Microwave apparatus and method for synthesizing molecular sieve film

A technology of microwave devices and molecular sieves, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as uneven temperature

Active Publication Date: 2009-04-01
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The report of Julbe et al. shows that when the height of the reactor is increased, the conventional microwave oven is still used for heating, and the phenomenon of temperature inhomogeneity will appear.

Method used

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  • Microwave apparatus and method for synthesizing molecular sieve film
  • Microwave apparatus and method for synthesizing molecular sieve film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 The microwave device for synthesizing molecular sieve membranes of the present invention is composed of a microwave power source 1 , a microwave transmission system 2 , a microwave reactor 3 and a control system 4 . The power of the microwave power source 1 is controlled by the control system 4, and enters the microwave cavity 5 of the microwave reactor 3 via the microwave transmission system 2; the microwave transmission system 2 adopts a known coaxial cable or a rectangular waveguide. The microwave cavity 5 is a single-mode or multi-mode microwave cavity closed by a metal wall, and its three-dimensional size is mainly determined by the size of the object to be processed (the size of the object to be processed determines the size of the reactor), the power density and the cavity mode. How much and distribution to determine. The microwave reactor 3 can be connected with 1 to 30 microwave power sources 1 and the microwave transmission system 2 at differ...

Embodiment 2

[0033] use figure 1 The device synthesizes the molecular sieve membrane, and the specific steps are:

[0034] (a) Place the tubular carrier 8 (such as porous ceramics, porous metal, porous carbon material carrier, etc.) used for synthesizing the molecular sieve membrane in the reaction kettle 6, add the synthesis liquid required for the synthesis, and then seal it with the lid of the kettle.

[0035]Synthetic liquid is made by mixing silicon source, aluminum source, mineralizer, structure directing agent and water; silicon source can be sodium silicate, white carbon black, tetraethyl orthosilicate, orthomethyl silicate, silica sol or / and silicic acid; the aluminum source can be sodium aluminate, sodium metaaluminate, aluminum isopropoxide, aluminum flakes or / and aluminum powder; the mineralizer can be hydrofluoric acid, ammonium fluoride, sodium hydroxide or / and hydrogen Potassium oxide; the structure directing agent can be organic ammonium, quaternary ammonium salt, alcohol...

Embodiment 3

[0041] Comparison of conventional heating, household microwave heating, and microwave device of the present invention for synthesizing type A molecular sieve membrane.

[0042] The type A molecular sieve membrane was synthesized by microwave heating and conventional heating respectively. Wherein, the microwave synthesis is carried out in the household microwave oven and the microwave device of the present invention respectively. Specifically, the microwave device has the following characteristics: a rectangular multi-mode resonant cavity is adopted, and the cavity size is: 50cm long, 50cm wide, and 120cm high; 7 and 8 700w magnetrons are placed on the two sides of the cavity respectively. Tube.

[0043] The separation performance of the synthesized molecular sieve membrane was characterized by measuring the pervaporation dehydration performance of 90% ethanol solution at 65°C.

[0044] Table 1 Comparison Results

[0045]

[0046] As can be seen from Table 1, compa...

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PUM

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Abstract

The invention provides a microwave device for synthesizing molecular sieve membrane and a method thereof; wherein, the device comprises a microwave power source 1, a microwave transmission system 2, a microwave reactor 3 and a control system 4; the microwave power source 1 controlled by the control system 4 enters the microwave reactor 3 by the microwave transmission system 2; wherein, the microwave reactor 3 consists of a microwave chamber 5, a reaction kettle 6 and a rotation pallet 7; the reaction kettle 6 is arranged in the microwave chamber 5 and on the rotation pallet 7; the technical proposal aims at the industrial amplification synthesis of the molecular sieve membrane and provides the device for the synthesis of the molecular sieve membrane microwave and the method thereof. The invention is used for achieving the object of quick synthesis of molecular sieve membrane (such as molecular sieve membrane supported by long pipe-shaped carrier) in large area, shortens the synthesis time and improves the permeation flux.

Description

technical field [0001] The invention relates to a microwave device and method for synthesizing molecular sieve membranes. Background technique [0002] For nearly half a century, with the aggravation of energy shortage and people's increasing awareness of environmental protection, traditional high energy consumption and high pollution industries are in urgent need of large-scale technological reforms. Membrane separation technology is widely used in chemical, Food, medicine, environmental protection, metallurgy and other industrial sectors have been more and more widely used. [0003] Molecular sieve membrane is a new type of inorganic membrane developed in the past ten years. It has the advantages of general inorganic membranes such as high temperature resistance, chemical and biological erosion resistance, high mechanical strength, and large flux. At the same time, it has the structural characteristics of molecular sieves: regular pore structure, with molecular sieving p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/02B01D71/02
Inventor 杨维慎李砚硕
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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