# US 10,501,692 B2 · Delayed coker drum and method of operating thereof

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- Number: US 10,501,692 B2
- Document ID: US10501692B2
- Status: Granted
- Kind: B2
- Application number: 15/650,587
- Filed: 2017-07-14
- Published: 2018-01-18
- Granted: 2019-12-10
- Earliest claimed: 2016-07-15
- Assignees: Indian Oil Corporation Limited
- Applicants: Indian Oil Corporation Limited
- Inventors: Terapalli Hari Venkata Devi Prasad; Ponoly Ramachandran Pradeep; Satyen Kumar Das; Jagdev Kumar Dixit; Rajesh; Gautam Thapa; Debasis Bhattacharyya; Sankara Sri Venkata Ramakumar; Biswapriya Das
- Web page: https://patentgrep.com/patent/US10501692B2

## CPC

- C10B 33/00: Discharging devices; Coke guides
- B01J 8/44: Fluidisation grids
- B01J 19/0053: {Details of the reactor}
- C10B 1/04: Vertical retorts
- C10B 55/00: Coking mineral oils, bitumen, tar, and the like or mixtures thereof with solid carbonaceous material (cracking oils C10G)
- C10B 55/02: with solid materials
- C10B 57/18: Modifying the properties of the distillation gases in the oven (outside the oven C10K)
- C10G 1/086: {Characterised by the catalyst used}
- C10G 9/005: {Coking (in order to produce liquid products mainly)}
- C10G 51/04: including only thermal and catalytic cracking steps
- C10G 70/00: Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
- C10B: DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS (cracking oils C10G; underground gasification of minerals E21B43/295)
- 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

The present subject matter describes a method and apparatus for operating a delayed coker. The method comprises contacting a vapour produced in a delayed coker-drum with a catalyst maintained in form of a bed, and maintaining a level of said catalyst-bed within pre-defined limits during catalytic-cracking of the vapour. Thereafter, the cracked-vapour is routed to a coker-fractionator column to trigger conversion into one or more hydrocarbon products.

## Claims

### Claim 1

A delayed coker-drum comprising;
a catalyst bed located within and at about an exit of the delayed coker-drum for contacting vaporized hydrocarbon products to trigger catalytic cracking;
wherein said vaporized hydrocarbon products are generated from thermal cracking of a hydrocarbon-feed stream inside the delayed coker-drum.

### Claim 2 (depends on 1)

The delayed coker-drum as claimed in claim 1, further comprising:
an overhead vapour line connected to said bed to transfer vaporized hydrocarbon products to a coker-fractionator column;
wherein said vaporized hydrocarbon products are generated inside the delayed coker-drum from thermal cracking followed by catalytic cracking reaction.

### Claim 3

A system comprising:
a delayed-coker drum producing vaporized hydrocarbon products resulting through thermal cracking of a hydrocarbon-feed stream;
a catalyst bed flow-connected to the delayed coker-drum for contacting said vaporized hydrocarbon products to trigger cracking; and
an additional catalyst bed flow connected to the delayed coker drum for receiving said vaporized hydrocarbon products;
wherein said at least two catalyst-beds receiving said vaporized hydrocarbon products from the delayed coker drum over different period of time.

### Claim 4 (depends on 3)

The system as claimed in claim 3, further comprising a coker-fractionator column for converting cracked vapour received from at least one of said catalyst-bed into one or more hydrocarbon products.

### Claim 5

A system comprising;
a delayed coker drum;
a moving catalyst bed located within and at about an exit of the delayed coker drum for contacting vapour products generated in the coker-drum and withdrawing vaporized hydrocarbon products formed therein;
a stripper vessel connected to said catalyst bed for removing the entrained hydrocarbons within a spent-catalyst; and
a regenerator connected to said stripper vessel for regenerating the received spent catalyst and further connected to the moving catalyst bed for providing the regenerated catalyst.