# US 4,378,308 A · Poison-resistant hydrodesulfurization catalyst

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- Number: US 4,378,308 A
- Document ID: US4378308A
- Status: Granted
- Kind: A
- Application number: 06/210,492
- Filed: 1980-11-26
- Granted: 1983-03-29
- Earliest claimed: 1980-11-26
- Assignees: Mobil Oil Corporation
- Inventors: Philip J. Angevine; Edward J. Rosinski
- Web page: https://patentgrep.com/patent/US4378308A

## CPC

- B01J 23/85: Chromium, molybdenum or tungsten
- B01J 33/00: Protection of catalysts, e.g. by coating
- B01J 37/024: {Multiple impregnation or coating}
- C10G 45/04: characterised by the catalyst used
- B01J 37/0215: {Coating}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C10G: CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION (cracking to hydrogen or synthesis gas C01B; cracking or pyrolysis of hydrocarbon gases to individual hydrocarbons or mixtures thereof of definite or specified constitution C07C; cracking to cokes C10B); RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES

## Abstract

Metal poisoning of hydrodesulfurization catalysts is reduced by coating the catalyst surface with a hydrated clay mineral, hydrated alumina, hydrated silica, or mixtures thereof. The catalyst and process in which it is used are particularly useful for the desulfurization of residual oils to produce low-sulfur, fuel oil products.

## Claims

### Claim 1

An improved hydrodesulfurization catalyst comprising particulate refractory porous inorganic oxide carrier material and a hydrogenation component, the improvement which comprises a diffusion limiting coating formed from a material selected from the group consisting of hydrated clays, hydrated silica, hydrated alumina and mixtures thereof on the catalyst particle exterior surfaces.

### Claim 2 (depends on 1)

The catalyst of claim 1 wherein said coating is formed from a hydrated Montmorrillonite clay.

### Claim 3 (depends on 2)

The catalyst of claim 2 wherein said clay is bentonite.

### Claim 4 (depends on 2)

The catalyst of claim 2 wherein said clay is kaoliniteis.

### Claim 5 (depends on 1)

The catalyst of claim 1 wherein said coating is formed from a hydrated alumina.

### Claim 6 (depends on 1)

The catalyst of claim 1 wherein said coating is formed from a hydrated alumina.

### Claim 7 (depends on 1)

The catalyst of claim 1 wherein said coating is from about 0.1 to 10 weight percent of the total catalyst.