A method for recovering dimethyl sulfoxide from waste liquid containing explosive dimethyl sulfoxide

A technology of dimethyl sulfoxide and dimethyl sulfoxide, which is applied in the field of recycling dimethyl sulfoxide from waste liquid containing explosive dimethyl sulfoxide, which can solve the problems of not being able to discharge directly, increasing equipment energy consumption, and generating micro-odor, etc. , to achieve the effects of reducing pollution, fast and efficient recovery, and convenient operation

Active Publication Date: 2017-09-05
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dimethyl sulfoxide has certain toxicity and will produce a slight odor in the air, so it cannot be discharged directly
The above methods will increase the energy consumption of the equipment and cause waste of resources

Method used

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  • A method for recovering dimethyl sulfoxide from waste liquid containing explosive dimethyl sulfoxide
  • A method for recovering dimethyl sulfoxide from waste liquid containing explosive dimethyl sulfoxide
  • A method for recovering dimethyl sulfoxide from waste liquid containing explosive dimethyl sulfoxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 600ml of explosive dimethyl sulfoxide waste liquid (DMSO waste liquid) into a 1L distillation flask, turn on the condensed water, vacuum degree controller, and turn on the oil bath heating device. As the temperature rises, when the oil bath temperature reaches 66 ℃, when the vacuum reaches 0.084MPa, there will be reflux liquid, and the reflux temperature is 50℃. Continue to increase the heating temperature, the oil bath temperature is 90°C, and the vacuum degree is 0.088Mpa. After the liquid is extracted for a period of time, the reflux liquid is significantly reduced. Stop heating, turn off the vacuum system, and turn off the condensed water.

[0026] Add the remaining DMSO waste liquid after distillation into the rectification bottle, and carry out vacuum distillation operation. Gradually increase the heating temperature and vacuum degree. When the solution temperature reaches about 110°C and the vacuum degree reaches about 0.092Mpa, liquid reflux occurs. At this ...

Embodiment 2

[0034] Add 600ml of DMSO waste liquid into a 1L distillation bottle, turn on the condensed water and vacuum degree controller, and turn on the oil bath heating device. As the temperature rises, when the oil bath temperature reaches 66°C and the vacuum degree reaches 0.082Mpa, there will be reflux A liquid developed and the reflux temperature was 52°C. Continue to increase the heating temperature, the oil bath temperature is 88°C, and the vacuum degree is 0.088Mpa. After the liquid is produced for a period of time, the reflux liquid is significantly reduced. Stop heating, turn off the vacuum system, and turn off the condensed water.

[0035] Add the remaining DMSO waste liquid after distillation into the rectification bottle, and carry out vacuum distillation operation. Gradually increase the heating temperature and vacuum degree. When the solution temperature reaches about 110°C and the vacuum degree reaches about 0.092Mpa, liquid reflux occurs. At this time, the reflux temper...

Embodiment 3

[0037] Add 600ml of DMSO waste liquid into a 1L distillation bottle, turn on the condensed water and vacuum degree controller, and turn on the oil bath heating device. As the temperature rises, when the oil bath temperature reaches 66°C and the vacuum degree reaches 0.084Mpa, there will be reflux A liquid developed and the reflux temperature was 50 °C. Continue to increase the heating temperature, the oil bath temperature is 86°C, and the vacuum degree is 0.088Mpa. After the liquid is extracted for a period of time, the reflux liquid is significantly reduced. Stop heating, turn off the vacuum system, and turn off the condensed water.

[0038] Add the remaining DMSO waste liquid after distillation into the rectification bottle, and carry out vacuum distillation operation. Gradually increase the heating temperature and vacuum degree. When the solution temperature reaches about 112°C and the vacuum degree reaches about 0.091Mpa, liquid reflux occurs. At this time, the reflux temp...

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Abstract

The invention discloses a method for recycling dimethyl sulfoxide (DMSO) from explosive-containing dimethyl sulfoxide waste liquid. The method comprises the following steps: adding the waste liquid into a distillation flask; refluxing in condensed water, in vacuum and in an oil bath, wherein the refluxing temperature is 50 DEG C to 52 DEG C at the beginning; improving a heating temperature and refluxing under the conditions that the temperature of the oil bath is 86 DEG C to 90 DEG C and the vacuum degree is 0.088MPa; after no refluxing liquid exists, adding the waste liquid without water into a rectification bottle; refluxing by a system under the conditions of condensed water, vacuum and oil bath, wherein the refluxing temperature is 95 DEG C to 97 DEG C; after refluxing for a period of time, stopping heating when the volume of a residual solution is reduced to be 1 / 3 to 1 / 5 of the volume of a stock solution; condensing and recycling to obtain liquid, namely the dimethyl sulfoxide. By adopting a method combining decompression and distillation and decompression and rectification, the disadvantage of high energy consumption of an existing method for recycling the dimethyl sulfoxide is avoided; distilled water is discharged when reaching the standards; the purity of the rectified DMSO reaches index requirements and can be used for recrystallizing explosive octogen.

Description

technical field [0001] Embodiments of the present invention relate to the field of green environmental protection, and more specifically, embodiments of the present invention relate to a method for recovering dimethyl sulfoxide from waste liquid containing explosive dimethyl sulfoxide. Background technique [0002] With the continuous development of scientific research and production, dimethyl sulfoxide, as a commonly used organic solvent for explosive recrystallization, will further increase in demand, resulting in a large amount of waste liquid containing explosive dimethyl sulfoxide. The main components of dimethyl sulfoxide waste liquid are: dimethyl sulfoxide, water and Octogen. Dimethyl sulfoxide has certain toxicity and will produce a slight odor in the air, so it cannot be discharged directly. Because the waste liquid contains a lot of water, it is difficult to dispose of it by ordinary incineration methods. At present, the dimethyl sulfoxide waste liquid produced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C317/04C07C315/06
CPCC07C315/06C07C317/04
Inventor 王述存徐容黄明徐瑞娟赵林倪刚余堃
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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