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Method for recovering waste gas containing methyl tert-butyl ether

A technology for recovery of methyl tert-butyl ether and exhaust gas, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, and can solve problems such as failure to meet exhaust gas emission standards, lower MTBE recovery rate, and large amount of activated carbon. More mesopores, less MTBE decomposition, more basic sites

Active Publication Date: 2022-04-01
WANHUA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the process of using activated carbon adsorbent to adsorb and recycle waste gas containing MTBE, part of MTBE will be decomposed into isobutene by activated carbon, resulting in a decrease in the recovery rate of MTBE in the waste gas and a loss of more income; and the isobutene produced by the catalytic decomposition reaction The adsorption amount on activated carbon is small, and the emission standard of exhaust gas obtained after recycling cannot be achieved
In order to meet the emission standards, the adsorption tower loaded with activated carbon is usually made larger during the recovery process, which will inevitably lead to more activated carbon consumption and higher operating costs
[0004] For this reason, how to avoid the reduction of recovery rate caused by the decomposition reaction of methyl tert-butyl ether when recovering methyl tert-butyl ether in waste gas is a problem worthy of study

Method used

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  • Method for recovering waste gas containing methyl tert-butyl ether
  • Method for recovering waste gas containing methyl tert-butyl ether
  • Method for recovering waste gas containing methyl tert-butyl ether

Examples

Experimental program
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preparation example 1

[0072] 1, the waste TDA tar that nitrogen content is 26wt% and Wanol_C2020 polyether polyol are mixed uniformly according to the mass ratio of 1:1, then bake 20h at 300 ℃ in the blast oven; Put the carbide into the ball mill to fully grind and pulverize;

[0073] II. Mix the pulverized carbide and caustic soda (purity ≥ 99%) according to the mass ratio of 1:1 and fully grind them in a ball mill; The heating rate of min is heated to 700°C, and the mixture is obtained after being roasted at a heat preservation rate of 2 hours, and then naturally cooled to room temperature;

[0074]III. After the mixture is fully ground until there is no graininess, soak it in an aqueous hydrochloric acid solution with a concentration of 1mol / L for 4 hours, then wash the sample with a high-speed centrifuge and deionized water until the solution is neutral, and finally put it in a drying box. Dry at a temperature of 70°C for 8 hours to obtain a black powder, and then use waste TDA tar as a binder...

preparation example 2

[0076] 1, the waste TDA tar that nitrogen content is 26wt% and Wanol_C2020 polyether polyol are mixed uniformly according to the mass ratio of 1:3 first, then bake 20h at 300 ℃ in blast oven; Put the carbide into the ball mill to fully grind and pulverize;

[0077] II. Mix the pulverized carbide and caustic soda (purity ≥ 99%) according to the mass ratio of 1:1 and fully grind them in a ball mill; The heating rate of min is heated to 700°C, and the mixture is obtained after being roasted at a heat preservation rate of 2 hours, and then naturally cooled to room temperature;

[0078] III. After the mixture is fully ground until there is no graininess, soak it in an aqueous hydrochloric acid solution with a concentration of 1mol / L for 4 hours, then wash the sample with a high-speed centrifuge and deionized water until the solution is neutral, and finally put it in a drying box. Dry at a temperature of 70°C for 8 hours, then use the waste TDA tar as a binder to bind the powder, t...

preparation example 3

[0080] 1, the waste TDA tar that nitrogen content is 26wt% and Wanol_C2020 polyether polyol are mixed uniformly according to the mass ratio of 1:5 first, then bake 20h at 300 ℃ in blast oven; Put the carbide into the ball mill to fully grind and pulverize;

[0081] II. Mix the pulverized carbide and caustic soda (purity ≥ 99%) according to the mass ratio of 1:1 and fully grind them in a ball mill; The heating rate of min is heated to 700°C, and the mixture is obtained after being roasted at a heat preservation rate of 2 hours, and then naturally cooled to room temperature;

[0082] III. After the mixture is fully ground until there is no graininess, soak it in an aqueous hydrochloric acid solution with a concentration of 1mol / L for 4 hours, then wash the sample with a high-speed centrifuge and deionized water until the solution is neutral, and finally put it in a drying box. Dry at a temperature of 70°C for 8 hours, then use the waste TDA tar as a binder to bind the powder, t...

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Abstract

The invention belongs to the technical field of oil gas recovery, and particularly relates to a methyl tert-butyl ether-containing waste gas recovery method, which comprises: 1) carrying out adsorption treatment on a methyl tert-butyl ether-containing non-condensable gas to be treated through an adsorption device loaded with a nitrogen-doped porous adsorbent, with the flow rate of the non-condensable gas to be treated being 1000 m < 3 > / h as a reference, the use amount of the adsorbent being 0.5-2 m < 3 >; 2) after adsorption treatment, regenerating the nitrogen-doped porous adsorbent saturated in adsorption, and desorbing the methyl tert-butyl ether adsorbed in the nitrogen-doped porous adsorbent to obtain a methyl tert-butyl ether material flow; and the regeneration treatment adopts a process of combining vacuum desorption and thermal desorption. According to the method, the MTBE decomposition degree in the MTBE-containing waste gas resource recycling process can be reduced, the MTBE decomposition amount is reduced, and the methyl tert-butyl ether recovery rate in the recycling process is increased.

Description

technical field [0001] The invention belongs to the technical field of oil gas recovery, and in particular relates to a waste gas recovery method containing methyl tert-butyl ether. Background technique [0002] Methyl tert-butyl ether, abbreviated as MTBE (methyl tert-butyl ether), has a melting point of -109°C and a boiling point of 55.2°C. It is a colorless, transparent, high-octane liquid with an ether-like odor. The main purpose is to produce unleaded, high-octane, and oxygenated gasoline as an ideal blending component. It has been widely used as a gasoline additive all over the world. MTBE is also used as a feedstock for the production of isobutylene, as well as for the production of butyl rubber and methyl methacrylate (MMA). [0003] MTBE is a product synthesized from methanol and mixed carbon four (containing isobutylene) under the action of an acidic catalyst. This is a reversible exothermic reaction. Therefore, in the process of using activated carbon adsorbent ...

Claims

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Application Information

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IPC IPC(8): B01D53/04B01J20/02B01J20/28B01J20/30
Inventor 杜永顺段美荣赵文凯荆开石张宏科
Owner WANHUA CHEM GRP
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