Membrane extraction device and method

An extraction device and extraction technology, which is applied in the field of membrane extraction, can solve the problem that the overall efficiency of membrane extraction is far apart, and achieve the effect of increasing the concentration difference and improving the extraction efficiency

Active Publication Date: 2015-01-07
上海展恒环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although membrane extraction has many advantages, the overall efficiency of membrane extraction is still far from that of traditional liquid-liquid extraction due to the limitation of the limited contact area between the extract and the stock solution.

Method used

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  • Membrane extraction device and method

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Experimental program
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Effect test

Embodiment 1

[0050] Embodiment 1-membrane extraction experiment

[0051] This embodiment uses the Figure 4 A similar membrane extraction device is shown, except that fifty drain sheets are used. The material of the drainage sheet is polytetrafluoroethylene, the shape is a square of 0.4m×0.4m, the thickness is 5mm, the internal flow channel is rectangular, and the rectangular cross-sectional area is 0.00004m 2 .

[0052] The filter membrane is a special extraction flat membrane produced by Shanghai Jiesheng Environmental Protection Technology Co., Ltd. The filter layer is a cellulose layer, which does not swell in organic solvents, and is a good extraction special membrane material.

[0053] The stock solution uses salt lake brine containing lithium ions, and the ion content in the salt lake brine is as shown in Table 1; 2:6 mass ratio composition.

[0054] Table 1 Table of ion content in raw liquid salt lake brine:

[0055]

[0056] The raw liquid salt lake brine has a density o...

Embodiment 1

[0064] Put the original solution and the extract into the separatory funnel, the original solution is salt lake brine, and the extract is composed of N,N-bis(1-methylheptyl)acetamide / tributyl phosphate / 200 kerosene in a mass ratio of 2:2:6 Composition, stock solution volume is 100ml, extract solution volume is 50ml. After shaking by hand for 20 minutes, let it stand still. After the two solutions are separated, the original solution of salt lake brine is in the lower layer, and the extract is in the upper layer.

Embodiment 2

[0065] Embodiment 2-membrane extraction experiment

[0066] This embodiment uses the Figure 4 The same membrane extraction device, twenty drainage pieces. The material of the drainage sheet is polyethylene, the shape is a square of 0.5m×0.5m, the thickness is 6mm, the internal flow channel is rectangular, and the rectangular cross-sectional area is 0.00007m 2 .

[0067] The filter membrane is a commercially available PP flat membrane, which does not swell in organic solvents and is a good special membrane material for extraction.

[0068] The stock solution is aqueous acetic acid solution, and the extract solution is methyl isobutyl ketone. The purpose is to extract acetic acid in aqueous solution.

[0069] The raw liquid is pumped into one liquid inlet hole, the extraction liquid is pumped into the other liquid inlet hole, and extracted between the drainage sheet flow channel and the membrane inside the device, the original liquid comes out from one liquid outlet hole,...

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Abstract

The invention relates to the technical field of membrane extraction, and in particular discloses a drainage plate, a membrane extraction assembly, a membrane extraction device and a membrane extraction method. The drainage plate comprises a patterned runner which is distributed on the drainage plate, an inlet, an outlet and a liquid through hole, wherein the patterned runner is in an open form; the inlet and the outlet are communicated with the patterned runner, and the inlet and the outlet are respectively formed in the front side and the back side of the drainage plate; the liquid through hole is not communicated with the patterned runner. When the drainage plate which is ingenious in design is assembled to form the membrane extraction device, two-phase liquids on two sides of a filter membrane simultaneously flow in parallel or along opposite directions, so that the concentration difference between the extraction liquid on each of the two sides of the filter membrane and a stock solution can be further increased on the premise of maintaining the contact area of two phases, and the extraction efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of membrane extraction, in particular to a multi-stage continuous membrane extraction device and a membrane extraction method. Background technique [0002] Membrane extraction technology is a new separation technology that combines membrane separation and extraction. It integrates sampling, extraction and concentration, and has the characteristics of high enrichment multiple, high purification efficiency, less organic solvent consumption, and low cost. Compared with the traditional liquid-liquid contact extraction process, the membrane extraction process has the following advantages: (1) There is no direct dispersion and coalescence process between the two phases, which reduces the entrainment loss of the extractant and relaxes the constraints on the density and viscosity of the extractant. Requirements for physical properties such as interfacial tension, etc., expand the selection range of extractants; (2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/04
Inventor 张秀芳方渡飞姜标徐雄立谭沈李虎敏
Owner 上海展恒环保科技有限公司
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