# US 7,745,373 B2 · Single step decomposition and activation of noble metal complexes on catalytic supports

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- Number: US 7,745,373 B2
- Document ID: US7745373B2
- Status: Granted
- Kind: B2
- Application number: 11/388,806
- Filed: 2006-03-24
- Published: 2006-10-12
- Granted: 2010-06-29
- Earliest claimed: 2005-04-08
- Assignees: ExxonMobil Research and Engineering Company
- Inventors: Stephen J. McCarthy; William G. Borghard
- Web page: https://patentgrep.com/patent/US7745373B2

## CPC

- B01J 23/40: of the platinum group metals
- B01J 37/086: {Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid}
- B01J 37/18: with gases containing free hydrogen
- B01J 23/42: Platinum
- B01J 23/44: Palladium
- B01J 29/0308: {Mesoporous materials not having base exchange properties, e.g. Si-MCM-41}
- B01J 29/041: {Mesoporous materials having base exchange properties, e.g. Si/Al-MCM-41}
- B01J 29/068: Noble metals
- B01J 37/0215: {Coating}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The present invention is a method to activate a noble metal complex dispersed on a catalyst support comprising calcining in hydrogen in order to decompose and reduce the noble metal complex in a single step. In a preferred embodiment, the noble metal catalyst is a combination of platinum and palladium and the noble metal complexes are the hydroxides.

## Claims

### Claim 1

A single-step method to decompose and activate a noble metal hydroxide complex containing a combination of platinum and palladium metals on a catalyst support containing MCM-41 comprising calcining in hydrogen in order to decompose and reduce the noble metal complexes, wherein said single-step method is substantially equivalent to a conventional two-step method.

### Claim 2 (depends on 1)

The method of claim 1 wherein said catalyst support is dried in air prior to activation.

### Claim 3 (depends on 2)

The method of claim 2 wherein said drying is performed at a temperature below 300° F.

### Claim 4 (depends on 1)

The method of claim 1 wherein said catalyst support is an amorphous support, a mesoporous support or a zeolitic support.

### Claim 5 (depends on 1)

The method of claim 1 wherein said hydrogen has a concentration between 1 to 100%.

### Claim 6 (depends on 5)

The method of claim 5 wherein said hydrogen has a concentration between 4 and 100%.