High-yield synthetic method for DD3R molecular sieve film

A synthesis method and molecular sieve technology, which are applied in the field of synthesis of DD3R molecular sieve membranes, can solve the problems of easily generating defects, affecting the industrial application of molecular sieve membranes, and removing complex preparation methods, and achieving the effect of a simple synthesis process.

Active Publication Date: 2017-05-10
山东嘉驰新材料股份有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, at present, its industrial application is less. Apart from the complicated preparation method, it is also a very important reason that it is prone to defects during the roasting process.
The DD3R molecular sieve membrane uses 1-adamantanamine as a template in the preparation process. In order to ensure that the pore size of the molecular sieve is not occupied by the template, high-temperatur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] 1. Preparation of Vectors

[0031] (1) Preparation of chip carrier

[0032] The prepared sigma-1 molecular sieve was mechanically crushed for 8 hours to prepare an amorphous Sigma-1 molecular sieve, which was mixed with α-alumina (d50=0.80 μm) at a mass ratio of 1:1, and an appropriate amount of paraffin and polyvinyl alcohol were added , after repeated grinding, put it into a pressure mold to press into a chip carrier precursor, calcined at 1000°C to make a chip carrier, soak it in clean water, rinse, and dry it for later use.

[0033] (2) Preparation of hollow fiber carrier

[0034] The prepared sigma-1 molecular sieve was mechanically crushed for 8 hours to prepare an amorphous Sigma-1 molecular sieve, which was mixed with α-alumina (d50=0.80 μm) at a mass ratio of 1:1. Dissolve polyvinylpyrrolidone and polyethersulfone in 1-methyl-2-pyrrolidone, stir continuously for 1 h to form a homogeneous polymer solution, add α-Al2O3 ceramic powder (d50=0.80 μm) and stir cont...

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Abstract

The invention discloses a high-yield synthetic method for a DD3R molecular sieve film. The high-yield synthetic method comprises the following steps: mixing a sigma-1 molecular sieve with inorganic particles to prepare a carrier; further crystalizing a DD3R molecular sieve layer on the carrier by adopting a secondary growth method; finally preparing the DD3R molecular sieve film layer by adopting a hierarchical sintering method. The molecular sieve film prepared by the method has the advantages of prevention of defects and high yield.

Description

technical field [0001] The invention relates to a method for manufacturing a molecular sieve membrane, in particular to a method for synthesizing a defect-free DD3R molecular sieve membrane. Background technique [0002] Molecular sieves can be used as adsorbents, catalysts, carriers, etc. in today's industry. In addition, using the adsorption and sieving effects of molecular sieves, zeolite laminated composites formed on porous substrates made of metal or ceramics can be used in gas separation membranes and pervaporation membranes. In view of the above circumstances, zeolite laminated composites using various porous substrates and methods for producing them have been proposed. According to different crystal structures, molecular sieves have different configurations, such as LTA, MFI, MOR, AFI, FER, FAU, DDR, etc. Among these types, DD3R (Deca-Dodecasil3R) is a crystal whose main component is composed of silicon dioxide, and its micropores are formed by polyhedrons contain...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/08B01D69/02B01D67/00
CPCB01D67/0041B01D67/0044B01D67/0076B01D69/02B01D69/087B01D71/025B01D71/028B01D2323/06
Inventor 耿逸豪
Owner 山东嘉驰新材料股份有限公司
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