Recycling method of ethylene oxide-containing organic waste gas

A technology for ethylene oxide and organic waste gas, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of complex treatment processes, unsafe treatment methods, and difficult treatment of process wastewater, and achieve a short process flow. , Reduce the cost of environmental protection treatment, easy to industrialize and continuous effect

Inactive Publication Date: 2015-08-05
SHANXI DATONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the technical problems of unsafe treatment methods for ethylene oxide-containing waste gas in the prior art, comp

Method used

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  • Recycling method of ethylene oxide-containing organic waste gas
  • Recycling method of ethylene oxide-containing organic waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under normal temperature and pressure, the 0.5% dilute H stored in the acid storage tank 1 2 SO 4The acid and alkali resistant pump 2 is added from the top of the hydrolysis tower 3, the organic waste gas containing ethylene oxide is passed into the tower from the bottom of the hydrolysis tower 3, and the one-way stop valve V1 is opened to make the dilute sulfuric acid solution in the acid storage An internal circulation system is formed between the tank, the acid and alkali resistant pump and the hydrolysis tower. Organic waste gas containing ethylene oxide and dilute H 2 SO 4 After sufficient contact, in this process, ethylene oxide is diluted with H 2 SO 4 Catalysis, a hydration reaction occurs to generate ethylene glycol, and most of the ethylene oxide in the organic waste gas is diluted with H 2 SO 4 The absorption is brought into the liquid phase. After the ethylene glycol aqueous solution in the absorption liquid reaches 20±1%, the one-way stop valve V1 is ...

Embodiment 2

[0036] Under normal temperature and normal pressure, the concentration of dilute sulfuric acid in the acid storage tank 1 is 0.5%. The high-performance catalyst in reactor 4 is selected from honeycomb structure Al with supported Pt and Pd 2 o 3 High-performance catalyst, the reaction temperature is 150°C.

[0037] In the above operation process, the gas volume flow rate of the organic waste gas containing ethylene oxide that passes into the hydrolysis tower 3 is different from the dilute H that passes into the hydrolysis tower 3. 2 SO 4 The ratio of liquid to volume flow of the solution is controlled at 5:1.

[0038] All the other operating conditions are the same as in Example 1.

Embodiment 3

[0040] At normal temperature and pressure, the dilute H in the acid storage tank 1 2 SO 4 The concentration is 1.0%. The high-performance catalyst in reactor 4 is selected from honeycomb structure Al with Pt loading 2 o 3 High-performance catalyst, the reaction temperature is 150°C.

[0041] In the above operation process, the gas volume flow rate of the organic waste gas containing ethylene oxide that passes into the hydrolysis tower 3 is different from the dilute H that passes into the hydrolysis tower 3. 2 SO 4 The ratio of liquid to volume flow of the solution is controlled at 5:1.

[0042] All the other operating conditions are the same as in Example 1.

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Abstract

The present invention discloses a recycling method of ethylene oxide-containing organic waste gas. The specific technical scheme comprises that: ethylene oxide in ethylene oxide-containing organic waste gas is subjected to circulation absorbing in a hydrolysis tower by using dilute sulfuric acid with a certain concentration as an absorbent so as to produce a hydration reaction to generate ethylene glycol, the ethylene glycol is conveyed into an ethylene glycol solution storage tank after the ethylene glycol in the solution achieves a certain concentration, a sodium hydroxide solution is added to neutralize, one part of the neutralized ethylene glycol solution is used for the acid gas washing process, the other part is conveyed to the product separation and recovery, the tail gas discharged from the hydrolysis tower enters a reactor to carry out deep oxidation, an acid gas washing treatment is performed, the treated standard tail gas is discharged into the atmosphere, and the absorbing liquid is recycled to the ethylene glycol solution storage tank. According to the present invention, the method has characteristics of short process and simple operation, and with the treatment of the present invention, the ethylene oxide content in the organic waste gas tail gas does not exceed 1 ppm, and a certain amount of the ethylene glycol solution is recovered so as to achieve the resource utilization of the waste gas.

Description

technical field [0001] The invention relates to the field of processing harmful gases in the petrochemical industry, and more specifically relates to a method for reusing organic waste gas containing ethylene oxide. Background technique [0002] In the field of chemical production, ethylene oxide is a chemical raw material second only to ethylene, and most of the ethylene oxide is used to manufacture other chemicals, mainly ethylene glycol, which is more widely used. In the field of daily life, ethylene oxide can be directly used as a low-temperature disinfection or sterilizing agent, such as gas sterilization of articles and materials, disinfection of medical supplies (such as bandages, sutures and surgical instruments), etc. Although the direct use consumption is small, it is widely known. [0003] The chemical properties of ethylene oxide are very active, and it can react with many compounds, and ethylene oxide is flammable, and there is a danger of burning and explosion...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/72B01D53/96
Inventor 刘建红罗化峰吕存琴晋春郭永孟双明杨国臣乔永生
Owner SHANXI DATONG UNIV
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