# US 4,396,539 A · Hydrocarbon synthesis catalyst and method of preparation

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- Number: US 4,396,539 A
- Document ID: US4396539A
- Status: Granted
- Kind: A
- Application number: 06/293,043
- Filed: 1981-08-14
- Granted: 1983-08-02
- Earliest claimed: 1981-08-14
- Inventors: Richard S. Sapienza; Michael J. Sansone; William A. R. Slegeir
- Web page: https://patentgrep.com/patent/US4396539A

## CPC

- B01J 23/8953: {with zinc, cadmium or mercury}
- B01J 23/8913: {Cobalt and noble metals}
- C07C 1/0435: {containing a metal of group 8 or a compound thereof}
- C07C 2521/04: Alumina
- C07C 2521/08: Silica
- C07C 2521/16: Clays or other mineral silicates
- C07C 2523/06: of zinc, cadmium or mercury
- C07C 2523/42: Platinum
- C07C 2523/44: Palladium
- C07C 2523/75: Cobalt
- C07C 2523/89: combined with noble metals
- Y10S 502/506: Method of making inorganic composition utilizing organic compound, except formic, acetic, or oxalic acid or salt thereof
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A catalyst for the synthesis of hydrocarbons from carbon monoxide and hydrogen composed of palladium or platinum and cobalt supported on a solid phase is disclosed. The catalyst is prepared by heating a heterogeneous component of the palladium or platinum deposited on the solid support in a solution of cobalt carbonyl or precursors thereof. The catalyst exhibits excellent activity, stability in air, and produces highly desirable product fractions even with dilute gaseous reactants. The catalyst is preferably used in dilute slurry form, which is desirable from a heat transfer standpoint.

## Claims

### Claim 1

A catalyst, suitable for use in the synthesis of higher linear paraffinic hydrocarbons from carbon monoxide and hydrogen, prepared by the process consisting essentially of immersing a heterogeneous component, composed of palladium or platinum or mixtures thereof deposited on a solid phase selected from the group consisting of alumina, silica gel, kieselguhr, and zinc oxide, into a solution of cobalt carbonyl or cobalt carbonyl precursors which on heating form the cobalt carbonyl, and heating the resulting mixture at a temperature from about 100.degree. to 350.degree. C. under the pressure of gaseous carbon monoxide and hydrogen for a period of time sufficient to form the catalyst.

### Claim 2 (depends on 1)

The catalyst of claim 1, in which the cobalt is present in the range of from about 10 to 70 weight percent based on the total weight of the catalyst, and the palladium or platinum or mixtures thereof supported on the solid phase is present in the range of from about 0.1 to 10 weight percent based on the total weight of the catalyst.

### Claim 3 (depends on 1)

The catalyst of claim 1 consisting essentially of cobalt and palladium or platinum or mixtures thereof supported on a solid phase selected from the group consisting of alumina, silica gel, kieselguhr, and zinc oxide, said catalyst having the X-ray diffraction pattern shown in FIG. 1.

### Claim 4

A method for producing a catalyst suitable for use in the synthesis of higher linear paraffinic hydrocarbons from carbon monoxide and hydrogen consisting essentially of immersing a heterogeneous component, composed of palladium or platinum or mixtures thereof deposited on a solid phase selected from the group consisting of alumina, silica gel, kieselguhr, and zinc oxide, into a solution of cobalt carbonyl or cobalt carbonyl precursors which on heating form the cobalt carbonyl, and heating the resulting mixture at a temperature from about 100.degree. to 350.degree. C. under the pressure of gaseous carbon monoxide and hydrogen for a period of time sufficient to form the catalyst.

### Claim 5 (depends on 4)

The method of claim 4, wherein the heating is carried out using a partial pressure of gaseous hydrogen and carbon monoxide in the range of from about 3 to 3000 psi.

### Claim 6 (depends on 4)

The method of claim 4, wherein the temperature is about 225.degree. C.

### Claim 7 (depends on 4)

The method of claim 4, wherein the solvent is selected from the group consisting of cyclohexane, xylene decalin and tetrahydrofuran.