Preparation method of polyamide reverse osmosis membrane

A technology of reverse osmosis membrane and polyamide, which is applied in the field of preparation of reverse osmosis membrane, can solve the problems of physical injury of operators, high requirements for corrosion resistance, high energy consumption of production line operation, etc., and achieve high water flux and low residual amount , Process mild effect

Active Publication Date: 2015-04-01
HANGZHOU WATER TREATMENT TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Warm hot water rinsing treatment can easily cause the occlusion of the effective pores of the polysulfone support layer, resulting in a decrease in the water flux of the membrane, and the energy consumption of the production li

Method used

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  • Preparation method of polyamide reverse osmosis membrane
  • Preparation method of polyamide reverse osmosis membrane
  • Preparation method of polyamide reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Except that the average range of surface pore diameter is between 10-30nm, the deviation value is 1.68, and the number of 20-25nm pores is 480 / um 2 , its pure water flux is 209L / m 2 / h of the porous polysulfone support membrane, the rest of the steps are the same as in Comparative Example 1.

Embodiment 2

[0057] Except that the m-phenylenediamine mass percentage concentration is 3.0 and is fully mixed to prepare an m-phenylenediamine aqueous solution with a pH of 4.99, the rest of the steps are the same as in Example 1.

Embodiment 3

[0059] The remaining steps are the same as in Example 1, except that the m-phenylenediamine mass percentage concentration is 4.0 and is fully mixed to prepare an m-phenylenediamine aqueous solution with a pH of 5.12.

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Abstract

The invention discloses a preparation method of a reverse osmosis membrane, and more particularly relates to a high-desalting-rate and high-flux reverse osmosis membrane with extreme convenience in rinsing treatment and a preparation method of the high-desalting-rate and high-flux reverse osmosis membrane. According to the invention, a porous polysulfone support layer is provided with a functional compact composite layer which is a m-phenylenediamine aqueous solution formed by organic acid or an aquo-complex thereof, which contains one or more than one hydroxyl, and organic alkali in a buffer salt system, and the porous polysulfone support layer is subjected to polycondensation together with an organic solvent solution of trimesoyl chloride containing a certain amount of additives on the surface of the porous polysulfone support layer. The preparation method of the reverse osmosis membrane has the advantages that the required rinsing treatment technology is mild, simple and efficient; the total residual amount of the unreacted amine in the membrane after rinsing is low, and industrial continuous rapid preparation can be realized easily.

Description

technical field [0001] The invention relates to a preparation method of a reverse osmosis membrane, and more specifically relates to a high desalination rate and high flux reverse osmosis membrane with extremely convenient rinsing treatment and a preparation method thereof. Background technique [0002] Reverse osmosis membrane is a kind of filter membrane, which has the special property that water molecules can pass through, but impurities other than water such as ions and salt molecules cannot pass through. Its membrane pore size is less than 2 nanometers, which is smaller than that of nanofiltration membrane and ultrafiltration membrane. Because of its outstanding advantages such as high water production and energy consumption ratio, it has been widely used in seawater desalination, brackish water desalination, wastewater treatment, and pharmaceutical industries. With the increase of the world's population and economic development, the demand for water is also increasing...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D67/00B01D69/12B01D69/10B01D69/06B01D69/08
Inventor 王铭潘巧明张宇
Owner HANGZHOU WATER TREATMENT TECH DEV CENT
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