Fluorinated silicon-aluminum molecular sieve as well as preparation method and application thereof

A silica-alumina molecular sieve and molecular sieve technology, applied in the direction of molecular sieve catalysts, preparation of heterocyclic compounds, chemical instruments and methods, etc., to achieve the effects of strong stability, convenient operation, and high catalytic efficiency

Active Publication Date: 2020-04-17
TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially molecular sieves such as ZSM-5 and Y molecular sieves have been widely used in cracking, isomerization, alkylation, aromatization and other reactions, but fluorinated molecular sieves are rarely reported.

Method used

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  • Fluorinated silicon-aluminum molecular sieve as well as preparation method and application thereof
  • Fluorinated silicon-aluminum molecular sieve as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Dry ZSM-5 molecular sieve (silicon-aluminum ratio of 10) in an oven at 120°C for 4 hours, take 10g and put it into a tube furnace, feed N2 to raise the temperature to 350°C, and change to CHClF 2 (R22) gas, the flow rate is 30ml / min, fluoride for 4 hours, change the temperature to room temperature with N2. Tablets take 20-40 mesh, which is Catalyst A.

Embodiment 2

[0017] Example 2: The specific steps are the same as those in Example 1, except that the silicon-aluminum ratio of ZSM-5 molecular sieve is 50. This is Catalyst B.

Embodiment 3

[0018] Embodiment three: the specific steps are the same as the preparation steps in embodiment one, except that the molecular sieve selected is Y type. This is Catalyst C.

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PUM

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Abstract

The invention belongs to the field of catalyst preparation, and particularly relates to a fluorinated silicon-aluminum molecular sieve as well as a preparation method and an application thereof. The preparation method of the fluorinated silicon-aluminum molecular sieve comprises the following steps: drying a molecular sieve in an oven, putting the molecular sieve into a tubular furnace, introducing N2, heating to 200-500 DEG C, introducing CHClF2 gas for fluorination, introducing N2 after fluorination, and cooling to room temperature; and tabletting and molding to obtain 20-40 meshes. The fluorinated gas is introduced into a tubular furnace through CHClF2 (R22) and reacts with the molecular sieve to form the fluorinated silicon-aluminum molecular sieve, operation is convenient, and the obtained silicon-aluminum molecular sieve serving as a catalyst for preparing hexafluoroacetone is high in catalytic efficiency, high in selectivity and high in stability.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a fluorinated silica-alumina molecular sieve and its preparation method and application. Background technique [0002] Since the advent of molecular sieves, due to their rich microporous structure, good hydrothermal stability and strong acidity, they have been widely used in catalytic fields such as petroleum processing, coal chemical industry, environmental protection and fine chemical industry as catalytic and adsorption separation materials. Especially molecular sieves such as ZSM-5 and Y molecular sieves have been widely used in cracking, isomerization, alkylation, aromatization and other reactions, but fluorinated molecular sieves are rarely reported. Contents of the invention [0003] The object of the present invention is to provide a fluorinated silica-alumina molecular sieve and its preparation method and application. [0004] In order to achieve the ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/38C01B39/24B01J29/06B01J37/08B01J37/26C07C45/58C07C49/167
CPCC01B39/38C01B39/24B01J29/06B01J37/08B01J37/26C07C45/58B01J2229/183C07C49/167
Inventor 陈爽姚素梅
Owner TIANJIN CHANGLU CHEM NEW MATERIAL CO LTD
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