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Waste gas treatment method and device in silicon oil production process

A waste gas treatment device and waste gas treatment technology are applied in the direction of gas treatment, separation methods, chemical instruments and methods, etc., which can solve problems such as stimulation of the respiratory system, toxic reactions, damage to human respiratory mucosa and vision, and meet environmental protection requirements. Pollution, reduce the effect of harm to the human body

Inactive Publication Date: 2019-07-19
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, a small amount of methanol and trimethylamine gas produced by the thermal decomposition of tetramethylammonium hydroxide is generally pumped into the ventilation system and then discharged after being diluted with air. Methanol will produce toxic reactions if ingested through the respiratory tract or skin, which will damage the human respiratory mucosa and vision. Affect the nervous system and blood system; trimethylamine has a strong fishy odor, which can stimulate the respiratory system and endanger human health

Method used

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  • Waste gas treatment method and device in silicon oil production process
  • Waste gas treatment method and device in silicon oil production process

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Experimental program
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Effect test

Embodiment 1

[0064] The waste gas from the production process of silicone oil is condensed in a methanol condenser at 5°C to obtain the waste gas after primary treatment.

[0065] The exhaust gas after the primary treatment is subjected to acid treatment in the absorption tank, and the solution of the acid treatment is a hydrochloric acid solution with a concentration of 5 wt%, to obtain purified gas. The acid-treated solution was distilled at 110° C. in a crystal evaporator and a steam heater to obtain solid trimethylamine hydrochloride.

[0066] The purified gas obtained in this embodiment was tested, and the experimental results showed that the removal rate of methanol in the purified gas obtained in this embodiment was 96%, and the removal rate of trimethylamine was 98%. The purity of the obtained solid trimethylamine hydrochloride is detected, and the experimental results show that the obtained solid trimethylamine hydrochloride has a purity of 90%.

Embodiment 2

[0068] The waste gas from the production process of silicone oil is condensed in a methanol condenser at 15°C to obtain the waste gas after primary treatment.

[0069] The exhaust gas after the primary treatment is subjected to acid treatment in the absorption tank, and the solution of the acid treatment is a hydrochloric acid solution with a concentration of 15 wt%, to obtain purified gas. The acid-treated solution was distilled at 115° C. in a crystal evaporator and a steam heater to obtain solid trimethylamine hydrochloride.

[0070] The purified gas obtained in this embodiment was tested, and the experimental results showed that the removal rate of methanol in the purified gas obtained in this embodiment was 95%, and the removal rate of trimethylamine was 99%. The purity of the obtained solid trimethylamine hydrochloride is detected, and the experimental results show that the obtained solid trimethylamine hydrochloride has a purity of 95%.

Embodiment 3

[0072] The waste gas from the production process of silicone oil is condensed in a methanol condenser at 10°C to obtain the waste gas after primary treatment.

[0073] The waste gas after the primary treatment is subjected to acid treatment in the absorption tank, and the solution of the acid treatment is the waste liquid after the hydrolysis reaction of the monomer in the production process of silicone oil with a concentration of 10 wt%, to obtain the purified gas. The acid-treated solution was distilled at 112° C. in a crystallization evaporator and a steam heater to obtain solid trimethylamine hydrochloride.

[0074] The purified gas obtained in this embodiment was tested, and the experimental results showed that the removal rate of methanol in the purified gas obtained in this embodiment was 95.5%, and the removal rate of trimethylamine was 98.4%. The purity of the obtained solid trimethylamine hydrochloride is detected, and the experimental results show that the obtained ...

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Abstract

The invention relates to the technical field of organic waste gas treatment, in particular to a waste gas treatment method and device in the silicon oil production process. The waste gas treatment method comprises the following steps: A) condensing waste gas in the silicon oil production process at a temperature of 5-25 DEG C to obtain waste gas after primary treatment; B) performing acid treatment on the waste gas after primary treatment to obtain purified gas. The waste gas treatment method in the silicon oil production process, provided by the invention, can effectively remove trimethylamine and methanol gas generated by decomposition when tetramethyl ammonium hydroxide is used as a catalyst, so that the pollution to an environment and the harm to a human body by the two gases are reduced to the most extent, and the increasingly-stringent environmental requirements are met. The purified gas obtained by the waste gas treatment method provided by the invention is detected; experimentresults show that the removal rate of methanol in the purified gas is not lower than 95 percent, and the removal rate of trimethylamine is not lower than 98 percent.

Description

technical field [0001] The invention relates to the technical field of organic waste gas treatment, in particular to a method and device for treating waste gas in the production process of silicone oil. Background technique [0002] Silicone oil is a polyorganosiloxane with chain structure of different degrees of polymerization. It has excellent viscosity-temperature properties, thermal stability, thermal-oxidative stability, electrical insulation, and shear stability. It is widely used in electrical insulation and mold release. , defoaming, damping, shockproof, rolling, dustproof, waterproof, high and low humidity and other fields. [0003] The production process of silicone oil includes monomer hydrolysis, equilibration, distillation, filtration and other operations. Among them, the equilibration reaction is the chain breaking of high molecular siloxane and the further polymerization of low molecular siloxane, which is to ensure product stability in the production process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00B01D53/78B01D53/72
CPCB01D53/002B01D53/72B01D53/78B01D2257/704B01D2257/708B01D2258/02
Inventor 李婷婷黄健龙赵小艳何清玉
Owner CHINA PETROLEUM & CHEM CORP