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Metal fiber/molecular sieve composite material and its preparation method and its application

A metal fiber and composite material technology, applied in molecular sieve catalysts, oxime preparation, chemical instruments and methods, etc., can solve the problems of easy peeling and difficult growth of molecular sieves, and achieve the effects of low operating cost, simple preparation method and controllable structure.

Active Publication Date: 2012-10-17
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesized structured molecular sieve materials reported in the above literature not only need multiple hydrothermal crystallizations to achieve a higher molecular sieve loading capacity, but also the angular characteristics of the cavity structure of the foam material will cause these parts to be difficult to grow molecular sieves due to huge stress. and easy to peel off

Method used

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  • Metal fiber/molecular sieve composite material and its preparation method and its application
  • Metal fiber/molecular sieve composite material and its preparation method and its application
  • Metal fiber/molecular sieve composite material and its preparation method and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Preparation of monolithic sintered metal fibers

[0052] Weigh 5 grams of nickel metal fibers with a diameter of 8 microns and a length of 2 to 5 mm, 1.7 grams of paper fibers with a length of 0.1 to 1 mm, and 1.5 liters of water, and add them to a mixer, and fully stir them into a uniformly dispersed fiber slurry; Transfer the obtained fiber slurry to the paper machine, add water to 8.5 liters, stir, drain and shape; after being dried, bake at 350°C for 1 hour in an air atmosphere; then sinter at 950°C for 1 hour in a hydrogen atmosphere, that is A monolithic sintered nickel metal fiber with a diameter of 8 microns was obtained, which was denoted as Ni-8.

[0053] 2. Preparation of monolithic sintered metal fiber matrix pre-coated with MFI molecular sieve seeds

[0054] Take by weighing 10 grams of 30% silica sol, join in the beaker that fills 290 grams of deionized water, mix; Then add 0.3 grams of MFI type silica-alumina (SiO 2 / Al 2 o 3 =180) molecular sieve ...

Embodiment 2

[0062] 1. Preparation of monolithic sintered metal fibers

[0063] As described in Example 1.

[0064] 2. Preparation of monolithic sintered metal fiber matrix pre-coated with MFI molecular sieve seeds

[0065] Take by weighing 10 grams of 30% silica sol, join in the beaker that fills 290 grams of deionized water, mix; Then add 0.3 grams of MFI type silica-alumina (SiO 2 / Al 2 o 3 =180) molecular sieve crystal seed, mixing; prepared containing MFI type molecular sieve seed crystal 0.1wt%, containing SiO 2 1wt% suspension;

[0066] The monolithic sintered metal fiber Ni-8 prepared in the previous step with a shear area of ​​80 square centimeters (2 grams) was used as a matrix, first placed in distilled water for 0.5 hours of ultrasonication, and then placed in a 100°C oven for drying; then it was Immerse in the prepared MFI-type molecular sieve seed crystal containing 0.1wt%, containing SiO 2 1wt% suspension, keep it for 10 seconds, take it out, dry it in the shade overni...

Embodiment 3

[0073] 1. Preparation of monolithic sintered metal fibers

[0074] As described in Example 1.

[0075] 2. Preparation of monolithic sintered metal fiber matrix pre-coated with MFI molecular sieve seeds

[0076] Take by weighing 10 grams of 30% silica sol, join in the beaker that fills 290 grams of deionized water, mix; Then add 3 grams of MFI type silica-alumina (SiO 2 / Al 2 o 3 =180) molecular sieve crystal seed, mixing; prepared containing MFI type molecular sieve seed crystal 1wt%, containing SiO 2 1wt% suspension;

[0077] The monolithic sintered metal fiber Ni-8 prepared in the previous step with a shear area of ​​12 cm2 (0.30 g) was used as a matrix, put into distilled water for 0.5 hours of ultrasonication, and then placed in an oven at 100 ° C for drying; then it was Submerged in the prepared MFI-type molecular sieve seeds containing 1wt%, containing SiO 2 1wt% suspension, keep it for 10 seconds, take it out, dry it in the shade overnight, put it in a muffle furn...

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Abstract

The invention discloses a metal fiber / molecular sieve composite material and its preparation method and application. The composite material is formed by an integral sintered metal fibrous matrix and an MFI type molecular sieve layer uniformly coated on the outer surface of the each metal fiber of the matrix, and is prepared by using a sol precoated layer and a hydrothermal crystallization growth method. The metal fiber / molecular sieve composite material possesses a three dimensional opening style continuous network structure, the void ratio can reach 68%-85%, the permeability is high, the thermal conductivity is good and the structure is stable, the composite material possesses excellent catalytic effects of catalytic reaction of methanol prepared by olefin and catalytic reaction of a cyclohexanone peroxide ammoximation fixed bed, and the invention has the advantages of simple preparation method and controllable structure, is suitable for industrial production, and has the practical value and application prospect.

Description

technical field [0001] The invention relates to a metal fiber / molecular sieve composite material and its preparation method and application, in particular, it relates to a three-dimensional open continuous network composed of an integral sintered metal fiber matrix and an MFI molecular sieve layer grown on it. The metal fiber structured MFI type molecular sieve composite material and its preparation method and application belong to the technical field of molecular sieve materials. Background technique [0002] At present, the artificially synthesized zeolite molecular sieves are all in the form of powder, and their size can be determined by operating parameters such as the concentration of the crystallization solution and the crystallization time. Molecular sieves have been widely used in adsorption separation and heterogeneous catalytic reactions due to their uniform pore size and high shape selectivity. In order to further solve many problems existing in the current appli...

Claims

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Application Information

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IPC IPC(8): B01J29/46B01J29/89B01J29/035B01J29/40C07C11/04C07C11/06C07C11/02C07C1/20C07C251/44C07C249/04
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 路勇孙瑛王翔宇刘晔何鸣元
Owner EAST CHINA NORMAL UNIVERSITY
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