Process for treating tail gases of methyl ethyl ketone unit

A methyl ethyl ketone and tail gas technology, applied in membrane, membrane technology, dispersed particle separation and other directions, can solve the problems of complex process and high production cost, and achieve the effects of good selectivity, low operating cost and low energy consumption

Active Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The above methods are ubiquitous, but the process is complicated and the production cost is high. In addition, after the adsorbent reaches a certain amount o...

Method used

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  • Process for treating tail gases of methyl ethyl ketone unit
  • Process for treating tail gases of methyl ethyl ketone unit
  • Process for treating tail gases of methyl ethyl ketone unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Using the tail gas of the methyl ethyl ketone plant listed in Table 2 as the raw material, the solid particles and water carried in the tail gas are initially removed by the gas centrifuge, and then pressurized to 0.5MPa by the gas booster and then enters the high-pressure storage tank; further dehydration by the activated carbon filter Dust removal, the fine dust content in the treated exhaust gas is 0.008mg / Nm 3 , the water content is 0.8PPm, and then the temperature of the methyl ethyl ketone tail gas reaches 50°C after heat exchange by the shell and tube countercurrent heat exchanger. Permeate gas containing n-butene and retentate gas containing alcohol, ether, methyl ethyl ketone and moisture. The permeate gas is sent to the methyl ethyl ketone plant as the raw material for the synthesis of sec-butanol; the retentate gas is adsorbed by different adsorbents to further remove the alcohol, ether, methyl ethyl ketone and moisture in it, and then returns to the membrane...

Embodiment 2

[0035] According to the method of Example 1, the gas is only pressurized to 1.0MPa and then enters the high-pressure storage tank; the activated carbon filter is further dehydrated and dust-removed, and the dust content in the treated tail gas is 0.009mg / Nm 3 , the water content is 0.8PPm, after the heat exchange by the heat exchanger, the temperature of the methyl ethyl ketone tail gas reaches 80°C, and enters the membrane separator under the conditions of a pressure of 1.0MPa and an inlet velocity of 5m / s, and the permeate rich in n-butene is separated gas and retentate gas containing alcohol, ether, methyl ethyl ketone and moisture. The permeate gas is sent to the methyl ethyl ketone plant as the raw material for the synthesis of sec-butanol; the retentate gas is adsorbed by different adsorbents to further remove the alcohol, ether, methyl ethyl ketone and moisture in it, and then returns to the membrane separator for further purification after being pressurized as the reflu...

Embodiment 3

[0037] According to the method of Example 1, the gas is only pressurized to 0.8MPa and enters the high-pressure storage tank; the fine dust content in the exhaust gas is 0.01mg / Nm through a precision filter 3 , the water content of 1.0PPm into the membrane gas, after heat exchange by the heat exchanger, the temperature of the methyl ethyl ketone tail gas reaches 65°C, and enters the membrane separator under the conditions of a pressure of 0.8MPa and an inlet velocity of 2.0m / s, and separates the rich Permeate gas of n-butene and retentate gas containing alcohol, ether, methyl ethyl ketone and moisture. The permeate gas is sent to the methyl ethyl ketone plant as the raw material for the synthesis of sec-butanol; the retentate gas is adsorbed by different adsorbents to further remove the alcohol, ether, methyl ethyl ketone and moisture in it, and then returns to the membrane separator for further purification after being pressurized as the reflux gas; the other part The retenta...

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Abstract

The invention discloses a process for treating tail gases of a methyl ethyl ketone unit. The process comprises the following steps: performing dehydration and dust extraction treatment on the tail gases of the methyl ethyl ketone unit, so that the content of micro dust in the treated tail gases is less than or equal to 0.01mg/Nm<3>, and the moisture content is less than or equal to 1PPm; enabling the treated tail gases to enter a membrane reactor under the conditions of 0.1-1.0MPa and 40-100 DEG C, wherein the gas inlet speed is 0.5-5m/s, and a membrane material filled in the membrane reactor is a hollow fiber composite organic membrane; separating osmotic gas enriched in butane and permeation residue gases enriched in alcohols, ethers and methyl ethyl ketone, enabling the osmotic gas to return to a sec-butyl alcohol section to serve as a raw material, enabling one part of the permeation residue gases to return to the membrane reactor so as to be further purified, and recovering the alcohols, ethers and methyl ethyl ketone from the other part of the permeation residue gases. The method has the advantages of high efficiency, low energy consumption and the like.

Description

technical field [0001] The invention relates to a process for treating the tail gas of a methyl ethyl ketone device. Background technique [0002] Methyl ethyl ketone is an important low-boiling point solvent, which has excellent solubility and drying properties, can form azeotropes with many solvents, and has a strong effect on many substances, such as resins, fiber derivatives, synthetic rubber, oils, and higher fatty acids. Solvent ability, good solvent for polymer compounds such as nitrocellulose, polyurethane, vinyl resin, acrylic resin, alkyd resin, phenolic resin, adhesive, ink, magnetic tape, pharmaceutical production and lubricating oil dewaxing, widely used in lubricating oil Dewaxing, coatings, adhesives, inks, tapes, medicine and electronic components and other fields. In addition, as an important organic chemical raw material and intermediate, it can produce high-molecular ketones, cyclic compounds, etc., and can also directly synthesize methyl ethyl ketone per...

Claims

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Application Information

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IPC IPC(8): B01D53/22
CPCB01D53/22B01D53/228B01D2053/224B01D2311/04B01D2311/16
Inventor 霍稳周刘野李花伊张宝国
Owner CHINA PETROLEUM & CHEM CORP
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