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Air assisted solvent extraction method and equipment

An extraction equipment and gas-assisted technology, applied in the direction of liquid solution solvent extraction, etc., can solve the problems of difficult dispersion of extraction solvent, secondary pollution of raffinate phase, loss of extraction solvent, etc., achieve high practical value, strengthen extraction and separation, and promote full mixed effect

Inactive Publication Date: 2007-05-16
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When traditional extraction methods and equipment operate under large phase conditions, such as extracting a small amount of organic matter or ionic substances in aqueous solution, the phase phase ratio is often relatively large, and it is difficult to disperse the extraction solvent. At the same time, the extraction process is limited by the phase balance. Difficult to further improve its separation efficiency
On the other hand, during the extraction process, a part of the extraction solvent often remains in the raffinate phase, which not only causes the loss of the extraction solvent, but also causes secondary pollution to the raffinate phase.
There are often contradictions between improving the extraction efficiency and capacity and reducing the loss of extraction solvent and secondary pollution to the raffinate phase, which is difficult to be resolved satisfactorily

Method used

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  • Air assisted solvent extraction method and equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 is the making of the equipment used for a kind of gas-assisted solvent extraction method:

[0021] As shown in Figure 1, the present invention provides a kind of equipment used in gas-assisted solvent extraction method, mainly comprises gas-assisted mixed reduction extraction zone 4, gas-assisted enhanced extraction zone 5, three-phase flaring separation zone 9, gas distributor 2,3 , it is characterized in that, the gas distributor 2 and 3 and the heavy phase outlet 1 are arranged in the lower part of the gas-assisted mixed-reduction extraction zone 4, and the extraction agent inlet 21 is set in the upper part; the moving parts (sieve plate or turntable) are set in the gas-assisted enhanced extraction zone 5 6) and the drive shaft 7, which are driven by the driving device 13 on the top of the equipment, and the heavy phase inlet 8 is set on the top; the three-phase flare separation area 9 is provided with an inner bubble flare channel 10, which is placed in ...

Embodiment 2

[0025] Embodiment 2, butyl acetate aqueous solution-kerosene system

[0026] With the gas-assisted solvent extraction equipment made in Example 1, the butyl acetate aqueous solution of 0.53v% enters the gas-assisted enhanced extraction zone 5 from the heavy phase inlet 8 at a flow rate of 100ml / min, and the kerosene without butyl acetate enters the gas-assisted enhanced extraction zone 5 at a flow rate of 4ml / min. The flow rate enters the gas-assisted enhanced extraction zone 5 from the solvent phase inlet 21, and the ratio is 25:1, the two-phase countercurrent operation, the vibration frequency is 4.5 Hz, and the amplitude is 0.5 cm. The nitrogen in the compressed steel cylinder passes through the inlet pipe 2 and the gas distribution The device 3 enters the gas-assisted mixed reduction extraction zone 4. When there is no gas-assisted, that is, the gas flow rate is zero, the content of butyl acetate in the aqueous phase of the tower after 50 minutes of operation is 0.15v%, and...

Embodiment 3

[0027] Embodiment 3, the waste acid water-nonane system containing butyl acetate discharged in the production of penicillin

[0028] With the gas-assisted solvent extraction equipment made in Example 1, the flow of 75ml / min of waste acid water containing butyl acetate discharged in the production of 0.38v% penicillin enters the gas-assisted enhanced extraction zone 5 from the heavy phase inlet 8, and does not contain butyl acetate Ester nonane enters the gas-assisted enhanced extraction zone 5 from the solvent phase inlet 21 at a flow rate of 2.5ml / min, the ratio of the two is 30:1, two-phase countercurrent operation, vibration frequency 4.5 Hz, amplitude 0.5cm, compression cylinder Nitrogen enters the gas-assisted mixing reduction extraction zone 4 through the inlet pipe 2 and the gas distributor 3. When there is no gas-assisted, that is, the gas flow rate is zero, the butyl acetate content in the tower waste acid water after 40 minutes of operation is 0.13v%, and the extracti...

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Abstract

The invention relates to a gas assisting solvent extractive method and relative device, wherein it completes the gas assisting solvent reduce mixed extraction, gas assisting solvent strength extraction and three-phase separation in one device; in the first step, the foams are completed extracted into organic, and process the abundant separation on the extractive solvent; in the second step, it processes gas assisting solvent strength liquid-liquid extraction; in the expandable separation area, it completes the three-phase separation, and the assisting solvent gas solvent extraction. The invention comprises gas assisting solvent reduce extraction area with gas distributor, gas assisting solvent strength extraction area with motion element, and three-phase expandable separation area with foam expandable channel. The invention can improve the separate efficiency and extraction ability, without secondary pollution of heavy phase.

Description

technical field [0001] The invention relates to a gas-assisted solvent extraction method and equipment, in particular to a gas-assisted solvent extraction method and equipment for organic or ionic substances. Background technique [0002] The liquid-liquid extraction process or solvent extraction process is an important unit operation in the chemical industry and has a wide range of applications, such as chemical industry, medicine, metallurgy, wastewater treatment and product separation and purification, etc., so the research on its operation method and equipment has been It is the research focus of researchers, and it also has important theoretical and practical significance. When traditional extraction methods and equipment operate under large phase conditions, such as extracting a small amount of organic matter or ionic substances in aqueous solution, the phase phase ratio is often relatively large, and it is difficult to disperse the extraction solvent. At the same time...

Claims

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Application Information

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IPC IPC(8): B01D11/04
Inventor 孙兴华常志东安振涛刘会洲申淑锋胡欣刘吉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI