Preparation method for Ti/MCM-41 molecular sieve having catalytically oxidizing activity and application thereof

A MCM-41, catalytic oxidation technology, applied in molecular sieve catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as low catalytic oxidation desulfurization efficiency, and achieve low cost, simple preparation process, and mild reaction conditions. Effect

Inactive Publication Date: 2016-06-15
HARBIN INST OF TECH
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  • Claims
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Problems solved by technology

[0005] The present invention aims to solve the problem of low catalytic oxidation desulfurization efficiency of Ti/MCM-41 molecular sieve pre

Method used

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  • Preparation method for Ti/MCM-41 molecular sieve having catalytically oxidizing activity and application thereof
  • Preparation method for Ti/MCM-41 molecular sieve having catalytically oxidizing activity and application thereof

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specific Embodiment approach 1

[0016] Specific embodiment one: the preparation method of a kind of Ti / MCM-41 molecular sieve with catalytic oxidation activity of the present embodiment is carried out according to the following steps:

[0017] 1. Put the MCM-41 molecular sieve in a muffle furnace, and calcinate at a temperature of 450°C to 600°C for 3h to 5h to obtain the pretreated MCM-41 molecular sieve;

[0018] 2. Disperse the organic titanium source evenly in ethanol, then add the pretreated MCM-41 molecular sieve obtained in step 1, stir for 5min to 10min, and then ultrasonically treat for 10min to 30min at an ultrasonic frequency of 28kHz to 40kHz, then Add deionized water drop by drop, stir at room temperature for 1.5h to 2.5h, then age for 10h to 14h, then put it in an oil bath at a temperature of 35 to 45°C and stir until the water and ethanol are completely volatilized, and then at a temperature of 90 Dry at ~110°C for 3h to 5h to obtain a white solid; the ratio of the mass of the organic titanium...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment differs from Embodiment 1 in that: in step 1, the pretreated MCM-41 molecular sieve is obtained by calcining for 4 hours at a temperature of 500° C. to 550° C. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the organic titanium source described in step 2 is tetrabutyl titanate, tetraethyl titanate or titanium isopropoxide. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

A preparation method and application of a Ti/MCM-41 molecular sieve with catalytic oxidation activity. The invention designs a preparation method and application of a Ti/MCM-41 molecular sieve. The invention aims to solve the problem of low catalytic oxidation desulfurization efficiency of the Ti/MCM-41 molecular sieve prepared by the existing method. Method: 1. Put MCM-41 molecular sieve in a muffle furnace for pretreatment; 2. Disperse organic titanium source evenly in ethanol, then add MCM-41 molecular sieve, perform ultrasonic treatment, then age at room temperature, and then put Stir in an oil bath until water and ethanol are completely volatilized, and finally dry to obtain a white solid; 3. Put the white solid obtained in step 2 in a muffle furnace for calcination to obtain Ti/MCM-41 molecular sieve. The Ti/MCM-41 molecular sieve of the present invention has an excellent catalytic oxidation desulfurization reaction effect at room temperature, and the conversion rate of dibenzothiophene reaches over 97% after the reaction at room temperature for ten minutes.

Description

technical field [0001] The invention designs a preparation method and application of a Ti / MCM-41 molecular sieve. Background technique [0002] Since Mobil Corporation of the United States first reported the mesoporous material M41S series molecular sieves in 1992, research reports on MCM-41 at home and abroad have appeared continuously. MCM-41 molecular sieve is a new kind of solid acid catalytic material with wide application prospects. It has a one-dimensional linear channel with a hexagonal prism structure, good hydrothermal stability, and its pore size can be adjusted between 2-8nm. 700m 2 / g, that is, the molecular sieve has the characteristics of narrow pore size distribution, large specific surface area and large adsorption capacity, and is widely used in the fields of heterogeneous catalysis, adsorption and separation. However, due to the lack of lattice defects in the framework of MCM-41 molecular sieve, its catalytic activity is not high, especially its applicat...

Claims

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Application Information

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IPC IPC(8): B01J29/03C10G27/00
CPCB01J29/0308B01J2229/183C10G27/00C10G2300/1081C10G2300/202C10G2300/70
Inventor 孙印勇鲁荣
Owner HARBIN INST OF TECH
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