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A kind of treatment method of hydrogen peroxide oxidation tail gas

A treatment method, a technology for oxidizing tail gas, applied in gas treatment, chemical instruments and methods, separation methods, etc., can solve the problems of unqualified tail gas treatment effect, complicated treatment process, high cost, etc., and achieve enrichment and separation selectivity Good and effective recycling effect

Active Publication Date: 2021-06-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of complex treatment process, high cost and substandard tail gas treatment effect in the tail gas treatment method produced in the hydrogen peroxide production process in the prior art, the present invention intends to provide a tail gas treatment method, which uses specific means to treat membrane modules and utilizes membrane The separator separates the tail gas, fully recovers the aromatics in the tail gas, and makes the exhaust gas meet the standard

Method used

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  • A kind of treatment method of hydrogen peroxide oxidation tail gas
  • A kind of treatment method of hydrogen peroxide oxidation tail gas
  • A kind of treatment method of hydrogen peroxide oxidation tail gas

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Embodiment 1

[0038] The membrane module was treated as follows before the exhaust gas was introduced. The membrane module was soaked in isopropanol solvent at 50°C for 12 hours, and then nitrogen was introduced in three stages. The condition of nitrogen in the first stage was 0.5MPa, Temperature 80°C, flow rate 5m 3 / h; the conditions for feeding nitrogen in the second stage are pressure 0.8MPa, temperature 60°C, flow rate 3m 3 / h; the conditions for feeding nitrogen in the third stage are pressure 1.5MPa, temperature 100°C, flow rate 8m 3 / h, used for purification of hydrogen peroxide oxidation tail gas after treatment. The tail gas is condensed to 10°C, using figure 1The process flow shown is to treat 10 kinds of hydrogen peroxide oxidation tail gas with different content of aromatic hydrocarbons numbered 1~10, and the results are shown in Table 2.

Embodiment 2

[0040] According to the method of embodiment 1, just change isopropanol into ethanol, and the results are shown in Table 2.

Embodiment 3

[0042] According to the method of embodiment 1, just change isopropanol into n-butanol, and the results are shown in Table 2.

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Abstract

A method for treating tail gas oxidized by hydrogen peroxide. The tail gas is separated by a membrane separator. The membrane in the membrane separator is a silicone rubber / polymaple composite membrane with a pore diameter of 0.01um to 1.0um and an inner diameter of 0.1mm to 1.0mm. The wall thickness is 0.5mm ~ 1.5mm; before use, it is soaked in low-carbon alcohol and treated with three stages of inert gas or nitrogen. In the exhaust gas treatment method of the present invention, the specially treated membrane separator is used to change the permeability characteristics of the membrane, remove the small molecular polymer impurities in the membrane module, make the pore size distribution of the membrane module more uniform, and effectively separate and recover the exhaust gas. aromatic components; the invention also has the advantages of low equipment investment cost, long service life, simple operation and low energy consumption.

Description

technical field [0001] The invention relates to a method for treating tail gas in the production process of hydrogen peroxide, and relates to a method for separating and recovering aromatics in the tail gas. Background technique [0002] The tail gas produced by anthraquinone method for hydrogen peroxide comes from the oxidation tower. After the tail gas is condensed (10°C-20°C), the content of aromatics in the tail gas reaches 20g / m 3 -30g / m 3 . Aromatic hydrocarbons are highly volatile and easy to lose with the gas phase, and aromatic hydrocarbons are benzene substances. If they are not recovered in time, they will seriously pollute the environment. The general treatment method is to condense most of the aromatic hydrocarbons in the tail gas through a heat exchanger, then use the pressure of the oxidized tail gas as power, and cool it through an expansion unit at a low temperature to further condense and recover the heavy aromatics in the tail gas, and then absorb them t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/00B01D53/22
CPCB01D53/002B01D53/228B01D53/229B01D2257/7027B01D2258/02
Inventor 霍稳周吕清林刘野李花伊
Owner CHINA PETROLEUM & CHEM CORP