Spray-dried transition metal zeolite and its use
View Patent ↗A catalyst comprising a spray-dried transition metal zeolite and a noble metal is disclosed. The spray-dried transition metal zeolite comprises a transition metal zeolite and a binder. At least 50 wt. % of the binder is titania. The catalyst is used in a process to produce an epoxide by reacting an olefin, hydrogen, and oxygen. The catalyst is easy to filter from a slurry and produces a reduced level of hydrogenation products.
1. A catalyst comprising a spray-dried transition metal zeolite, and a noble metal, wherein the spray-dried transition metal zeolite comprises a transition metal zeolite and an inorganic binder, at least 50 wt. % of said binder which is titania.
2. The catalyst of claim 1 wherein at least 80 wt. % of the binder is titania.
3. The catalyst of claim 1 wherein at least 95 wt. % of the binder is titania.
4. The catalyst of claim 1 wherein the transition metal zeolite is a titanium zeolite.
5. The catalyst of claim 1 wherein the transition metal zeolite is TS-1.
6. The catalyst of claim 1 wherein the noble metal is selected from the group consisting of gold, silver, platinum, palladium, iridium, ruthenium, rhenium, rhodium, osmium, and mixtures thereof.
7. The catalyst of claim 1 wherein the noble metal is selected from the group consisting of palladium, gold, and mixtures thereof.
8. The catalyst of claim 1 wherein the noble metal is palladium.
9. The catalyst of claim 1 having a mean mass diameter of 20 to 80 μm.
10. The catalyst of claim 1 further comprising a promoter selected from the group consisting of lead, bismuth, and mixtures thereof
11. An epoxidation process comprising reacting an olefin, hydrogen, and oxygen in a solvent in the presence of the catalyst of claim 1 .
12. The process of claim 11 wherein at least 80 wt. % of the binder is titania.
13. The process of claim 11 wherein at least 95 wt. % of the binder is titania.
14. The process of claim 11 wherein the transition metal zeolite is a titanium zeolite.
15. The process of claim 11 wherein the transition metal zeolite is TS-1.
16. The process of claim 11 wherein the noble metal is selected from the group consisting of gold, silver, platinum, palladium, iridium, ruthenium, rhenium, rhodium, osmium, and mixtures thereof.
17. The process of claim 11 wherein the noble metal is selected from the group consisting of palladium, gold, and mixtures thereof.
18. The process of claim 11 wherein the noble metal is selected from the group consisting of palladium, gold, and mixtures thereof.
19. The process of claim 11 wherein the noble metal is palladium.
20. The process of claim 11 wherein the catalyst comprises a promoter selected from the group consisting of lead, bismuth, and mixtures thereof.
21. A continuous process of claim 11 .