IP Library › Granted Patent US 7,595,410
Granted Patent B2
US 7,595,410 · App. 11/489,086 · Granted Sep 29, 2009

Direct epoxidation process using improved catalyst composition

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Quick Facts
Patent No.
US 7,595,410
App. No.
11/489,086
Granted
Sep 29, 2009
Kind
B2
Abstract

A process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of a catalyst comprising a titanium or vanadium zeolite, palladium, and lead. The process results in significantly reduced alkane by-product formed by the hydrogenation of olefin.

Claims (19)

1. A process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of a catalyst comprising titanium or vanadium zeolite, palladium, and lead.

2. The process of claim 1 wherein the titanium or vanadium zeolite is titanium silicalite.

3. The process of claim 1 wherein the catalyst is comprised of from 0.01 to 10 weight percent palladium and from 0.001 to 2 weight percent lead.

4. The process of claim 1 wherein the olefin is a C 2 -C 6 olefin.

5. The process of claim 1 wherein the olefin is propylene.

6. The process of claim 1 wherein the reaction is performed in the presence of a solvent selected from the group consisting of alcohols, ethers, esters, ketones, water, liquid CO 2 , and mixtures thereof.

7. The process of claim 1 wherein the catalyst comprises palladium and lead supported on the titanium or vanadium zeolite.

8. The process of claim 7 wherein the catalyst comprises palladium, lead, and an additional noble metal supported on the titanium or vanadium zeolite.

9. The process of claim 8 wherein the noble metal is gold.

10. The process of claim 1 wherein the palladium and lead are supported on a carrier.

11. The process of claim 10 wherein the carrier is selected from the group consisting of carbons, titanias, zirconias, niobias, silicas, aluminas, silica-aluminas, tantalum oxides, molybdenum oxides, tungsten oxides, titania-silicas, zirconia-silicas, niobia-silicas, and mixtures thereof.

12. A process for producing propylene oxide comprising reacting propylene, hydrogen and oxygen in the presence of a titanium or vanadium zeolite and a supported catalyst comprising palladium, lead, and a carrier.

13. The process of claim 12 wherein the titanium or vanadium zeolite is a titanium silicalite.

14. The process of claim 12 wherein the supported catalyst is comprised of from 0.01 to 10 weight percent palladium and from 0.001 to 2 weight percent lead.

15. The process of claim 12 wherein the carrier is selected from the group consisting of carbons, titanias, zirconias, niobias, silicas, aluminas, silica-aluminas, tantalum oxides, molybdenum oxides, tungsten oxides, titania-silicas, zirconia-silicas, niobia-silicas, and mixtures thereof.

16. The process of claim 12 wherein the supported catalyst comprises palladium, lead, an additional noble metal, and a carrier.

17. The process of claim 16 wherein the noble metal is gold.

18. The process of claim 12 wherein the reaction is performed in the presence of a solvent selected from the group consisting of alcohols, ethers, esters, ketones, water, liquid CO 2 , and mixtures thereof.

19. The process of claim 18 wherein the reaction is performed in the presence of a buffer.