Catalyst preparation
View Patent ↗A TS-1 catalyst suitable for the production of oxirane compounds is prepared by subjecting conventionally formed TS-1 to a size reduction treatment such as milling such that the average particle size weighted by volume of the TS-1 is reduced to less than 10 microns in diameter and the size reduced TS-1 is spray dried.
1. In a process for the preparation of TS-1 catalyst particles suitable for the production of oxirane compounds from TS-1 particles having a median diameter weighted by volume of 10 microns or higher, the improvement of reducing the average diameter of the TS-1 particles weighted by volume, to below 10 microns and spray drying an aqueous suspension of the size reduced TS-1 particles.
2. The process for producing an oxirane compound which comprises epoxidizing an olefin by catalytic reaction with hydrogen peroxide wherein the catalyst is produced by the process of claim 1 .
3. The process for producing an oxirane compound which comprises reacting an olefin, hydrogen and oxygen at epoxidizing conditions in the presence of a catalyst comprised of a noble metal supported on TS-1 produced by the process of claim 1 .
4. The process of claim 1 wherein the catalyst particles are also comprised of binder.
5. The process of claim 2 wherein the olefin is propylene.
6. The process of claim 3 wherein the olefin is propylene.
7. The process of claim 3 wherein the noble metal is palladium.
8. The process of claim 1 wherein the average diameter of the TS-1 particles weighted by volume is reduced to less than 5 microns.