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Process for producing dimethyl sulfoxide by using coal-to-ethylene glycol synthesis waste gas hydrogen sulfide

A technology of dimethyl sulfoxide and coal-to-ethylene glycol, which is applied in sulfide preparation, organic chemistry, sulfate preparation, etc., can solve problems such as the toxicity of salts to microorganisms

Inactive Publication Date: 2019-02-01
贵州黔希化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the production wastewater of the DMO workshop, it contains a large amount of nitrate and nitrite, and the nitrate nitrogen and nitrite nitrogen can be removed by the AO process of coal chemical wastewater treatment at the present stage, but the salt substances are inhibited or even harmful to microorganisms. poisonous effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of technology that utilizes coal-to-ethylene glycol synthesis waste gas hydrogen sulfide to produce dimethyl sulfoxide is as follows:

[0024] The hydrogen sulfide discharged from the boiler or gasification device process is purified by pickling, water washing, gas-liquid separation and other processes. After removing impurities, it enters the absorption process and is absorbed by sodium hydroxide solution. The tail gas is pumped out with a jet pump and the absorption reaches the end. After passing the inspection, it will be evaporated and concentrated at 100°C. When the concentration of sodium sulfide reaches 60-70%, it will be sent to the tablet machine, made into flakes, packaged and stored in the warehouse, and registered as the raw material for production; methanol will be vaporized after preheating The tower is vaporized into methanol vapor, and the methanol vapor is heated to 250°C and enters the reactor. The surface area of ​​the methanol vapor is 150-300m...

Embodiment 2

[0026] A kind of technology that utilizes coal-to-ethylene glycol synthesis waste gas hydrogen sulfide to produce dimethyl sulfoxide is as follows:

[0027] The hydrogen sulfide discharged from the boiler or gasification device process is purified by pickling, water washing, gas-liquid separation and other processes. After removing impurities, it enters the absorption process and is absorbed by sodium hydroxide solution. The tail gas is pumped out with a jet pump and the absorption reaches the end. After passing the inspection, it will be evaporated and concentrated at 100°C. When the concentration of sodium sulfide reaches 60-70%, it will be sent to the tablet machine, made into flakes, packaged and stored in the warehouse, and registered as the raw material for production; methanol will be vaporized after preheating The tower is vaporized into methanol vapor, and the methanol vapor is heated to 240°C and enters the reactor. The surface area of ​​the methanol vapor is 150-300m...

Embodiment 3

[0029]A kind of technology that utilizes coal-to-ethylene glycol synthesis waste gas hydrogen sulfide to produce dimethyl sulfoxide is as follows:

[0030] The hydrogen sulfide discharged from the boiler or gasification device process is purified by pickling, water washing, gas-liquid separation and other processes. After removing impurities, it enters the absorption process and is absorbed by sodium hydroxide solution. The tail gas is pumped out with a jet pump and the absorption reaches the end. After passing the inspection, it will be evaporated and concentrated at 105°C. When the concentration of sodium sulfide reaches 60-70%, it will be sent to the tablet machine, made into flakes, packaged and stored in the warehouse, and registered as the raw material for production; methanol will be vaporized after preheating The tower is vaporized into methanol vapor, and the methanol vapor is heated to 260°C and enters the reactor. The surface area of ​​the methanol vapor is 150-300m ...

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Abstract

The invention relates to the technical field of waste gas treatment, and particularly discloses a process for producing dimethyl sulfoxide by using coal-to-ethylene glycol synthesis waste gas hydrogensulfide. The process comprises: preparing sodium sulfide; carrying out a synthesis reaction on dimethyl ether and the sulfur trioxide in a H2S-to-sulfuric acid device to generate a dimethyl sulfate crude product; refining the dimethyl sulfate; preparing dimethyl sulfide; obtaining pure nitric oxide from sodium nitrite and dilute sulfuric acid; and preparing dimethyl sulfoxide. According to the present invention, dimethyl sulfoxide is known as the universal solvent, has the current market price of about 10200 yuan / ton, and has significant value increase potential compared with H2S waste gas, nitrite wastewater and the like requiring environmentally friendly treatment.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a process for producing dimethyl sulfoxide by utilizing waste gas hydrogen sulfide from coal-to-ethylene glycol synthesis. Background technique [0002] For a long time, domestic coal-to-ethylene glycol companies have been troubled not only by the stability of the process and the integrity of the equipment, but more importantly, by the environmental protection issue. The H emitted during the synthesis gas production process 2 S gas and high-salt wastewater discharge (mainly composed of sodium nitrite) in the production process of dimethyl oxalate, the treatment capacity of the above two wastes can almost determine the life and death of coal-to-ethylene glycol enterprises. [0003] In the existing industrial technology of coal-to-ethylene glycol, the syngas-to-ethylene glycol process generally uses nitric oxide, oxygen, and methanol to react to form methyl nitrite, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C317/04C07C315/02C07C305/08C07C303/24C07C319/14C07C321/14
CPCC07C315/02C07C303/24C07C319/14C07C305/08C07C321/14C07C317/04
Inventor 蒲鉴蒲霏嫣
Owner 贵州黔希化工有限责任公司
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