Method for catalyst regeneration

Patent metadata

Field	Value
Publication number	US-9611198-B2
Application number	US-201214113366-A
Country	US
Kind code	B2
Filing date	Apr 17, 2012
Priority date	Apr 18, 2011
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

The various embodiments relate to a system and method for regenerating a direct oxidation catalyst that coverts H 2 S to elemental S. One embodiment of the method comprises regenerating a direct oxidation catalyst by contacting the direct oxidation catalyst with steam.

First claim

The invention claimed is:

1. A process for treating a gas stream, the process comprising:
contacting a gas stream comprising hydrogen sulfide and at least one hydrocarbon component with an oxygen-containing gas in the presence of a direct oxidation catalyst;
monitoring the amount of sulfur dioxide generated by contacting the gas stream with the direct oxidation catalyst; and
regenerating the direct oxidation catalyst when the amount of sulfur dioxide reaches a predetermined limit by contacting the direct oxidation catalyst with steam to regenerate the direct oxidation catalyst.

2. The process of claim 1 wherein in the step of contacting the direct oxidation catalyst with steam to regenerate the direct oxidation catalyst comprises:
contacting the direct oxidation catalyst with mixture comprising steam and oxygen.

3. The process of claim 1 wherein the gas stream is contacted with the oxygen-containing gas in the presence of a direct oxidation catalyst in at least one first reactor.

4. The process of claim 3 wherein the method further comprises: diverting the gas stream to at least one second reactor comprising the direct oxidation catalyst before regenerating the direct oxidation catalyst in the first reactor; and contacting gas stream with the oxygen-containing gas and the direct oxidation catalyst in the second reactor.

5. The process of claim 3 further comprising converting carbonyl sulfide in the gas stream to hydrogen sulfide in at least one first carbonyl sulfide reactor.

6. The process of claim 5 further comprising contacting the gas stream with oxygen in the presence of the direct oxidation catalyst after the gas stream exits the carbonyl sulfide reactor.

Assignees

• Larsen Ryan
• M-I L L C

Inventors

• Larsen Ryan

Classifications

• C01B17/0465

  Catalyst compositions · CPC title

• Y02P20/584

  Recycling of catalysts · CPC title

• B01J23/96

  of catalysts comprising metals, oxides or hydroxides of the noble metals · CPC title

• B01J38/06 Primary

  using steam · CPC title

• B01J23/94

  of catalysts comprising metals, oxides or hydroxides of the iron group metals or copper · CPC title