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Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method

A technology for absorbing dimethyl sulfide and tail gas, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles. It can solve the problems of high odor in laboratories or production areas, restrictions on the application of borane dimethyl sulfide, and excessive discharge of tail gas and other problems, to achieve good degradation effect, promote application, and reduce cost

Inactive Publication Date: 2017-02-01
上海福乐医药科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the chemical reaction process using borane dimethyl sulfide, generally such reactions will produce hydrogen and other gases, and the boiling point of dimethyl sulfide at normal pressure is only 38 ° C, the tail gas will be discharged directly, and the tail gas will contain di Methyl sulfide, causing excessive emission of exhaust gas, making the laboratory or production area smell great
This limits the application of borane dimethyl sulfide

Method used

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  • Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method
  • Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method

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Embodiment 1

[0038] Such as figure 1 As shown, the present invention discloses a tail gas absorption device containing dimethyl sulfide, including: dimethyl sulfide tail gas pipe 1, pickling tower 2, gas-liquid separator 3, exhaust pipe 4, degradation oxidant input pipe 5 , feed pump 6, circulating pump 7, condenser 8; dimethyl sulfide tail gas pipe 1, degradation oxidant input pipe 5 and exhaust pipe 4 are connected with pickling tower 2 respectively, and between exhaust pipe 4 and pickling tower 2 A gas-liquid separator 3 is provided between them; the degradation oxidant passed into by the degradation oxidant input pipe 5 passes into the pickling tower 2 through the feed pump 6; The condenser 8 cools down and then passes into the pickling tower 2 for recycling, and the spent degradation oxidant is discharged through the waste liquid discharge pipe 9 connected with the condenser 8 .

[0039] The specific absorption method is: the tail gas containing dimethyl sulfide produced in the proce...

Embodiment 2

[0041] In the production process of catechol borane, borane dimethyl sulfide is used as reducing agent, and hydrogen gas is generated at the same time during the reaction process, and hydrogen gas is mixed with dimethyl sulfide vapor to form tail gas. The tail gas is detected before treatment, and the dynamic content of dimethyl sulfide is 0.1 kg / m 3 ~0.3kg / m 3 , exhaust flow rate 0.8m 3 / h. The above-mentioned tail gas containing dimethyl sulfide is passed into a stirred reactor, 2% to 10% calcium hypochlorite aqueous solution is used as a degradation oxidant, the vent pipe is passed below the liquid level, and the temperature is lowered through a cooling medium, containing dimethyl sulfide After the tail gas is absorbed by the degradation oxidant (the weight ratio of the degradation oxidant to the tail gas containing dimethyl sulfide is 10:1, and the reaction temperature is 25°C to 35°C), it is discharged through the exhaust pipe. The gas discharged through the exhaust pi...

Embodiment 3

[0043] In the production process of catechol borane, borane dimethyl sulfide is used as a reducing agent. During the reaction, hydrogen gas is generated at the same time. The hydrogen gas is mixed with dimethyl sulfide vapor to form tail gas. The tail gas is detected before treatment. The dynamic content of dimethyl sulfide is 0.1 kg / m 3 ~0.3kg / m 3 , exhaust flow rate 0.8m 3 / h. The tail gas containing dimethyl sulfide is passed into the storage tank, the hydrogen peroxide aqueous solution is used as a degradation oxidant, the vent pipe is passed below the liquid level, and the temperature is lowered through the cooling medium, and the tail gas containing dimethyl sulfide is absorbed by the degradation oxidant (the degradation oxidant The weight ratio to tail gas containing dimethyl sulfide is 5:1, and the reaction temperature is 15°C to 25°C), and it is discharged through the exhaust pipe. The gas discharged through the exhaust pipe has been tested to have a dimethyl sulfid...

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Abstract

The invention discloses a dimethyl sulfide-containing tail gas absorption method, wherein sulfur-containing substances are subjected to oxidation degradation with an economic oxidizing agent. The method specifically comprises: 1, adding a degradation oxidizing agent into a gas scrubber; 2, introducing borane dimethyl sulfide reaction tail gas or dimethyl sulfide tail gas into the gas scrubber of the step 1; and 3, in the gas scrubber, carrying out an oxidation degradation reaction on the borane dimethyl sulfide reaction tail gas or dimethyl sulfide tail gas and the degradation oxidizing agent to achieve the emission standard. The present invention further discloses a dimethyl sulfide-containing tail gas absorption apparatus. According to the present invention, with the method and the apparatus, the odor and toxic gas emission is controlled and the environment is protected while the raw material consumption is reduced so as to achieve the sustainable development.

Description

technical field [0001] The invention relates to a method for absorbing tail gas containing dimethyl sulfide, which specifically uses an oxidation method to degrade dimethyl sulfide and other substances in the tail gas in the use process of borane dimethyl sulfide; in addition, the invention also relates to a method containing dimethyl sulfide Absorption device for tail gas of methyl sulfide. Background technique [0002] Dimethyl sulfide is the simplest sulfide, the sulfur analogue of methyl ether. Dimethyl sulfide vapor has an unpleasant odor and is irritating to the nose and throat, causing cough and chest discomfort. Sustained or high concentration inhalation may cause headache, nausea and vomiting. Liquid or mist is irritating to eyes and can cause dermatitis. [0003] As a reducing agent, borane dimethyl sulfide complex is a convenient and stable source of borane for hydroboration reactions, selective reduction reactions of α-hydroxy esters, etc. During the chemical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/48B01D53/96
Inventor 赵辉张续李凯
Owner 上海福乐医药科技有限公司
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