0.01-10% of gold, by weight based on the weight of the total catalyst.
3. The catalyst according claim 1 , wherein said support comprises carbon.
4. The catalyst according to claim 1 , wherein said support comprises a metal oxide.
5. The catalyst according to claim 1 , wherein said support is in the form of a powder, granulate or shaped unit.
6. The catalyst according to claim 1 , wherein at least some of the gold is in a positive oxidation state.
7. 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.
8. A method of manufacturing the catalyst of claim 1 , comprising the steps of:
impregnating a catalyst support with a solution of gold or a compound thereof and a solution of at least one of trichloroisocyanuric acid or a metal dichloroisocyanurate; and
drying the impregnated catalyst support.
9. A chemical process comprising reacting at least one chemical substrate in the presence of a catalyst comprising:
a) gold, or a compound thereof; and
b) trichloroisocyanuric acid or a metal dichloroisocyanurate, on a support.
10. The chemical process according to claim 9 , comprising oxidation of said chemical substrate.
11. The process according to claim 9 , wherein the chemical process is hydrochlorination of an alkyne comprising reacting said alkyne with hydrogen chloride in the presence of said catalyst.
12. The process according to claim 11 , wherein the catalyst comprises from 0.01-10% by weight of gold.
13. The process according to claim 12 , wherein the catalyst comprises from 0.01-0.6% by weight of gold.
14. The process according to claim 11 , further comprising a step of treating said catalyst with hydrogen chloride in the absence of acetylene.
15. The process according to claim 11 , wherein said support comprises carbon.
16. The process according to claim 11 , wherein said support comprises a metal oxide.
17. The process according to claim 11 , wherein said support is in the form of a powder, granulate or shaped unit.
18. The process according to claim 11 , wherein at least some of the gold is in a positive oxidation state.
19. The process according to claim 11 , wherein said catalyst further comprises 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.