A RO reverse osmosis functional membrane with high flux and strong antifouling

A reverse osmosis, high-flux technology, applied in reverse osmosis, semi-permeable membrane separation, membrane and other directions, can solve the problems of water flux decline of osmotic membrane, difficult control of reaction activity, damage of reverse osmosis membrane, etc., to achieve water flux Recovery, excellent membrane separation performance, high water flux effect

Active Publication Date: 2019-07-02
安徽智泓净化科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing grafting modification method generally adopts macromolecular polymer grafting, the reactivity is difficult to control, and the material of the reverse osmosis membrane is easy to be damaged during the modification process, although the anti-pollution performance of the reverse osmosis membrane can be improved. , but due to the large volume of the grafted polymer itself, it will cause a large pressure drop in the reverse osmosis membrane separation process, and the pressure drop will make the water flux of the osmotic membrane drop significantly, which will eventually lead to a substantial increase in operating costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) First, pour polyethylene wax with a molecular weight of 2500-3500 into a container equipped with a stirring and reflux condensing device, add isooctane, heat the material inside the container to 115-120°C, and continuously stir the material inside Until the polyethylene wax is completely dissolved, the polyethylene wax mother liquor is obtained. The polyethylene wax mother liquor is composed of polyethylene wax and isooctane in a mass ratio of 33:80.

[0020] 2) Mix 100kg of benzoxazine resin, 20kg of sulfonated polyetheretherketone, 8kg of m-phenylenediamine, 12kg of melamine, 6kg of triethylenediamine, and 5kg of 2-methyl Dimethylimidazole, 7kg of diethylenetriamine, 55kg of potassium bicarbonate passing through a 10,000 mesh sieve, and 300kg of dimethylformamide are dispersed and mixed in a reactor equipped with an emulsifier to make an impregnation solution .

[0021] 3) Coat the polyethylene wax mother liquor on the surface of the RO membrane, then dry it at 1...

Embodiment 2

[0024] 1) First, pour polyethylene wax with a molecular weight of 2500-3500 into a container equipped with a stirring and reflux condensing device, add isooctane, heat the material inside the container to 115-120°C, and continuously stir the material inside Until the polyethylene wax is completely dissolved, the polyethylene wax mother liquor is obtained. The polyethylene wax mother liquor is composed of polyethylene wax and isooctane in a mass ratio of 37:80.

[0025] 2) Mix 100kg of benzoxazine resin, 22kg of sulfonated polyether ether ketone, 8.9kg of m-phenylenediamine, 13kg of melamine, 6.7kg of triethylenediamine, 6kg of 2-methyl Diethyl imidazole, 7.9kg of diethylenetriamine, 63kg of potassium bicarbonate passing through a 10,000 mesh sieve, and 330kg of dimethylformamide are dispersed and mixed in a reactor equipped with an emulsifier to make an impregnation solution .

[0026] 3) Coat the polyethylene wax mother liquor on the surface of the RO membrane, then dry it ...

Embodiment 3

[0029] 1) First, pour polyethylene wax with a molecular weight of 2500-3500 into a container equipped with a stirring and reflux condensing device, add isooctane, heat the material inside the container to 115-120°C, and continuously stir the material inside Until the polyethylene wax is completely dissolved, the polyethylene wax mother liquor is obtained. The polyethylene wax mother liquor is composed of polyethylene wax and isooctane in a mass ratio of 39:80.

[0030] 2) Mix 100kg of benzoxazine resin, 25kg of sulfonated polyetheretherketone, 9kg of m-phenylenediamine, 15kg of melamine, 8kg of triethylenediamine, and 7kg of 2-methyl Diethyl imidazole, 9kg of diethylenetriamine, 65kg of potassium bicarbonate passing through a 10,000 mesh sieve, and 350kg of dimethylformamide are dispersed and mixed in a reactor equipped with an emulsifier to make an impregnation solution .

[0031] 3) Coat the polyethylene wax mother liquor on the surface of the RO membrane, then dry it at 1...

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Abstract

The invention relates to a high-flux strongly-anti-pollution RO (reverse osmosis) functional membrane, which is prepared by comprising the following steps: coating polyethylene wax mother liquor ontothe surface of an RO membrane, then drying at 120-125 DEG C, and naturally cooling to obtain a rough membrane blank; coating contained liquor onto the surface of the rough membrane blank, reacting at130-135 DEG C, to obtain a cured membrane; rinsing the cured membrane with isooctane at 120-125DEG C, drying at 120-125DEG C after rinsing, rinsing with deionized water, and naturally airing, to obtain a finished product. The finished product has excellent membrane separation performance, anti-pollution performance, and high water flux; the functional membrane is easy to clean, and has strong anti-pollution and self-cleaning performances, and the water flux can be greatly restored after the functional membrane is polluted; and the cleaning frequency is low and the service life is long.

Description

technical field [0001] The invention relates to a RO reverse osmosis functional membrane with high throughput and strong antifouling, and belongs to the technical field of filtration. Background technique [0002] The membrane element is the core component of the reverse osmosis water purifier. The membrane element usually uses a reverse osmosis membrane. The membrane element is made of a reverse osmosis membrane, a pure water diversion net, and a raw water diversion net wrapped around the water collection pipe, and the outer periphery is wrapped with waterproof tape. Fixed to form a cylindrical membrane element, small holes are set on the water collection pipe to collect filtered water and then discharged from the water outlet. [0003] Membrane fouling is recognized as a major technical problem in the field of reverse osmosis membranes. Membrane fouling refers to the physical or chemical interaction between inorganic ions, colloids, organic matter, microorganisms, etc. in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/02B01D67/00
CPCB01D61/025B01D67/0088B01D67/0093B01D2325/30
Inventor 熊治张飞虎胡友志田世长
Owner 安徽智泓净化科技股份有限公司
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