A kind of synthetic method of hierarchical pore nano titanium silicon molecular sieve/alumina composite material

A technology of silicon molecular sieve and synthesis method, which is applied in molecular sieve catalysts, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of limiting the transmission and diffusion of large-sized guest molecules, catalyst deactivation, and single channels, etc., to achieve Effects of improving flow diffusion performance, improving diffusion performance, and increasing service life

Inactive Publication Date: 2019-05-24
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional TS-1 zeolite molecular sieve has a single channel, and the micropore channel size is maintained at about 0.55nm, which greatly limits the transmission and diffusion of larger-sized guest molecules, which easily leads to channel blockage and catalyst deactivation.

Method used

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  • A kind of synthetic method of hierarchical pore nano titanium silicon molecular sieve/alumina composite material
  • A kind of synthetic method of hierarchical pore nano titanium silicon molecular sieve/alumina composite material
  • A kind of synthetic method of hierarchical pore nano titanium silicon molecular sieve/alumina composite material

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Effect test

Embodiment 1

[0036] A graded hole nano titanium silicon molecular sieve / alumina composite material, the preparation method of which comprises the following steps:

[0037] Add 12.24g of tetrapropylammonium hydroxide solution with a mass fraction of 99.99% to 18.5g of tetrapropylammonium hydroxide solution with a mass fraction of 99.99%, and mix and stir for 3 hours (25°C) to obtain a mixed solution I; % tetrabutyl titanate was dispersed in 3.3g of isopropanol and mixed and stirred for 1 hour (25°C) to obtain mixed solution II; the obtained mixed solution II was added dropwise to mixed solution I and stirred for 12h (25°C), then added 23.82g deionized water to obtain the precursor solution of nano-titanium silicon molecular sieve; transfer the obtained precursor solution to a 100ml high-pressure reactor, carry out crystallization treatment at 80°C for 24 hours, wash the obtained product with water and suction filter, and then transfer to Dry in a drying oven at 60°C for 24 hours, then roast...

Embodiment 2

[0040] A graded hole nano titanium silicon molecular sieve / alumina composite material, the preparation method of which comprises the following steps:

[0041] Add 12.24g of tetrapropylammonium hydroxide solution with a mass fraction of 99.99% to 15.3g of tetrapropylammonium hydroxide solution with a mass fraction of 99.99%, and mix and stir for 3 hours (25° C.) to obtain a mixed solution I; % tetrabutyl titanate was dispersed in 2.72g isopropanol and mixed and stirred for 1 hour (25°C) to obtain mixed solution II; the obtained mixed solution II was added dropwise to mixed solution I and stirred for 12h (25°C), then 23.82g of deionized water to obtain the precursor solution of nano-titanium silicon molecular sieve; transfer the obtained precursor solution to a 100ml high-pressure reactor, carry out crystallization treatment at 100°C for 24 hours, wash the obtained product with water, and then transfer it to Dry in a drying oven at 60°C for 24 hours, and then roast at 550°C for ...

Embodiment 3

[0044] A graded hole nano titanium silicon molecular sieve / alumina composite material, the preparation method of which comprises the following steps:

[0045] Add 12.24g of tetrapropylammonium hydroxide solution with a mass fraction of 99.99% to 23.5g of tetrapropylammonium hydroxide solution with a mass fraction of 99.99%, and mix and stir for 3 hours (25°C) to obtain a mixed solution I; % tetrabutyl titanate was dispersed in 2.5g isopropanol and mixed and stirred for 1 hour (25°C) to obtain mixed solution II; the obtained mixed solution II was added dropwise to mixed solution I, stirred for 12h (25°C), and then added 23.82g of deionized water to obtain the precursor solution of nano-titanium silicon molecular sieve; transfer the obtained precursor solution to a 100ml high-pressure reactor, carry out crystallization treatment at 120°C for 24 hours, wash the obtained product with water and suction filter, and then transfer to Dry in a drying oven at 60°C for 24 hours, and then...

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Abstract

The invention provides a synthetic method of a grade pore nanometer titanium-silicon molecular sieve TS-1 / aluminum oxide composite. The method comprises the following steps of firstly synthesizing TS-1 molecular sieve nano particles by a hydrothermal method, and then synthesizing TS-1 loaded stair pore aluminum oxide composite by a one-step drip method. According to the synthetic method disclosed by the invention, nanometer TS-1 is embedded into a porous aluminum oxide framework, so that the pore-pore penetration of macro-pores, meso-pores and micro-pores is realized. The synthetic method disclosed by the invention is simple and easy to operate, operating conditions are easy to control, the synthetic cycle is short, and the synthetic method is hopefully and widely applied in industrial production.

Description

technical field [0001] The invention belongs to the technical field of synthesis of molecular sieve composite materials, and in particular relates to a method for synthesizing novel grade-pore nanometer titanium-silicon molecular sieve / alumina composite materials. Background technique [0002] As one of the important pillars of the national economy, the chemical industry and its related industries have created a large amount of material wealth for human society. About 90% of the chemicals supplied by the modern synthetic chemical industry are realized by means of catalytic processes. Among them, zeolite molecular sieve plays an irreplaceable role as an environment-friendly catalyst. However, the by-products and pollution produced in the chemical industry are a serious threat to human life and health and the biodiversity of nature. Therefore, "green chemistry" has become a hot spot and frontier of current chemistry and chemical technology. Since the appearance of TS-1, a t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/06C01B39/08
CPCB01J29/06C01B39/08
Inventor 苏宝连刘豪陈丽华
Owner WUHAN UNIV OF TECH
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