# US 7,745,364 B2 · Process for regenerating catalyst for a hydrocarbon conversion zone

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- Number: US 7,745,364 B2
- Document ID: US7745364B2
- Status: Granted
- Kind: B2
- Application number: 11/697,346
- Filed: 2007-04-06
- Published: 2008-07-03
- Granted: 2010-06-29
- Earliest claimed: 2006-12-29
- Assignees: Uop LLC
- Inventors: David J. Fecteau; Leon Yuan
- Web page: https://patentgrep.com/patent/US7745364B2

## CPC

- B01J 38/22: Moving bed, e.g. vertically or horizontally moving bulk
- B01J 23/96: of catalysts comprising metals, oxides or hydroxides of the noble metals
- B01J 27/32: of catalysts comprising compounds of halogens
- B01J 38/42: using halogen-containing material
- C10G 2300/70: Catalyst aspects
- 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

In one exemplary embodiment, a process for regenerating a hydrocarbon conversion catalyst for a hydrocarbon conversion zone can generally include passing the hydrocarbon conversion catalyst through, sequentially, a catalyst-disengaging zone having a first atmosphere, an adsorption zone having a second atmosphere, and a regeneration zone including a combustion zone; introducing an inert gas between the first atmosphere and the second atmosphere; and passing a flue gas from the combustion zone to the adsorption zone.

## Claims

### Claim 1

A process for regenerating a hydrocarbon conversion catalyst for a hydrocarbon conversion zone, comprising:
(a) passing the hydrocarbon conversion catalyst through, sequentially:
(i) a catalyst-disengaging zone having a first atmosphere;
(ii) an adsorption zone having a second atmosphere; and
(iii) a regeneration zone comprising a combustion zone; and
(b) introducing an inert gas between the first atmosphere and the second atmosphere; and
(c) passing a flue gas from the combustion zone to the adsorption zone.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the inert gas comprises nitrogen.

### Claim 3 (depends on 1)

The process according to claim 1, wherein the regeneration zone further comprises a regeneration vessel, which in turn comprises the combustion zone.

### Claim 4 (depends on 3)

The process according to claim 3, further comprising a conduit extending into the regeneration vessel and combustion zone for communicating the flue gas with the adsorption zone.

### Claim 5 (depends on 4)

The process according to claim 4, further comprising cooling the flue gas before entering the adsorption zone.

### Claim 6 (depends on 1)

The process according to claim 1, wherein the flue gas is withdrawn from the combustion zone and passed through a recycle gas compressor and a portion is passed to the adsorption zone.

### Claim 7 (depends on 6)

The process according to claim 6, further comprising cooling the flue gas before entering the adsorption zone.

### Claim 8 (depends on 1)

The process according to claim 1, further comprising venting a gas from the adsorption zone.

### Claim 9 (depends on 8)

The process according to claim 8, further comprising controlling the venting of the gas from the adsorption zone.

### Claim 10 (depends on 1)

The process according to claim 1, wherein introducing the inert gas creates an inert gas buffer in the catalyst-disengaging zone.

### Claim 11 (depends on 10)

The process according to claim 10, further comprising controlling the introduction of nitrogen into the inert gas buffer contained in the catalyst-disengaging zone.

### Claim 12 (depends on 1)

The process according to claim 1, further comprising recycling at least a portion of a gas comprising hydrogen from the hydrocarbon conversion zone.

### Claim 13 (depends on 1)

The process according to claim 1, wherein the adsorption zone comprises an adsorption vessel and the regeneration zone comprises a regeneration vessel, and a conduit communicates the adsorption vessel with the regeneration vessel.

### Claim 14

A process for regenerating a catalyst for a hydrocarbon conversion zone, comprising:
(a) passing the catalyst through the hydrocarbon conversion zone; and subsequently,
(b) passing the catalyst through a regeneration unit, comprising:
(i) a catalyst-disengaging zone containing an introduced buffer comprising an inert gas;
(ii) an adsorption zone communicating with the catalyst-disengaging zone via a line wherein the line receives spent catalyst from the catalyst-disengaging zone; and
(iii) a regeneration zone.

### Claim 15 (depends on 14)

A process according to claim 14, further comprising passing a flue gas from the regeneration zone to the adsorption zone.

### Claim 16 (depends on 15)

A process according to claim 15, further comprising a conduit extending into the regeneration zone for communicating the flue gas to the adsorption zone.