# US 7,612,118 B2 · Method of quenching a slurry

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- Number: US 7,612,118 B2
- Document ID: US7612118B2
- Status: Granted
- Kind: B2
- Application number: 11/501,995
- Filed: 2006-08-10
- Published: 2006-12-07
- Granted: 2009-11-03
- Earliest claimed: 2001-12-04
- Assignees: Sasol Technology (Proprietary) Limited
- Inventors: André Peter Steynberg
- Web page: https://patentgrep.com/patent/US7612118B2

## CPC

- B01J 8/22: gas being introduced into the liquid
- B01J 4/002: {Nozzle-type elements (nozzle-type reactors B01J19/26)}
- B01J 8/006: {by filtration}
- B01J 8/1818: {Feeding of the fluidising gas (B01J8/44 takes precedence)}
- B01J 8/1827: {the fluidising gas being a reactant}
- B01J 8/226: {internally, i.e. the particles rotate within the vessel}
- B01J 8/44: Fluidisation grids
- B01J 19/26: Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
- C07C 29/152: characterised by the reactor used
- C10G 1/02: by distillation
- C10G 2/342: {with moving solid catalysts}
- C10G 31/06: by heating, cooling, or pressure treatment
- B01J 2208/00132: Tubes
- B01J 2208/00141: Coils
- B01J 2208/00362: Liquid
- B01J 2208/00884: Means for supporting the bed of particles, e.g. grids, bars, perforated plates
- B01J 2219/00006: Large-scale industrial plants
- B01J 2219/00245: Avoiding undesirable reactions or side-effects
- B01J 2219/00247: Fouling of the reactor or the process equipment
- B01J 2219/00252: Formation of deposits other than coke
- B01J 2219/00268: Detecting faulty operations
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- 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

A method is provided for quenching a slurry in a slurry vessel of slurry phase apparatus which comprises a gas distributor arranged to inject a gas into the slurry at a predetermined level, and an apertured solid particles support below the level at which the gas distributor is disposed to inject the gas. The method includes introducing a quenching liquid into the slurry vessel below the apertured support and passing the quenching liquid into the slurry through the apertures of the apertured support.

## Claims

### Claim 1

A method of quenching a slurry of solid catalyst particles suspended in a liquid in a slurry vessel of slurry phase apparatus which comprises a gas distributor arranged to inject a gas into the slurry at a predetermined level, and an apertured solid particles support below the level at which the gas distributor is disposed to inject the gas, during interruption of gas flow through the gas distributor, the method including introducing a quenching liquid into the slurry vessel below the apertured support and passing the quenching liquid into the slurry through the apertures of the apertured support, thereby to quench exothermic reactions taking place in a bottom region of the slurry vessel catalysed by solid catalyst settled on the apertured solid particles support and to assist with re-suspension of catalyst particles.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein the slurry vessel is used in a process selected from the group consisting of coal liquification, methanol synthesis, higher alcohol synthesis, a hydrogenation process, and hydrocarbon synthesis from carbon monoxide and hydrogen.

### Claim 3 (depends on 1)

The method as claimed in claim 1, wherein the quenching liquid is at a temperature which is lower than the temperature of the slurry in the slurry vessel.

### Claim 4 (depends on 1)

The method as claimed in claim 1, which includes the step of introducing a quench fluid into the slurry vessel at a level above the predetermined level at which gas is injected into the slurry.

### Claim 5 (depends on 4)

The method as claimed in claim 4, wherein the quench fluid is a liquid at a temperature which is lower than the temperature of the slurry in the slurry vessel, and wherein the quench liquid is introduced through a liquid sparger.