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Hollow fiber ultrafilter membrane

An ultrafiltration membrane and fiber technology, applied in membrane, membrane technology, semi-permeable membrane separation, etc., can solve the problems to be improved, and achieve excellent corrosion resistance.

Inactive Publication Date: 2016-05-04
CHANGSHU LIYUAN MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Corrosion resistance, heat resistance, cold resistance, oxidation resistance, and weather resistance of existing ultrafiltration membranes, separation membranes, and hollow fiber membranes need to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A hollow fiber ultrafiltration membrane, using polyvinylidene fluoride as the raw material of the membrane, the polyvinylidene fluoride is prepared by the following steps:

[0021] 1) Put 1-2 parts by weight of hydroxypropyl methylcellulose, 2.7 parts by weight of hydrogen peroxide, and 4.1 parts by weight of inorganic alkali solution into the reaction kettle, mix well, and then put in 1.4 parts by weight of N-acyl amino acid salt, 14.3 parts by weight of dichloro Fluoroethane solvent, 1.5 parts by weight of difluorobromoacetyl fluoride solution, stirred and reacted at -3.5°C for 28 minutes;

[0022] 2) Add 3.7 parts by weight of polyoxyethylene laurate, 4.8 parts by weight of sodium pyrophosphate solution, 83 parts by weight of vinylidene fluoride monomer, and 0.9 parts by weight of 1,2,3-trimethylcyclopentane, at 19°C Stir the reaction, and terminate the reaction when the pressure drops below 0.25MPa;

[0023] 3) Filtrate, wash, and dry to obtain powdered polyvinylid...

Embodiment 2

[0025] The hollow fiber ultrafiltration membrane uses polyvinylidene fluoride as the raw material of the membrane, and the polyvinylidene fluoride is prepared by the following steps:

[0026] 1) Put 1 part by weight of hydroxypropyl methylcellulose, 2.7 parts by weight of hydrogen peroxide, and 4.1 parts by weight of inorganic alkali solution into the reaction kettle, mix well, and then put in 1.4 parts by weight of N-acyl amino acid salt, 14.3 parts by weight of dichlorofluoroethyl alkane solvent, 1.5 parts by weight of difluorobromoacetyl fluoride solution, stirred and reacted at -3.5°C for 28 minutes;

[0027] 2) Add 3.7 parts by weight of polyoxyethylene laurate, 4.8 parts by weight of sodium pyrophosphate solution, 83 parts by weight of vinylidene fluoride monomer, and 0.9 parts by weight of 1,2,3-trimethylcyclopentane, at 19°C Stir the reaction, and terminate the reaction when the pressure drops below 0.25MPa;

[0028] 3) Filtrate, wash, and dry to obtain powdered polyv...

Embodiment 3

[0030] The hollow fiber ultrafiltration membrane uses polyvinylidene fluoride as the raw material of the membrane, and the polyvinylidene fluoride is prepared by the following steps:

[0031] 1) Put 2 parts by weight of hydroxypropyl methylcellulose, 2.7 parts by weight of hydrogen peroxide, and 4.1 parts by weight of inorganic alkali solution into the reaction kettle, mix well, and then put in 1.4 parts by weight of N-acyl amino acid salt, 14.3 parts by weight of dichlorofluoroethyl alkane solvent, 1.5 parts by weight of difluorobromoacetyl fluoride solution, stirred and reacted at -3.5°C for 28 minutes;

[0032] 2) Add 3.7 parts by weight of polyoxyethylene laurate, 4.8 parts by weight of sodium pyrophosphate solution, 83 parts by weight of vinylidene fluoride monomer, and 0.9 parts by weight of 1,2,3-trimethylcyclopentane, at 19°C Stir the reaction, and terminate the reaction when the pressure drops below 0.25MPa;

[0033] 3) Filtrate, wash, and dry to obtain powdered poly...

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PUM

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Abstract

The invention discloses a hollow fiber ultrafilter membrane. Polyvinylidene fluoride is used as a raw material of the membrane, and the preparation of polyvinylidene fluoride comprises the following steps: 1) 1-2 parts by weight of hydroxypropyl methyl cellulose, 2.7 parts by weight of hydrogen peroxide and 4.1 parts by weight of an inorganic alkali solution are added into a reaction vessel and are mixed uniformly, 1.4 parts by weight of N-acylamino acid salt, 14.3 parts by weight of a dichlorofluoroethane solvent and 1.5 parts by weight of a bromodifluoroacetyl fluoride solution are added, and a reaction is carried out for 28 minutes with stirring at -3.5 DEG C; 2) 3.7 parts by weight of polyethylene glycol monolaurate, 4.8 parts by weight of a sodium pyrophosphate solution, 83 parts by weight of a vinylidene fluoride monomer, and 0.9 parts by weight of 1,2,3-trimethylcyclopentane are added, a reaction is carried out with stirring at 19 DEG C, and when the pressure reduces to 0.25MPa, the reaction is terminated; 3) filtering, washing and drying are carried out, and powdery polyvinylidene fluoride is obtained. The hollow fiber ultrafilter membrane has the advantages of corrosion resistance, heat resistance, cold resistance, oxidation resistance, and weatherability.

Description

technical field [0001] The present invention relates to hollow fiber ultrafiltration membranes. Background technique [0002] The corrosion resistance, heat resistance, cold resistance, oxidation resistance and weather resistance of existing ultrafiltration membranes, separation membranes and hollow fiber membranes need to be improved. Contents of the invention [0003] The purpose of the present invention is to provide a hollow fiber ultrafiltration membrane, which uses polyvinylidene fluoride as the raw material of the membrane, and the prepared membrane has excellent corrosion resistance, heat resistance, cold resistance, oxidation resistance and weather resistance. [0004] In order to achieve the above object, the technical solution of the present invention is to design a hollow fiber ultrafiltration membrane, using polyvinylidene fluoride as the raw material of the membrane, and the polyvinylidene fluoride is prepared by the following steps: [0005] 1) Put 1-2 part...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/34B01D69/02C08F114/22
CPCB01D69/08B01D69/02B01D71/34B01D2325/22B01D2325/30C08F114/22
Inventor 徐建林邹建良宗建青
Owner CHANGSHU LIYUAN MEMBRANE TECH
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