Preparation method of anion exchange alloy membrane

A manufacturing method and cation exchange technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as difficult swelling behavior, rough membrane surface, and reduced anti-pollution ability

Active Publication Date: 2018-05-29
QUZHOU LANRAN NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the reinforcement effect of the mesh is not enough, and it is difficult to really limit the swelling behavior of the membrane in the environment of strong acid or strong alkali solution; anti-pollution ability
The result is: this type of semi-homogeneous membrane is the same as the heterogeneous membrane, it is still difficult to use for a long time under strong acid and strong alkaline environment, especially it cannot be used in strong acid (such as hydrochloric acid) and strong alkali for a long time after being installed in the electrodialysis unit (such as sodium hydroxide) removal or concentration

Method used

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Examples

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Embodiment 1

[0022]Preparation of raw materials: 1) thermoplastic strong base resin powder (polyethylene-quaternized polystyrene strong base anion exchange resin powder): it can be prepared by referring to the method described in the literature (Chinese invention patent application number 201510569663.X) Obtained, provided by Hangzhou Er Environmental Protection Technology Co., Ltd. (the particle size is below 50 mesh, and the anion exchange capacity is 2.53mmol / g dry basis). 2) Non-thermoplastic weak base resin powder: epoxy series weak base anion exchange resin (particle size range 0.325-1.25mm, anion exchange capacity 7.5mmol / g dry basis, model 335, manufactured by Shanghai Huazhen Customized by Technology Co., Ltd.), soaked in 4% hydrochloric acid, washed with water until neutral, that is, converted to chlorine form, and dried to constant weight at 60-70°C; first crushed with a jet mill until it can pass through a 100-mesh stainless steel screen, Grinding with a ball mill for 6 hours; ...

Embodiment 2

[0026] The model in embodiment 1 is the epoxy series weak base resin of 335, changes the model into the styrene series weak base resin of 301 (the particle diameter scope is 0.325~1.25mm, and anion exchange capacity is 5.2mmol / g, by Shanghai Customized by Huazhen Science and Technology Co., Ltd.); "3 kilograms of non-thermoplastic weak base resin powder, 3 kilograms of polyethylene powder, and 1.5 kilograms of polyisobutylene powder" in Example 1 are replaced with "3.6 kilograms of non-thermoplastic (301 ) Weak base resin powder, 4.5 kilograms of polyethylene powder, 1.8 kilograms of polyisobutylene powder "; The polyester mesh cloth that the model is DPP12S is changed into the polyester mesh cloth that the model is DPP20S (purchased from Shanghai Xintie Chain Screen Mesh Manufacturing Co., Ltd.) The rest of the raw materials and alloy film manufacturing process are unchanged compared with Example 1 (see Table 1 for details), and the prefabricated diaphragm with a thickness of ...

Embodiment 3

[0029] With the model in embodiment 1 being 335 epoxy series weak base resins, change the model into 122 phenolic series weak acid resins (the particle size range is 0.325~1.25mm, and the cation exchange capacity is 4.2mmol / g, by Tianxing, Bengbu City Resin Co., Ltd. customizes); "3 kilograms of non-thermoplastic weak base resin powder, 3 kilograms of polyethylene powder, 1.5 kilograms of polyisobutylene powder" in embodiment 1 are replaced with "1.5 kilograms of non-thermoplastic (122) weak acid Resin powder, 4.5 kilograms of polyethylene powder (do not add polyisobutylene powder) "; Change the polyester mesh cloth that model is DPP12S into the nylon mesh cloth that model is JPP24 (purchased from Shanghai Xintie Chain Screen Mesh Manufacturing Co., Ltd.); the rest The raw materials and alloy film manufacturing process are unchanged compared with Example 1 (see Table 1 for details). A prefabricated diaphragm with a thickness of 0.20 mm is prepared earlier, and an alloy film pro...

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Abstract

The invention describes a preparation method of an anion exchange alloy membrane. The method includes steps of mixing thermoplastic polyethylene-quaternary ammoniated polystyrene strong basicity anionexchange resin powder, non-thermoplastic micron order weak alkali anion exchange resin powder (or non-thermoplastic micron order weak acid anion exchange resin powder), polyethylene powder and polyisobutene powder; performing banbury compounding, opening mill and presenting pieces, continuous rolling, cooling, and cutting to obtain a single prefabricated membrane piece; finally, clamping one enhanced mesh cloth by two prefabricated membrane pieces; thermally pressing to obtain the anion exchange alloy membrane product. The membrane surface is smooth, the anti-pollution ability is strong, themembrane resistance is low, and the internal structure is compact; swelling degree in acid / alkali solution is low; the preparation method is suitable for the electrodialysis application occasion of strong acid or strong alkali solution environment.

Description

technical field [0001] The invention belongs to the technical field of functional polymer film processing, and particularly relates to a kind of reinforced mesh inlaid in the middle, the main film material is a "starry sky" polymer alloy structure, so it can meet the requirements of long-term electricity in the environment of strong acid and strong alkali solution. A method for manufacturing an anion exchange membrane used in a dialysis unit. Background technique [0002] Ion exchange membranes are widely used in the desalination of brackish water based on electrodialysis technology, salt production from seawater concentration, special separation and desalination of food, desalination of industrial wastewater, acid / alkali recovery, etc. In the past, heterogeneous membranes were formed by mixing non-thermoplastic (strongly acidic or strongly alkaline) ion exchange resin powder and binders such as polyethylene and then pressing the surface with reinforcing mesh cloth, because ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/28B01D71/26B01D67/00
CPCB01D67/0002B01D71/26B01D71/28
Inventor 雷引林李南文杨燕航殷锦卿波
Owner QUZHOU LANRAN NEW MATERIAL CO LTD
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