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Preparation of Three-dimensional Ordered Hierarchical Molecular Sieve Catalysts by Microjet Free Forming System

A three-dimensional ordered, molecular sieve technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve the effect of large pore volume, low cost, and high specific surface area

Inactive Publication Date: 2015-09-09
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZSM-5 molecular sieves with macropores, mesoporous and microporous hierarchical pore structures have not been reported yet.

Method used

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  • Preparation of Three-dimensional Ordered Hierarchical Molecular Sieve Catalysts by Microjet Free Forming System
  • Preparation of Three-dimensional Ordered Hierarchical Molecular Sieve Catalysts by Microjet Free Forming System
  • Preparation of Three-dimensional Ordered Hierarchical Molecular Sieve Catalysts by Microjet Free Forming System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Make the three-dimensional shape of the catalyst: design the structure of the catalyst according to the fixed-bed reaction device, and use Magics three-dimensional software to draw the three-dimensional shape of the catalyst on the computer;

[0020] (2) 90g of ZSM-5 molecular sieve (SiO 2 :Al 2 o 3 Molar ratio = 50) with 10g pseudo-boehmite and coagulant 0.5molHNO 3 (5mol / L) mix evenly, stir until paste;

[0021] (3) Quickly add the mixture into the spray chamber of the micro-jet free forming system, and at the same time seal it tightly. Controlled by software, the aperture is designed to be 0.02mm, and the stacking method is a cross. Click the start button to start the processing of the parts, and finally get such as figure 1 Catalysts shown.

[0022] The obtained catalyst material includes micropores with a size of 0.2-2nm, mesopores with a size distribution of 2-30nm, and macropores with a size of 0.02mm, and the stacking angle between layers of ordered ma...

Embodiment 2

[0024] (1) Make the three-dimensional modeling of the catalyst: design the structure of the catalyst according to the fixed-bed reaction device, and use Magics three-dimensional software to draw the three-dimensional modeling of the catalyst on the computer.

[0025] (2) 90g of ZSM-5 molecular sieve (SiO 2 :Al 2 o 3 =100), with 10g pseudoboehmite and coagulant 15ml150g / L HNO 3 Mix well, stirring until smooth.

[0026] (3) Quickly add the mixture into the spray chamber of the micro-jet free forming system, and at the same time seal it tightly. Controlled by software, the aperture is designed to be 0.5mm, and the stacking method is a cross. Click the start button to start the processing of parts, and finally get a three-dimensional ordered multi-level porous molecular sieve catalyst.

[0027] The obtained catalyst material includes micropores with a size of 0.2-2nm, mesopores with a size distribution of 2-30nm, and macropores with a size of 0.5mm, and the stacking angle bet...

Embodiment 3

[0029] (1) Make the three-dimensional modeling of the catalyst: design the structure of the catalyst according to the fixed-bed reaction device, and use Magics three-dimensional software to draw the three-dimensional modeling of the catalyst on the computer.

[0030] (2) The synthesized ZSM-5 molecular sieve (SiO 2 :Al 2 o 3 =200), and Al 2 o 3 The powder is 9:1 in mass ratio, mixed evenly under the action of coagulant polyvinyl alcohol, and stirred until it becomes a paste. Do you want to add water?

[0031] (3) Quickly add the mixture into the spray chamber of the micro-jet free forming system, and at the same time seal it tightly. Controlled by software, the aperture is designed to be 0.03mm, and the stacking method is cross. Click the start button to start the processing of parts, and finally get a three-dimensional ordered multi-level porous molecular sieve catalyst.

[0032] The obtained catalyst material includes micropores with a size of 0.2-2nm, mesopores with ...

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Abstract

The invention discloses a method for preparing a three-dimensional ordered hierarchical pore molecular sieve catalyst by a micro injecting free forming system. The method comprises: firstly, a molecular sieve which has ordered mesopores is prepared, and at last, different macropore structures are designed by adopting computer software, and the three-dimensional ordered macropore-mespore-micropore hierarchical pore ZSM-5 molecular sieve is prepared by the micro injecting free forming system. The prepared three-dimensional ordered macropore-mespore-micropore hierarchical pore ZSM-5 molecular sieve has micropores, the ordered mespores and ordered macropores, the micropores are between 0.2nm and 2nm, the ordered mespores are between 2nm and 30nm, the ordered macropores are between 0.02mm and 0.5mm, the molecular sieve has large specific surface area and important application prospects in the aspects of separating and catalyzing of petrochemical engineering.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic non-metallic materials and catalysts, and is a method for preparing three-dimensional ordered macropore-mesopore-micropore ZSM-5. Background technique [0002] In the petrochemical industry, ethylbenzene is an important chemical product. Ethylbenzene is mainly used to produce styrene and other resins and intermediates of plastics, and the obtained styrene is copolymerized with butadiene and acrylonitrile for the production of ABS engineering plastics. In addition, ethylbenzene, as a basic raw material, can be used to produce intermediates such as acetophenone and methyl phenyl in the organic synthesis industry, and can be used as an intermediate in the production of chloramphenicol in medicine. In recent years, the demand for ethylbenzene has grown rapidly. From 1998 to 2015, it will grow at an average annual rate of 3.7%, and domestically at a rate of 5.3%, and the total volume will incr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40C01B39/38C07C15/073C07C2/88
Inventor 郭亚平郭亚军陈婷褚联峰
Owner SHANGHAI NORMAL UNIVERSITY