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Zeolite membrane and preparation method thereof

A zeolite membrane and a zeolite technology, which are applied in the field of membrane separation, can solve the problems such as the difficulty of zeolite regeneration in the separation of zeolite and water, and achieve the effects of simple preparation method, efficient interception and good water permeability.

Active Publication Date: 2021-06-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But zeolite can only treat NH in water 4 + Plasma pollutants, and when zeolite is directly used as an ion exchanger, it will take time to separate zeolite from water, and zeolite regeneration is difficult. Preparation of zeolite into a membrane is one of the effective ways to solve the above problems

Method used

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  • Zeolite membrane and preparation method thereof
  • Zeolite membrane and preparation method thereof

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Effect test

Embodiment 1

[0028] The present embodiment provides a kind of preparation method of zeolite membrane, specifically as follows:

[0029] Add 10 g of N-methylpyrrolidone solution of polyvinylidene fluoride with a mass concentration of 6% dropwise into 10 g of natural clinoptilolite, grind and stir thoroughly, then scrape-coat it on a non-woven fabric with a thickness of 0.5 μm, and dry After drying, the zeolite membrane can be prepared. The actual picture of the prepared zeolite membrane is shown in figure 1 shown.

Embodiment 2

[0031] The present embodiment provides a kind of preparation method of zeolite membrane, specifically as follows:

[0032] Add 10 g of N-methylpyrrolidone solution of polyvinylidene fluoride with a mass concentration of 8% dropwise to 10 g of natural clinoptilolite, grind and stir thoroughly, and scrape-coat it on a non-woven fabric with a thickness of 0.7 μm. After drying, the zeolite membrane can be prepared.

Embodiment 3

[0034] The present embodiment provides a kind of preparation method of zeolite membrane, specifically as follows:

[0035] Add 15g of N-methylpyrrolidone solution of polyvinylidene fluoride with a mass concentration of 10% dropwise to 10g of artificial zeolite, grind and stir thoroughly, then scrape-coat it on a non-woven fabric with a thickness of 0.9μm, and dry it The zeolite membrane can be prepared.

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Abstract

The invention provides a zeolite membrane and a preparation method thereof, and the method comprises the following steps: dropwise adding an organic binder solution into zeolite, fully conducting grinding and stirring, conducting blade-coating on a substrate according to a certain thickness, and conducting drying to obtain the zeolite membrane. The prepared zeolite membrane does not need a complex crystal hydrothermal growth process, natural zeolite or artificial zeolite can be directly used for preparing the membrane, and the prepared zeolite membrane has the characteristics of simple preparation method, low cost, good water permeability, high pollutant rejection rate, high zeolite loading capacity and the like. When the zeolite membrane is used for interception treatment of pollutants in water, not only can macromolecular pollutants in water be intercepted, but also efficient interception of ammonia nitrogen can be realized by utilizing the ion exchange characteristic of zeolite, and the zeolite membrane is suitable for advanced treatment of sewage.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a zeolite membrane and a preparation method thereof. Background technique [0002] As the main component of nitrogen compounds in water, ammonia nitrogen is a key substance that causes eutrophication of water bodies, so it is very important to remove ammonia nitrogen in wastewater. At present, the common methods for removing ammonia nitrogen include biological method, chemical method and reverse osmosis membrane method. However, biological methods are easily affected by water quality fluctuations and external environments, with long treatment cycles and complex operations, making it difficult to treat ammonia nitrogen wastewater with low organic content. The chemical method needs to add chemical reagents when removing ammonia nitrogen, the cost is high and harmful by-products are easily produced. Reverse osmosis membrane treatment of ammonia nitrogen has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/10B01D69/12C02F1/42C02F1/44
CPCB01D69/12C02F1/42C02F1/441B01D69/1071B01D71/0281B01D67/0079B01D69/148C02F1/44C02F2101/16C02F1/444B01D71/32B01D71/38B01D71/24B01D71/12B01D61/025B01D67/00091B01D67/0083B01D67/0095B01D69/02B01D71/34B01D2323/12B01D2323/14B01D2325/04C02F2101/38
Inventor 王志伟史威周慧敏王雪野
Owner TONGJI UNIV
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