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Purification of noble gases using online regeneration of getter beds

A rare gas and getter technology, applied in gas treatment, inert gas compounds, specific gas purification/separation, etc., can solve problems such as hindering reuse, and achieve energy saving, continuous purification and production effects

Inactive Publication Date: 2010-04-07
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The presence of these contaminants and impurities in the noble gases, without treatment, usually prevents their reuse in the process

Method used

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  • Purification of noble gases using online regeneration of getter beds
  • Purification of noble gases using online regeneration of getter beds
  • Purification of noble gases using online regeneration of getter beds

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Embodiment Construction

[0020] To facilitate an understanding of the invention, which relates to the purification of a noble gas stream, such as argon contaminated with hydrogen, for eventual re-use, reference is made to the accompanying drawings. It should be understood that although an argon stream is the gas stream to be purified in the examples, the method can be applied to the purification of any kind of gas (eg, other inert gas such as helium) stream.

[0021] To facilitate understanding of the purification methods described herein, two classes of reducing or contaminating impurities are defined. The first class of reducing pollutants or impurities is defined as "getter combustibles". Getter combustibles are those reducing impurities which are combusted, ie converted into their oxide form, by the metal getter oxide. Hydrogen and carbon monoxide are prime examples of getter combustibles present in contaminated noble gas streams. The second class of reducing impurities is called "catalyzed comb...

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Abstract

Processes for the recovery and purification of noble gas stream contaminated with small amounts of hydrogen and / or other getter combustibles. One process involves dividing the noble gas stream gas into a first and second noble gas streams. The first noble gas stream is sent to a second metal getter containing a bed comprised of a metal getter in an oxidized state wherein the hydrogen is combusted. Oxygen is added to the second noble gas stream and the stream is passed through a catalytic unit wherein the hydrogen is combusted and then through a first metal getter bed operating in parallel with a second bed wherein the metal getter is converted to its oxide form. When breakthrough is detected in either bed, the flows of the first and second noble gas streams are rerouted to the other beds, respectively.

Description

Background technique [0001] Noble gases are often used in powder metal sprays and plasmas and in processes that require blanketing and purging with chemically inert gases. When used in these processes, they are often contaminated with trace levels of pollutants or impurities such as hydrogen, oxygen and carbon monoxide. The presence of these contaminants and impurities in the noble gases, without treatment, generally prevents their reuse in the process. [0002] Noble gases are quite expensive and therefore several systems have been developed to recover gases from various processes and remove trace amounts of pollutants and impurities from them before being recycled for reuse. Argon is the main noble gas used in inert processes, and because of the large quantities of argon used, leading to the corresponding high cost of its use, several systems have been developed to remove impurities from argon streams. [0003] Representative patents and articles related to different metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04C01B23/00
CPCC01B2210/005B01D2256/18B01D2251/102B01J23/42B01D2255/2092B01D2255/1021C01B2210/0034B01D2257/502B01D53/0462B01D53/90B01D53/864C01B2210/0053B01D53/8671B01D2255/1023C01B23/0021B01D53/047B01J23/44B01D2257/108B01D2255/20761Y10S423/05C01B23/00
Inventor A·O·韦斯特S·R·苏克德奥J·福托波洛斯
Owner AIR PROD & CHEM INC
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