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Acid-resistant nanofiltration membrane as well as preparation method and application thereof

A nanofiltration membrane and acid-resistant technology, which is applied in the field of membrane separation, can solve the problems of low reactivity of cyanuric chloride, high difficulty in large-scale preparation, high price of polyethyleneimine, etc., and is conducive to industrial scale production, Easy to repeat and improve the effect of conjugation stability

Active Publication Date: 2021-04-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the organic phase reactant of the acid-resistant nanofiltration membrane, cyanuric chloride, has low reactivity, requires the concentration of the aqueous phase reactant to be as high as 15g / L, and polyethyleneimine is expensive, and it is difficult to prepare on a large scale in industry.

Method used

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  • Acid-resistant nanofiltration membrane as well as preparation method and application thereof
  • Acid-resistant nanofiltration membrane as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0057] In this embodiment, an acid-resistant nanofiltration membrane is provided, the acid-resistant nanofiltration membrane includes a support membrane and an active separation layer loaded on the support membrane, and the active separation layer includes a water phase reactant and an oil phase reactant The interfacial polymerization product, the water phase reactant includes 3-aminobenzenesulfonamide, triethylamine and sodium dodecylsulfonate, and the oil phase reactant includes trimesoyl chloride.

[0058] The preparation method comprises the following steps:

[0059] (1) The aqueous phase reactant solution containing 3-aminobenzenesulfonamide, triethylamine and sodium dodecylsulfonate is prepared by physical blending method, so that every 100g of said aqueous phase reactant solution contains 0.2g of 3-aminobenzenesulfonamide, 0.2g of triethylamine and 0.2g of sodium dodecylsulfonate, adjust the pH of the solution to be 11.5;

[0060] (2) taking n-hexane as a solvent to pr...

Embodiment 2

[0066] In this embodiment, an acid-resistant nanofiltration membrane is provided, the acid-resistant nanofiltration membrane includes a support membrane and an active separation layer loaded on the support membrane, and the active separation layer includes a water phase reactant and an oil phase reactant The interfacial polymerization product, the water phase reactants include sulfapyridine, triethylamine and sodium dodecylsulfonate, and the oil phase reactants include trimesoyl chloride.

[0067] The preparation method comprises the following steps:

[0068] (1) The aqueous phase reactant solution containing sulfapyridine, triethylamine and sodium dodecyl sulfonate is prepared by physical blending method, so that 0.1g of sulfapyridine, 0.1 g of sulfapyridine, 0.1 The triethylamine of 1g and the sodium dodecylsulfonate of 0.1g adjust the pH of the solution to be 11;

[0069] (2) taking n-hexane as a solvent to prepare an oil phase reactant solution containing trimesoyl chlori...

Embodiment 3

[0075] In this embodiment, an acid-resistant nanofiltration membrane is provided, the acid-resistant nanofiltration membrane includes a support membrane and an active separation layer loaded on the support membrane, and the active separation layer includes a water phase reactant and an oil phase reactant The interfacial polymerization product, the water phase reactant includes 3-aminobenzenesulfonamide, sodium hydroxide and sodium dodecylbenzenesulfonate, and the oil phase reactant includes trimesoyl chloride.

[0076] The preparation method comprises the following steps:

[0077] (1) The aqueous phase reactant solution containing 3-aminobenzenesulfonamide, sodium hydroxide and sodium dodecylbenzenesulfonate is prepared by physical blending method, so that every 100g of said aqueous phase reactant solution contains 1g of 3-aminobenzenesulfonamide, 0.01g of sodium hydroxide and 0.05g of sodium dodecylbenzenesulfonate, adjust the pH of the solution to be 12;

[0078] (2) taking...

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Abstract

The invention provides an acid-resistant nanofiltration membrane as well as a preparation method and application thereof. The acid-resistant nanofiltration membrane comprises a support membrane and an active separation layer loaded on the support membrane; the separation layer comprises an interfacial polymerization product of a water-phase reactant and an oil-phase reactant, and the water-phase reactant comprises a sulfonamide monomer, an acid acceptor and a surfactant. The preparation method comprises the steps: (1) impregnating the support membrane with a water-phase reactant solution, taking out the support membrane and removing a surface solution; (2) impregnating the support membrane with an oil-phase reactant solution to perform interfacial polymerization reaction, taking out the support membrane, and removing a surface oil-phase solution; and (3) repeatedly carrying out treatment of the step (1) and the step (2) on the support membrane obtained in the step (2) to obtain the acid-resistant nanofiltration membrane. The acid-resistant nanofiltration membrane disclosed by the invention has relatively good inorganic salt ion separation capability, structural stability under an acidic condition and controllable separation capability.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and relates to an acid-resistant nanofiltration membrane and its preparation method and application. Background technique [0002] As a new green and efficient separation technology, nanofiltration membrane separation has been widely used in drinking water treatment, waste water recycling, small molecule desalination and Decolorization of biological products and other fields. Among them, interfacial polymerized polyamide nanofiltration membrane has become the most successful nanofiltration membrane in industrial applications due to its advantages such as simple preparation process, high permeation flux, stable structure, and good anti-pollution performance. However, with the continuous development of the industry, the diversification and complexity of the separation system requires the separation membrane not only to have good separation selectivity, but also to have a certain struct...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D69/10B01D71/68B01D71/42B01D67/00C02F1/44C02F101/10C02F101/12
CPCB01D69/02B01D69/10B01D71/68B01D67/0002B01D71/42C02F1/442C02F2101/101C02F2101/12Y02A20/131
Inventor 罗建泉曹阳陈向荣冯世超万印华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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