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a co 2 Method for treating emulsified oil wastewater with atmosphere-responsive materials

A material treatment and emulsified oil technology, applied in chemical instruments and methods, adsorption water/sewage treatment, separation methods, etc., to achieve high separation and recovery efficiency, easy production and promotion, and simple operation

Active Publication Date: 2021-09-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the efficient separation of emulsified oil in wastewater and the effective recovery of oil resources, there are still great challenges

Method used

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  • a co <sub>2</sub> Method for treating emulsified oil wastewater with atmosphere-responsive materials
  • a co <sub>2</sub> Method for treating emulsified oil wastewater with atmosphere-responsive materials
  • a co <sub>2</sub> Method for treating emulsified oil wastewater with atmosphere-responsive materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1)CO 2 Synthesis of Atmosphere Responsive Polymers

[0034] Add N,N-diethylaminoethyl methacrylate (12.62g) and 10mL 1,4-dioxane into a 50mL round bottom flask, and place it in a constant temperature oil bath at 75°C. Magnetic stirring was used to mix thoroughly. During this period, high-purity nitrogen gas was introduced for 30 minutes to fully remove the oxygen in the reaction system. Subsequently, the initiator azobisisobutyronitrile (12.62 mg) was added, and reacted at 75° C. for 12 h under nitrogen protection. After the reaction is over, connect the reaction system to the atmosphere to terminate the polymerization reaction. After the reaction flask was cooled to room temperature, the 1,4-dioxane solvent was removed by suspension evaporation, and then a small amount of dichloromethane was added to dissolve it, precipitated in 5 times the volume of n-hexane, and filtered. Then the dissolution-precipitation was repeated once, and the obtained solid precipitate wa...

Embodiment 2

[0042] (1)CO 2 Synthesis of Atmosphere Responsive Polymers

[0043] Add N-amidinododecylacrylamide (3.37g), 10mL 1,4-dioxane and dimethylformamide mixed solvent (volume ratio 2.5:1) into a 50mL round bottom flask, and place In a constant temperature oil bath device with a temperature of 100°C, they were fully mixed by means of magnetic stirring. During this period, high-purity nitrogen gas was introduced for 30 minutes to fully remove the oxygen in the reaction system. Subsequently, the initiator azobisisovaleronitrile (1.69 mg) was added, and reacted at 100° C. for 4 h under nitrogen protection. After the reaction is over, connect the reaction system to the atmosphere to terminate the polymerization reaction. After the reaction bottle was cooled to room temperature, the mixed solvent of 1,4-dioxane and dimethylformamide was removed by suspension evaporation, and then a small amount of dichloromethane was added to dissolve, precipitated in 5 times the volume of n-hexane, an...

Embodiment 3

[0051] (1)CO 2 Synthesis of Atmosphere Responsive Polymers

[0052] In a 50mL round bottom flask, add 14.83g 3-(1H-imidazol-4-yl) methyl acrylate, 10mL 1,4-dioxane, a mixed solvent of tetrahydrofuran and anisole (volume ratio 2:1:1 ), and placed in a constant temperature oil bath device with a temperature of 60°C, and fully mixed by means of magnetic stirring. During this period, high-purity nitrogen gas was introduced for 30 minutes to fully remove the oxygen in the reaction system. Subsequently, the initiator dimethyl azobisisobutyrate (59.32 mg) was added, and reacted at 60° C. for 36 h under the protection of nitrogen. After the reaction is over, connect the reaction system to the atmosphere to terminate the polymerization reaction. After the reaction flask was cooled to room temperature, the mixed solvent of 1,4-dioxane, tetrahydrofuran and anisole was removed by suspension evaporation, and then a small amount of dichloromethane was added to dissolve, precipitated in 5...

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Abstract

The present invention provides a CO 2 A method for treating emulsified oil wastewater with an atmosphere-responsive material, including a separation method and a recovery method for emulsified oil, the specific steps are: CO 2 The atmosphere-responsive material was added to the emulsified oil wastewater and stirred until CO 2 Atmosphere-responsive materials fully adsorb oil; in CO 2 Introducing CO into the atmosphere-responsive material 2 gas to desorb the adsorbed oil and realize oil recovery; in CO 2 Introducing N into the atmosphere-responsive material 2 , CO 2 Upon discharge, the material regains its adsorptive properties. The atmosphere responsive material of the present invention has CO 2 Response characteristics, showing high separation and recovery efficiency for different types of emulsified oils, the preparation method is simple, low in price, green and environmentally friendly, no secondary pollution, no damage to the material itself and the wastewater system, and the emulsified oil The removal rate can reach more than 99.0%, and the recovery rate can reach more than 95.0%. The material has good stability, and it still maintains a high emulsified oil adsorption and desorption efficiency under repeated use, which has important environmental benefits and economic value.

Description

technical field [0001] The present invention relates to a CO 2 The invention relates to a method for treating emulsified oil wastewater with an atmosphere responsive material, belonging to the technical field of oil-water separation. Background technique [0002] In recent years, industries such as metallurgy, oil and gas exploration, petrochemical industry, light industry leather, machinery and equipment manufacturing, food processing and catering have produced a large amount of oily wastewater. According to statistics, 5 million to 10 million tons of oily substances enter water bodies every year in the world, causing harm to the ecological environment and human health, and at the same time leading to a great waste of oil resources. Therefore, under the dual pressure of water resource pollution and oil resource depletion, efficient separation and recovery of oil in wastewater has important environmental benefits and economic value. [0003] Oil substances mainly exist in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/40C02F1/28B01D17/02B01D17/04
CPCB01D17/0202B01D17/04C02F1/28C02F1/40
Inventor 张涛刘娅
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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