A method for directly preparing supported solid superacid catalyst by microwave method

A solid superacid and catalyst technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of complex preparation, long time, poor thermal stability, etc., and achieve hydrogenation conversion efficiency and Improved selectivity, stable effective components, and good thermal stability

Active Publication Date: 2016-04-20
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a method for directly preparing a loaded solid superacid catalyst by a microwave method, which solves the problem of complex preparation of the current superacid catalyst, long time, easy loss of active components of the catalyst, poor thermal stability, and especially no significant aromatic Catalytic hydrogenation of ring bridge bond, the problem of low catalytic efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the preparation method of supported solid superacid catalyst, operating conditions and performance index and catalytic effect of catalyst:

[0024] 1. Preparation of catalyst:

[0025] (1) NaHCO with a weight of 1g and a weight concentration of 1% 3 Fully mix and stir with carbon nanotubes with a weight of 500g, and place the mixed material in a microwave reactor with a power of 300W, and maintain the temperature heated by microwave radiation in a nitrogen flow at 220 ° C for 10 minutes to obtain a supported Na catalyst carrier.

[0026] (2) Place 100 g of the prepared Na catalyst carrier prepared above in a flask in a microwave reactor. Under 100W power microwave irradiation, the temperature heated by microwave radiation in a nitrogen flow is at 50°C, and add to the flask drop by drop. SbCl with a total weight of 200 g and a volume ratio of 1:2 5 and F 3 CSO 3 Si(CH 3 ) 3 After mixing the solution, the system was fully stirred, impregnated and main...

Embodiment 2

[0032] Embodiment 2: the preparation method of supported solid superacid catalyst, operating conditions and performance index and catalytic effect of catalyst:

[0033] 1. Preparation of catalyst:

[0034] (1) NaHCO with a weight of 1g and a weight concentration of 8‰ 3 Fully mix and stir with carbon nanotubes with a weight of 500g, and place the mixed material in a microwave reactor with a power of 300W, and maintain the temperature heated by microwave radiation in a nitrogen flow at 200 ° C for 20 minutes to obtain a supported Na catalyst carrier.

[0035] (2) Place 200g of the Na catalyst carrier prepared above in a flask in a microwave reactor, and add it dropwise to the flask under 100W power microwave irradiation and microwave radiation heating temperature in a nitrogen flow at 30°C. SbCl with a total weight of 500 g and a volume ratio of 1:4 5 and F 3 CSO 3 Si(CH 3 ) 3 After mixing the solution, the system was fully stirred, impregnated and maintained for 15 minu...

Embodiment 3

[0041] Embodiment 3: the preparation method of supported solid superacid catalyst, operating conditions and performance index and catalytic effect of catalyst:

[0042] 1. Preparation of catalyst:

[0043] (1) NaHCO with a weight of 1g and a weight concentration of 4‰ 3 Fully mix and stir with carbon nanotubes with a weight of 500g, and place the mixed material in a microwave reactor with a power of 300W, and maintain the temperature heated by microwave radiation in a nitrogen flow at 200 ° C for 20 minutes to obtain a supported Na catalyst carrier.

[0044] (2) Place 150g of the prepared Na-loaded catalyst carrier in the flask in the microwave reactor. Under 120W power microwave irradiation, the temperature heated by microwave radiation in a nitrogen stream is at 40°C, and add it dropwise to the flask. SbCl with a total weight of 600 g and a volume ratio of 1:1 5 and F 3 CSO 3 Si(CH 3 ) 3 Mix the solution, the system is fully stirred, impregnated and maintained for 20 ...

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Abstract

The invention relates to a method for preparing a loaded solid super acidic catalyst directly by a microwave method, and belongs to a method for preparing a super acidic catalyst. The method comprises the following steps of: (1) mixing and stirring NaHCO3 and a carbon nano tube in a weight ratio of 1:500 fully, and roasting in a microwave reactor to obtain a Na-loaded catalyst carrier; (2) heating the Na-loaded catalyst carrier by microwave radiation, adding a mixed solution of antimony pentachloride (SbCl5) and trimethylsilyl trifluoromethanesulfonate (F3CSO3Si(CH3)3) dropwise, stirring and immersing to obtain a suspension mixed solution; (3) filtering the suspension mixed solution to obtain a solid precursor and a mixed solution; (4) putting the solid precursor into the microwave reactor, heating by the microwave radiation, and roasting to obtain a solid super acidic catalyst prototype; and (5) performing operation for 1 to 5 times by taking the solid super acidic catalyst prototype as a raw material according to the steps (2), (3) and (4) to obtain the solid-loaded super acidic catalyst. The method has the advantages that: the loaded solid super acidic catalyst prepared by the microwave method is high in catalytic hydrocracking activity and selectivity.

Description

technical field [0001] The invention relates to a preparation method of a superacid catalyst, in particular to a method for directly preparing a loaded solid superacid catalyst by a microwave method. Background technique [0002] Acid-catalyzed reactions involve petroleum refining processes such as hydrocarbon cracking, reforming, and isomerization, as well as numerous petrochemical and fine chemical units such as olefin hydration, olefin polymerization, aromatic hydrocarbon alkylation, aromatic hydrocarbon acylation, and alkyd esterification. The reaction process, it can be said that acid catalyst is the basis of a series of important industries. [0003] At present, solid superacid catalysts mainly include the following categories, which are unit reactions utilizing isomerization reaction, alkylation reaction, esterification reaction, acylation reaction, oligomerization reaction, substitution reaction, acetal and ketal, Direct preparation of superacid catalysts. [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26B01J37/34C07C4/24C07C4/00C07C15/24C10G1/06
Inventor 魏贤勇宗志敏岳晓明王英华樊星赵云鹏孙兵卿宇王玉高李鹏陈博刘畅黄莉丽周俊路遥
Owner CHINA UNIV OF MINING & TECH
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