Catalyst for the synthesis of alkyl mercaptan and process for the production thereof
View Patent ↗The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is <2:1.
1. A catalyst composition comprising a catalytically active oxidic composition of cesium and tungsten having a molar ratio of cesium to tungsten of less than or equal to 1.6:1 wherein said catalytically active oxidic composition is supported by an oxidic inorganic support body.
2. A core-shell catalyst having a support core coated with a shell, wherein the shell comprises the catalyst composition according to claim 1 .
3. A core-shell catalyst having a support core coated with a shell, wherein the shell comprises a support material impregnated with the catalyst composition according to claim 1 .
4. The catalyst composition according to claim 1 , wherein the catalyst composition is present on a support material in a substantially uniform manner.
5. A supported catalyst composition comprising a support body and the catalyst composition of claim 1 , wherein the surface of the support body has been impregnated with the catalyst composition.
6. The catalyst composition according to claim 1 , wherein the molar ratio of cesium to tungsten ranges from less than 1.6:1 to about 0.8:1.
7. The catalyst composition according to claim 6 , wherein the ratio ranges from 1.6:1 to about 1:1.
8. A catalyst composition comprising an oxidic composition, wherein the oxidic composition corresponds to the general formula
Cs x WO y
in which
x ranges from about 0.8 to 1.6, and
y ranges from about 3.4 to less than 4.
9. The catalyst composition according to claim 8 , wherein the oxidic composition is present in an amount of about 15 to about 45 wt.%.
10. The catalyst composition according to claim 9 , wherein the oxidic composition is present in an amount of about 20 to about 36 wt.%.
11. A supported catalyst composition, comprising a support body or a support material that contains the catalyst composition of claim 8 .
12. The supported catalyst composition of claim 11 , wherein the support body or the support material is aluminum oxide (Al 2 O 3 ).
13. The supported catalyst composition of claim 11 , wherein the support body or support material has a specific surface ranging from about 180 to about 400 m 2 /g (BET) and a total pore volume ranging from about 0.3 to about 1.2 ml/g.