Inert gas purification method

A technology of inert gas and purification method, applied in the directions of inert gas compound, separation method, gas treatment, etc., can solve the problems of increasing cost, inability to effectively purify inert gas, large amount, etc., and achieve the effect of effective purification

Inactive Publication Date: 2014-04-30
NIPPON SANSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, in the argon purification method described in Patent Document 1, since the total amount of carbon monoxide and hydrogen is oxidized with oxygen in the catalyst tower, a large amount of oxygen and catalyst are required, which increases the cost.
[0008] That is, in the argon purification method described in Patent Document 1, there is a problem that the inert gas cannot be purified efficiently.

Method used

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  • Inert gas purification method
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Examples

Experimental program
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Embodiment approach ）

[0041] figure 1 It is a figure which shows the schematic structure of the inert gas purification apparatus concerning embodiment of this invention.

[0042] refer to figure 1 , The inert gas purification device 10 of the present embodiment has a buffer tank 11, a catalyst tower 13, a first gas delivery line 14, a hydrogen concentration analyzer 15, an oxygen supply line 16, a heat exchanger 18, a second gas delivery line 21, an adsorption Separation section 23 and gas discharge line 24 .

[0043] The buffer tank 11 stores raw material gas (hereinafter referred to as "raw material gas A") which is an inert gas containing carbon monoxide and hydrogen (more specifically, exhaust gas from a heating furnace (not shown) for melting ceramics and metals, etc.). ”) cans. The buffer tank 11 is connected to a first gas delivery line 14 . The source gas is not particularly limited as long as it is an inert gas containing carbon monoxide and hydrogen. For example, the source gas A is ...

Embodiment

[0071] Next, the excellent effect under the preferred conditions (temperature conditions of the catalyst) of the first step in the method of the present invention will be described. In addition, the following examples illustrate preferred examples of the present invention, and the present invention is not limited thereto.

[0072] In the evaluation, using the figure 1 The unit shown is the same as the inert gas refining unit.

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Abstract

This inert gas purification method, whereby an inert gas containing hydrogen and carbon monoxide is purified, includes: a first step in which oxygen is added to an inert gas, and hydrogen is converted into water through a reaction that uses a catalyst; and a second step, in which, after the first step, carbon monoxide and water are removed from the inert gas by an adsorbent.

Description

technical field [0001] The present invention relates to an inert gas purification method for reusing an inert gas used for preventing oxidation or nitriding. [0002] this application claims priority based on Japanese Patent Application No. 2011-188788 for which it applied to Japan on August 31, 2011, and uses the content here. Background technique [0003] In a heating furnace for heating ceramics, metal, etc., an inert gas such as nitrogen or argon is used to prevent oxidation and nitriding. At this time, since the amount of inert gas used is very large, it is desirable to reuse the inert gas by refining the used gas. [0004] Patent Document 1 discloses an argon purification method and an argon purification device for purifying inert gas argon. In this method, the oxidation of each reducing gas is carried out by carrying out a three-step catalytic reaction in which oxygen may be added in an argon gas containing reducing gases such as carbon monoxide and hydrogen. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B23/00B01D53/04B01J23/44
CPCC01B2210/005B01D2253/104B01D2256/18B01J29/043B01D2253/102C01B2210/0034C01B2210/0017B01D2257/502C01B2210/0014C01B2210/0032B01D2257/80C01B2210/0062C01B23/0094Y02C10/08B01D53/04C01B2210/0018C01B2210/0037C01B2210/0053C01B2210/0031B01J21/18C01B2210/0004B01D2253/108C01B21/0494B01J23/44Y02C20/40Y02P20/151
Inventor 足立贵义桥本幸惠
Owner NIPPON SANSO CORP
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