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High-flux strongly-anti-pollution RO (reverse osmosis) functional membrane

A high-flux, reverse osmosis technology, applied in reverse osmosis, semi-permeable membrane separation, membrane and other directions, can solve the problems of water flux decline of permeable membrane, difficult control of reactivity, and increase in operating cost, and achieve water flux recovery. , Excellent membrane separation performance, the effect of low cleaning frequency

Active Publication Date: 2018-12-07
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

[0020] 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.

[0021] 2) React 100kg of polyetheretherketone and 2000kg of polyetheretherketone with a mass fraction of 96% at 70-72°C for 6 hours, use ice water to rapidly cool down and precipitate the product, filter, wash and dry to obtain sulfonated polyetheretherketone.

[0022] 3), 100kg of benzoxazine resin, 20kg of sulfonated polyether ether ketone, 8kg of m-phenylenediamine, 12kg of melamine, 6kg of triethylenediamine, 5kg of 2-methylimidazole, 7kg of di Ethylenetriamine, 55kg of potassium bicarbonate passed through a 10,00...

Embodiment 2

[0026] 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.

[0027] 2) React 100kg of polyetheretherketone and 2000kg of polyether ether ketone with a mass fraction of 98% at 70-72°C for 7 hours, use ice water to rapidly cool down the temperature to precipitate the product, filter, wash and dry to obtain sulfonated polyetheretherketone.

[0028] 3), 100kg of benzoxazine resin, 22kg of sulfonated polyetheretherketone, 8.9kg of m-phenylenediamine, 13kg of melamine, 6.7kg of triethylenediamine, 6kg of 2-methylimidazole, 7.9 kg of diethylenetriamine, 63 kg of potassium bicarbonate ...

Embodiment 3

[0032] 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.

[0033] 2) React 100kg of polyetheretherketone and 2000kg of polyether ether ketone with a mass fraction of 98% at 70-72°C for 8 hours, use ice water to rapidly cool down and precipitate the product, filter, wash and dry to obtain sulfonated polyetheretherketone.

[0034] 3), 100kg of benzoxazine resin, 25kg of sulfonated polyether ether ketone, 9kg of m-phenylenediamine, 15kg of melamine, 8kg of triethylenediamine, 7kg of 2-methylimidazole, 9kg of di Ethylenetriamine, 65 kg of potassium bicarbonate passed through a 10...

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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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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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