# US 2010/0160654 A1 · Direct epoxidation process using improved catalyst

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- Number: US 2010/0160654 A1
- Document ID: US20100160654A1
- Status: Published application
- Kind: A1
- Application number: 12/317,012
- Filed: 2008-12-18
- Published: 2010-06-24
- Earliest claimed: 2008-12-18
- Assignees: Lyondell Chemical Technology, L.P.
- Inventors: Roger A. Grey
- Web page: https://patentgrep.com/patent/US20100160654A1

## CPC

- C07D 301/04: with air or molecular oxygen
- B01J 23/628: {with lead}
- B01J 29/89: Silicates, aluminosilicates or borosilicates of titanium, zirconium or hafnium {(B01J29/005 takes precedence)}
- B01J 35/19: {Catalysts containing parts with different compositions}
- B01J 37/0201: {Impregnation}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/18: with gases containing free hydrogen
- C07D 301/06: in the liquid phase
- C07D 301/08: in the gaseous phase
- B01J 21/06: Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J 21/063: {Titanium; Oxides or hydroxides thereof}
- B01J 29/076: containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- Y02P 20/50: Improvements relating to the production of bulk chemicals
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A supported catalyst and a catalyst mixture, useful for the direct epoxidation of olefins, are disclosed. The supported catalyst comprises a noble metal, lead, and a carrier that has been treated by contacting with nitric acid. The catalyst mixture comprises a titanium or vanadium zeolite and the supported catalyst. The invention also includes a process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of the catalyst mixture. The process results in significantly reduced alkane byproduct formed by the hydrogenation of olefin.

## Claims

### Claim 1

A process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of a titanium or vanadium zeolite and a supported catalyst comprising palladium, lead and a carrier that has been treated by contacting with nitric acid.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 1)

The process of claim 1 wherein the olefin is a C2-C6 olefin.

### Claim 4 (depends on 1)

The process of claim 1 wherein the reaction is performed in the presence of a solvent selected from the group consisting of alcohols, ketones, nitriles, water, liquid CO2, and mixtures thereof.

### Claim 5

(canceled)

### Claim 6 (depends on 1)

The process of claim 1 wherein the carrier is selected from the group consisting of titania, zirconia, niobia, silica, tantalum oxide, titania-silica, zirconia-silica, niobia-silica, and mixtures thereof.

### Claim 7

A supported catalyst comprising palladium, lead, and a carrier that has been treated by contacting with nitric acid.

### Claim 8

(canceled)

### Claim 9 (depends on 7)

The supported catalyst of claim 7 wherein the carrier is selected from the group consisting of titania, zirconia, niobia, silica, tantalum oxide, titania-silica, zirconia-silica, niobia-silica, and mixtures thereof.

### Claim 10 (depends on 9)

The supported catalyst of claim 9 wherein the carrier is titania.

### Claim 11 (depends on 10)

The supported catalyst of claim 10 wherein the titania is contacted with nitric acid prior to introduction of the noble metal and the lead.

### Claim 12

A catalyst mixture comprising a titanium or vanadium zeolite and a supported catalyst comprising palladium, lead, and a carrier that has been treated by contacting with nitric acid.

### Claim 13 (depends on 12)

The catalyst mixture of claim 12 wherein the titanium zeolite is a titanium silicalite.

### Claim 14 (depends on 13)

The catalyst mixture of claim 13 wherein the titanium silicalite is TS-1 or Ti-MWW.

### Claim 15

(canceled)

### Claim 16 (depends on 12)

The catalyst mixture of claim 12 wherein the carrier is selected from the group consisting of titania, zirconia, niobia, silica, tantalum oxide, titania-silica, zirconia-silica, niobia-silica, and mixtures thereof.