Treatment method and apparatus of dimethyl sulfoxide production tail gas

A dimethyl sulfoxide and treatment method technology, which is applied in the field of tail gas treatment of dimethyl sulfoxide production, can solve problems such as non-compliance with environmental protection emission standards, waste of resources, uneconomical, etc., to save resources and costs, avoid waste, and improve The effect of utilization

Active Publication Date: 2015-11-25
CHENGDU DEMEI ENG TECH
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Problems solved by technology

Both treatment methods cause waste of resources and are uneconomical, especially the first treatment meth

Method used

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  • Treatment method and apparatus of dimethyl sulfoxide production tail gas

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[0029] The present invention will be further described below in conjunction with the drawings and embodiments.

[0030] The method for treating tail gas from dimethyl sulfoxide production of the present invention includes the following steps:

[0031] A. Cooling the tail gas, the methyl mercaptan, dimethyl sulfide and methanol in the tail gas condense into mixed liquid A, and most of the hydrogen sulfide remains in the gaseous state and separated from the mixed liquid A;

[0032] B. Mix the mixed solution A with water, separate the methanol that is easily soluble in water, and obtain the mixed solution B;

[0033] C. Steam stripping separates the hydrogen sulfide dissolved in the mixed liquid B to obtain the mixed liquid C;

[0034] D. Heat the mixed liquid C into a gaseous state, and use a desulfurizing agent to adsorb hydrogen sulfide in the mixed gas to perform fine desulfurization;

[0035] E. Pass the gas obtained in step D into sodium hydroxide or potassium hydroxide solution to ab...

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Abstract

The invention relates to waste gas treatment techniques and provides a treatment method of dimethyl sulfoxide production tail gas. The treatment method includes: A, cooling the tail gas, condensing methyl mercaptan, dimethyl sulfide and methyl alcohol into mixed solution A, and keeping most hydrogen sulfide gaseous; B, mixing the mixed solution A and water, and separating the methyl alcohol easily soluble in water so as to obtain mixed solution B; C, stripping hydrogen sulfide in the mixed solution B so as to obtain mixed solution C; D, heating the mixed solution C to be gaseous, absorbing the hydrogen sulfide in mixed gas through a desulfurizing agent, and performing fine desulfurization; and E, introducing gas obtained in the step D into sodium hydroxide solution, and absorbing the methyl mercaptan to obtain disulfide methyl ether gas. A treatment apparatus of the dimethyl sulfoxide production tail gas is further provided; the treatment apparatus comprises a cooler, a methyl alcohol extraction column, a striping desulfurizing column, a heater, an absorption desulfurizing reactor and an absorption column communicated in order through a pipeline. The treatment method and apparatus is capable of recovering various components in the tail gas, economic benefit is increased, and environmental pollution is decreased.

Description

technical field [0001] The invention relates to waste gas treatment technology, in particular to a treatment method and device for tail gas produced from dimethyl sulfoxide. Background technique [0002] Dimethyl sulfoxide is widely used in fluorochloroaniline, acrylic, aromatic hydrocarbon extraction, antioxidant 1010, synthetic berberine, esterification accelerator, traditional Chinese medicine extractant, capacitor, paint remover, paraffin refining, automotive antifreeze in alpine regions , Pesticide synergist, etc., is an important chemical raw material. At present, the production of dimethyl sulfoxide both at home and abroad uses hydrogen sulfide, carbon disulfide and methanol as raw materials, and synthesizes dimethyl sulfide under the action of a catalyst. Methyl sulfide is oxidized to dimethyl sulfoxide product. In the production process of dimethyl sulfoxide, a large amount of tail gas will be discharged. The composition and mass percentage of the tail gas are rou...

Claims

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Application Information

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IPC IPC(8): B01D5/00C07C319/28C07C321/04
Inventor 郭克雄郭毛晓春黄云霞马磊黄飞
Owner CHENGDU DEMEI ENG TECH
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