High pressure reduction-oxidation desulfurization process

A process and oxidizer technology, applied in the direction of absorption purification/separation, chemical instruments and methods, separation methods, etc., can solve problems such as foaming, poor quality, lower overall process economy and process operability

Active Publication Date: 2013-05-01
MERICHEM CO
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Problems solved by technology

Reducing the pressure of the redox solution has undesirable consequences such as foaming, gas product loss and rapid corrosion of th

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  • High pressure reduction-oxidation desulfurization process

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[0031] As mentioned above, the present invention relates to a novel high-pressure oxidizer that can be used to regenerate a liquid redox catalyst solution. This oxidizer can be used to provide a new process scheme for desulfurization of acid gas. The operating temperature of the oxidizer can range from about 25°C to about 55°C. The operating pressure is preferably higher than 100 psig and more preferably more than 5 psi higher than the operating pressure of the absorber in fluid communication with the oxidizer.

[0032] Now turn to the schematic illustration for handling the H 2 Diagram of this desulfurization process 10 of an S-contaminated gas stream. As shown, the exhaust gas stream (sour gas) is delivered via the feed line 1 to the absorber 2, where it is brought into contact with the chelated iron catalyst aqueous solution. Absorber 2 operates at a pressure higher than 100 psig. The catalyst solution is obtained from the high pressure oxidizer 3 via the fluid control valv...

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Abstract

An improved process for reduction-oxidation desulphurization uses an oxidizer operating at a pressure greater than the absorber where a liquid reduction-oxidation catalyst solution contacts a sulfur-containing gas feed stream.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Application Serial No. 12 / 913,448, filed October 27, 2010, the entire contents of which are incorporated herein by reference. technical field [0003] The present invention relates to an improved Redox process for treating acid gas streams containing hydrogen sulfide. In particular, high pressure oxidizers are used in combination with high pressure absorbers. Background technique [0004] Hydrogen sulfide is a major source of gas stream pollution as it is used in many chemical processes (e.g. kraft or kraft pulp manufacture, slime manufacture, sewage treatment, production of organosulfur compounds) as well as during petroleum refining and in the production of natural gas from coal and It is released as a waste by-product in combustible gases, for example in coking operations. Hydrogen sulfide is also present in geothermal steam, which is captured for use in power plants. ...

Claims

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Application Information

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IPC IPC(8): B01D53/52B01D53/78B01D53/96
CPCB01D2251/902B01D2258/02B01D2256/245B01D2251/102B01D53/1468B01D53/8612B01D53/78B01D2251/90C07C7/11B01D53/96B01D2251/904B01D2251/30B01D2255/20738B01D2258/0283B01D53/52
Inventor 加里·J·纳格尔
Owner MERICHEM CO
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