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Method for using butane oxidation tail gas

A technology for oxidizing tail gas and carbon monoxide, which is applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of complex process, large amount of washing waste liquid, high production cost, etc., and achieve good selectivity, high separation efficiency, and easy operation The effect of low cost

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

However, due to the serious environmental pollution caused by the benzene catalytic oxidation process, coupled with the low utilization rate of benzene and the increasing price, the research and development of the process of producing maleic anhydride with cheap and less polluting raw materials has become a hot spot of concern
[0004] In the early 1960s, low-cost C 4 Research on a new process for the production of maleic anhydride from fractions (mainly containing n-butene), but the development of this technology has been delayed due to the fact that the dehydrogenation process is an endothermic reaction and there are many by-products
The process of this method is complicated and the production cost is high, in addition, a large amount of washing waste liquid will be generated, which will pollute the environment

Method used

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  • Method for using butane oxidation tail gas
  • Method for using butane oxidation tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The tail gas of the butane oxidation device listed in Table 2 is used as the raw material, and 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 and dust removal, the dust content in the treated tail gas is 0.007mg / Nm 3 , the water content is 0.6PPm, and then the temperature of the butane oxidation tail gas reaches 50°C after heat exchange by the shell and tube countercurrent heat exchanger, and enters the membrane separator under the conditions of the pressure 0.6MPa and the inlet velocity 0.6m / s, and the separation Retentate gas rich in butane and permeate gas containing acetic acid, propionic acid, maleic anhydride and moisture are produced. The retentate gas is sent to the butane oxidation device as the raw material for the synthesis of maleic anhydride; the permeate gas is adsorbed by different adsorb...

Embodiment 2

[0033] According to the method of Example 1, the gas is only pressurized to 0.8MPa 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 0.007mg / Nm 3 , the water content is 0.6PPm, the temperature of the butane oxidation tail gas reaches 60°C after heat exchange by the heat exchanger, and enters the membrane separator under the conditions of a pressure of 0.8MPa and an inlet velocity of 3m / s, and the butane-rich gas is separated Retentate gas and permeate gas containing acetic acid, propionic acid, maleic anhydride and moisture. The retentate gas is sent to the butane oxidation device as the raw material for the synthesis of maleic anhydride; the permeate gas is adsorbed by different adsorbents and the butane is further removed as the reflux gas and then returned to the membrane separator for further purification; the other part of the permeate gas is processed by aceti...

Embodiment 3

[0035] According to the method of Example 1, the gas is only pressurized to 1.0MPa 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 membrane-feeding gas with a water content of 0.5PPm, after heat exchange by the heat exchanger, the temperature of the butane oxidation tail gas reaches 60°C, enters the membrane separator under the conditions of a pressure of 0.6MPa and an inlet velocity of 5.0m / s, and separates out Retentate gas rich in butane and permeate gas containing acetic acid, propionic acid, maleic anhydride and moisture. The retentate gas is sent to the butane oxidation device as the raw material for the synthesis of maleic anhydride; the permeate gas is adsorbed by different adsorbents and the butane is further removed as the reflux gas and then returned to the membrane separator for further purification; the other part of the permeate gas is processed by acetic acid , Propionic acid, ma...

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Abstract

The invention discloses a method for using butane oxidation tail gas. The method comprises the following steps: dehydrating and dedusting butane oxidation tail gas, the micro particle concentration in processed tail gas is less than or equal to 0.01 mg / Nm<3, the water content is less than or equal to 1 PPm; the processed tail gas is introduced into a membrane reactor at the temperature of 40-100 DEG C under 0.1-1.0 MPa, the air inlet speed is 0.5m / s-5m / s, the operation pressure of a membrane reactor is 0.5-1.0 MPa, the temperature is 50-100 DEG C, the membrane reactor is filled with a cellulose acetate membrane, permeable gas containing carbon monoxide, propionic acid, acetic acid, a solvent and water vapor can be separated, and then the components are recovered by the permeable gas. The permeable gas is mixing gas of purified butagas and nitrogen, can be directly cycled to a butane oxidation apparatus for feeding. The method can effectively remove impurities such as carbon monoxide, propionic acid, acetic acid, the solvent and water in tail gas from cis butenedioic anhydride production through n-butane oxidation.

Description

technical field [0001] The invention relates to a method for utilizing butane oxidation tail gas. Background technique [0002] Maleic anhydride (maleic anhydride, MA), also known as maleic anhydride, is an extremely important organic chemical raw material, and its consumption is second only to phthalic anhydride and acetic anhydride. Maleic anhydride is widely used, mainly used in the production of unsaturated polyester resin (UPR), 1,4-butanediol (BDO), coating resin, bis-polyimide, tetrahydrofuran (THF), γ-butyrolactone , maleic acid and tetrahydroanhydride and other series of fine chemicals, as well as raw materials for textile printing and dyeing auxiliaries, lubricating oil additives, medicines, food additives, etc. Among them, the largest use of maleic anhydride is to produce UPR and BDO, accounting for about 41.7% and 17.4% of the total consumption respectively. The output of maleic anhydride in my country reached about 800kt in 2012, a five-fold increase from 2000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/22B01D53/02B01D50/00
CPCB01D53/02B01D53/229B01D2257/502B01D2257/80B01D2257/704B01D50/20
Inventor 霍稳周刘野李花伊张宝国邓玉媛
Owner CHINA PETROLEUM & CHEM CORP
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