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Novel middle-temperature carbonyl sulfide hydrolysis method

A carbonyl sulfide, medium temperature technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of precious metal oxides, complicated catalyst preparation, short service life, etc., and achieve high cost, long service life, good effect

Inactive Publication Date: 2011-04-06
湖北双雄催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned catalysts all have the disadvantages of complex preparation, expensive metal oxides (compared to the combined catalyst of the present invention), and high cost.
T504 type hydrolysis catalyst (produced by Hubei Institute of Chemistry), although the price is cheap, but the use temperature is low (≤150°C), if it is used at medium temperature (150°C-320°C), sulfation will occur, and its use short life

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] Laboratory example, carried out in a glass reactor, the condition is that the diameter of the reaction tube: 30mm, the total filling volume: 30mL, the anti-toxic protective agent is above the hydrolysis catalyst, the volume ratio of the anti-toxic protective agent to the hydrolysis catalyst is 1:2, two kinds Catalyst particle size: diameter of 4.0 ~ 5.0mm original particle sample, normal pressure, space velocity 2500h -1 , raw gas composition (volume percent): H 2 50%, CO 10%, CO 2 26%, O 2 0.5%, H 2 S 6000ppm, COS 40ppm, the balance is water vapor, reaction temperature: 250°C, reaction time: 240h, the raw material gas passes through the anti-toxic protective agent and hydrolysis catalyst in turn, and the COS content at the outlet is measured as the expression of its reactivity. The test results are shown in Table 1.

Embodiment 2

[0025] Laboratory example, carried out in a glass reactor, the condition is that the diameter of the reaction tube: 30mm, the total filling volume: 30mL, the anti-toxic protective agent is above the hydrolysis catalyst, the volume ratio of the anti-toxic protective agent to the hydrolysis catalyst is 1:4, two kinds Catalyst particle size: diameter of 4.0 ~ 5.0mm original particle sample, normal pressure, space velocity 2500h -1 , raw gas composition (volume percent): H 2 50%, CO 10%, CO 2 26%, O 2 0.5%, H 2S 6000ppm, COS 40ppm, the balance is water vapor, reaction temperature: 250°C, reaction time: 240h, the raw material gas passes through the anti-toxic protective agent and hydrolysis catalyst in turn, and the COS content at the outlet is measured as the expression of its reactivity. The test results are shown in Table 1.

Embodiment 3

[0027] Laboratory example, carried out in a glass reactor, the condition is that the diameter of the reaction tube: 30mm, the total filling volume: 30mL, the anti-toxic protective agent is above the hydrolysis catalyst, the volume ratio of the anti-toxic protective agent to the hydrolysis catalyst is 1:6.5, two kinds Catalyst particle size: diameter of 4.0 ~ 5.0mm original particle sample, normal pressure, space velocity 2500h -1 , raw gas composition (volume percent): H 2 50%, CO 10%, CO 2 26%, O 2 0.5%, H 2 S 6000ppm, COS 40ppm, the balance is water vapor, reaction temperature: 250°C, reaction time: 240h, the raw material gas passes through the anti-toxic protective agent and hydrolysis catalyst in turn, and the COS content at the outlet is measured as the expression of its reactivity. The test results are shown in Table 1.

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Abstract

The invention relates to a novel middle-temperature carbonyl sulfide hydrolysis method which adopts a measure of placing an antitoxic protective agent on the top of cheap active alumina hydrolysis catalysts to achieve the antitoxic and deoxidation effect and to prevent the poisoning of the hydrolysis catalysts. Trace carbonyl sulfide (COS) in various kinds of chemical raw material gases can be hydrolyzed at a temperature of 150 DEG C to 320 DEG C, the process is simple, and the price of the adopted catalysts can be reduced by more than 50 percent compared with the traditional molybdenum-containing middle-temperature surfer resistance hydrolysis catalysts (EH-2 and EH-3 types produced by Hubei Chemical Research Institute).

Description

technical field [0001] The invention relates to a medium-temperature (150°C-320°C) hydrolysis method for carbonyl sulfide in chemical raw material gases (such as shift gas, synthesis gas, water gas, propylene, and liquefied gas). Background technique [0002] The present invention relates to a novel medium-temperature carbonyl sulfide hydrolysis method. Carbonyl sulfide (COS) is the main chemical raw material gas (such as shift gas, synthesis gas, water gas, propylene, and liquefied gas) produced from oil, coal, and coke. Organic sulfur components, and contain a small amount of water vapor (gas dew point> 30 ℃), and most downstream sections are particularly sensitive to sulfur, trace sulfur in raw materials can cause downstream catalyst poisoning and deactivation. In industry, activated alumina (or modified alumina, etc., loaded with various metal compounds to improve activity) catalysts with hydrolysis function is used to promote the hydrolysis reaction of carbonyl sulfi...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/48
Inventor 陈劲松胡中光周志斌肖辉亚熊俊杰
Owner 湖北双雄催化剂有限公司
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