# US 4,400,262 A · Fluid coking with the addition of polymetaphosphoric acid catalysts

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- Number: US 4,400,262 A
- Document ID: US4400262A
- Status: Granted
- Kind: A
- Application number: 06/380,096
- Filed: 1982-05-20
- Granted: 1983-08-23
- Earliest claimed: 1982-05-20
- Assignees: Exxon Research & Engineering Co.
- Inventors: Roby Bearden, Jr.; Robert C. Schucker
- Web page: https://patentgrep.com/patent/US4400262A

## CPC

- C10G 9/005: {Coking (in order to produce liquid products mainly)}
- C10B 55/10: according to the "fluidised bed" technique
- C10G 1/02: by distillation
- C10G 11/02: characterised by the catalyst used
- C10G 11/18: according to the "fluidised-bed" technique
- Y10S 208/951: Solid feed treatment with a gas other than air, hydrogen or steam
- 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
- C10B: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A fluid coking process is provided in which a polymetaphosphoric acid, a salt of a polymetaphosphoric acid or precursors thereof are present in the fluid coking zone.

## Claims

### Claim 1

In a fluid coking process comprising the steps of: contacting a carbonaceous chargestock with hot fluidized solids in a fluidized bed contained in a coking zone maintained in a fluidized state by the introduction of a fluidizing gas and operated at coking conditions, to produce a vapor phase product and a solid carbonaceous material which deposits on said fluidized solids, the improvement which comprises the presence, in said coking zone, of an effective amount of a phosphorus-containing component selected from the group consisting of polymetaphosphoric acids, salts of polymetaphosphoric acids, precursors of said acids and of said salts, and mixtures thereof.

### Claim 2 (depends on 1)

The process of claim 1 wherein said salts of polymetaphosphoric acids are selected from the group consisting of ammonium salts of polymetaphosphoric acids, partial salts of polymetaphosphoric acids of a metal selected from the group consisting of Groups I, II, IIIA, IVB, VB, VIB, VIIB, and VIII of the Periodic Table of Elements and mixtures thereof.

### Claim 3 (depends on 1)

The process of claim 1 wherein said phosphorus-containing component is a polymetaphosphoric acid.

### Claim 4 (depends on 1)

The process of claim 1 wherein said phosphorus-containing component is present in said coking zone in an amount of at least about 0.1 weight percent, calculated as elemental phosphorus, based on the weight of said carbonaceous chargestock.

### Claim 5 (depends on 1)

The process of claim 1 wherein said phosphorus-containing component is present in said coking zone in an amount ranging from about 0.1 weight percent to about 40 weight percent.

### Claim 6 (depends on 1)

The process of claim 1 wherein said phosphorus-containing component is added to said carbonaceous chargestock.

### Claim 7 (depends on 1)

The process of claim 1 wherein said coking conditions include a temperature ranging from about 850.degree. to about 1400.degree. F.

### Claim 8 (depends on 1)

The process of claim 1 wherein said coking conditions include a temperature ranging from about 900.degree. to about 1200.degree. F.

### Claim 9 (depends on 1)

The process of claim 1 wherein said coking conditions include a pressure ranging from about 0 to about 150 psig.

### Claim 10 (depends on 1)

The process of claim 1 wherein said carbonaceous chargestock comprises a heavy hydrocarbonaceous oil.

### Claim 11 (depends on 1)

The process of claim 1 wherein said carbonaceous chargestock comprises coal.