Epoxidation catalyst
View Patent ↗The invention is a catalyst comprising a titanium or vanadium zeolite, a binder, and zinc oxide, wherein the catalyst is preparing an aqueous mixture of the zeolite, a binder source, and a zinc oxide source, and subjecting the mixture to rapid drying. The catalyst is useful in olefin epoxidation.
1. A process for producing an epoxide comprising reacting olefin and hydrogen peroxide in the presence of a catalyst comprising a titanium or vanadium zeolite, a binder, and zinc oxide, wherein the catalyst is produced by preparing an aqueous mixture of the zeolite, a binder source, and a zinc oxide source, and subjecting the mixture to spray drying.
2. The process of claim 1 wherein the olefin is a C 2 -C 6 olefin.
3. The process of claim 1 wherein the zeolite is a titanium silicalite.
4. The process of claim 1 wherein reaction of olefin and hydrogen peroxide is performed in a solvent selected from the group consisting of water, C 1 -C 4 alcohols, CO 2 , and mixtures thereof.
5. The process of claim 1 wherein the hydrogen peroxide is formed by the in situ reaction of hydrogen and oxygen in the presence of a noble metal catalyst.
6. The process of claim 5 wherein the noble metal catalyst comprises a noble metal and a support.
7. The process of claim 6 wherein the noble metal is selected from the group consisting of palladium, platinum, gold, and mixture thereof.
8. The process of claim 6 wherein the support is selected from the group consisting of carbon, titania, zirconia, ceria, niobium oxides, silica, alumina, silica-alumina, tantalum oxides, molybdenum oxides, tungsten oxides, titania-silica, zirconia silica, ceria-silica, niobia-silica, polystyrene, styrene-divinylbenzene copolymers, crosslinked polyethyleneimines, polybenzimidazole, and mixtures thereof.
9. A process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of a catalyst comprising a noble metal and a support, wherein the support is produced by preparing an aqueous mixture of the zeolite, a binder source, and a zinc oxide source, and subjecting the mixture to spray drying.
10. The process of claim 9 wherein the olefin is propylene.
11. The process of claim 9 wherein the noble metal is selected from the group consisting of palladium, platinum, gold, and mixture thereof.
12. The process of claim 9 wherein the zeolite is titanium silicalite.
13. The process of claim 9 wherein reaction of olefin, hydrogen and oxygen is performed in a solvent selected from the group consisting of water, C 1 -C 4 alcohols, CO 2 , and mixtures thereof.