Preparation method of boron oxide-modified microporous molecular sieve shape-selective catalyst

The technology of microporous molecular sieve and catalyst is applied in the field of preparation of boron oxide modified microporous molecular sieve shape-selective catalyst, can solve the problems of complicated preparation operation and high cost of shape-selective catalyst, and achieves improved shape-selective performance, low cost, and shape-selective effect. high performance effects

Inactive Publication Date: 2014-10-08
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a shape-selective catalyst with simple synthesis method, low cost and high shape-selective perfo

Method used

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  • Preparation method of boron oxide-modified microporous molecular sieve shape-selective catalyst

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Experimental program
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Effect test

Embodiment 1

[0017] Add ammonium pentaborate to deionized water, wherein the mass ratio of ammonium pentaborate to deionized water is 1:5, stir until completely dissolved; then add microporous molecular sieve ZSM-5 to the above solution, in which ammonium pentaborate and microporous The mass ratio of molecular sieve ZSM-5 was 1:2, stirred evenly, and stood at room temperature for 12 hours; the obtained material was evaporated to dryness in a water bath, then put into a 120°C oven to dry for 6 hours, and then transferred to a muffle furnace, in the air In the atmosphere, the temperature was raised to 550°C at a rate of 10°C / min, and kept at this temperature for 4 hours, and then lowered to room temperature to obtain a boron oxide-modified microporous molecular sieve shape-selective catalyst, denoted as Cat1.

Embodiment 2

[0019] Add ammonium pentaborate to deionized water, wherein the mass ratio of ammonium pentaborate to deionized water is 1:10, stir until completely dissolved; then add microporous molecular sieve ZSM-5 to the above solution, in which ammonium pentaborate and microporous The mass ratio of molecular sieve ZSM-5 was 1:2, stirred evenly, and stood at room temperature for 12 hours; the obtained material was evaporated to dryness in a water bath, then put into a 120°C oven to dry for 6 hours, and then transferred to a muffle furnace, in the air In the atmosphere, the temperature was raised to 550°C at a rate of 10°C / min, and kept at this temperature for 4 hours, and then lowered to room temperature to obtain a boria-modified microporous molecular sieve shape-selective catalyst, denoted as Cat2.

Embodiment 3

[0021] Add ammonium pentaborate to deionized water, wherein the mass ratio of ammonium pentaborate to deionized water is 1:5, stir until completely dissolved; then add microporous molecular sieve ZSM-5 to the above solution, in which ammonium pentaborate and microporous The mass ratio of molecular sieve ZSM-5 was 1:8, stirred evenly, and stood at room temperature for 12 hours; the obtained material was evaporated to dryness in a water bath, then put into a 120°C oven to dry for 6 hours, and then transferred to a muffle furnace. In the atmosphere, the temperature was raised to 550°C at a rate of 10°C / min, and kept at this temperature for 4 hours, and then lowered to room temperature to obtain a boron oxide-modified microporous molecular sieve shape-selective catalyst, denoted as Cat3.

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Abstract

The invention relates to a preparation method of a boron oxide-modified microporous molecular sieve shape-selective catalyst. The preparation method comprises the following step of with a microporous molecular sieve ZSM-5 or MCM-22 as a supporter and ammonium pentaborate as a precursor of boron oxide, supporting boron oxide on the outer surface of the microporous molecular sieve by virtue of dipping and temperature programming roasting methods, wherein the mass ratio of ammonium pentaborate to the microporous molecular sieve is (1:2)-(1:8). The catalyst prepared by virtue of the preparation method has good shape selective catalysis performance in processes of compounding p-cresol and paraethyl phenol by virtue of para-phenol alkylation.

Description

technical field [0001] The invention relates to the field of preparation of solid inorganic composite materials, in particular to a method for preparing a boron oxide-modified microporous molecular sieve shape-selective catalyst used in the para-alkylation of phenol to synthesize p-cresol and p-ethylphenol. Background technique [0002] p-Alkylphenols, such as p-cresol and p-ethylphenol, are important petrochemical products, and are widely used in the production of phenolic resins, rubber anti-aging agents, surfactants and other important fields, and are also important in the production of spices and pesticides intermediate. The synthesis methods of p-alkylphenol mainly include natural separation method, methylaniline diazotization hydrolysis method, methylbenzene chlorination hydrolysis method and phenol alkylation method. Among them, the first three methods have been gradually eliminated due to the complex process, serious corrosion in the production process and low produ...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/70C07C37/16C07C39/07C07C39/06
CPCY02P20/52
Inventor 薛冰何盼盼柳娜李永昕许杰
Owner CHANGZHOU UNIV
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