Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of hierarchical porous eu-1 molecular sieve and preparation method thereof

A technology of EU-1 and molecular sieve, which is applied in molecular sieve catalysts, molecular sieves and base exchange compounds, chemical instruments and methods, etc., can solve problems such as low molecular diffusion efficiency, fast catalytic reaction deactivation speed, poor hydrothermal stability, etc. , to achieve the effect of retaining micropore volume, slowing down the rate of silicon dissolution, and increasing mesopore volume

Active Publication Date: 2020-02-14
CHINA CATALYST HLDG CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low molecular diffusion efficiency of reactants and poor hydrothermal stability on EU-1 molecular sieve, resulting in fast deactivation of catalytic reaction, and to provide a preparation method of multi-stage porous EU-1 molecular sieve material

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of hierarchical porous eu-1 molecular sieve and preparation method thereof
  • A kind of hierarchical porous eu-1 molecular sieve and preparation method thereof
  • A kind of hierarchical porous eu-1 molecular sieve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The EU-1 molecular sieve in Comparative Example 1 was used as the original powder, and the original powder was placed in a mixed alkaline solution formed by 0.08mol / L NaOH and piperazine, and treated with alkali at room temperature for 10 minutes, and the solid-liquid mass ratio was 1:20. SiO in Piperazine and EU-1 Molecular Sieve Raw Powder 2 The molar ratio is 0.02:1. Then add 0.4mol / L citric acid to the system to adjust the pH to neutral, filter out the solid, wash the solid with deionized water until it is neutral, and then dry it at 120°C for 12 hours; the dried solid is then placed in a 0.5mol / L The citric acid solution was refluxed at 120°C for 10 hours, and the solid-to-liquid mass ratio was 1:10; then the solid product was filtered out, and the solid product was deionized and washed to neutrality, and then dried at 120°C for 12 hours to obtain hierarchically porous EU -1 molecular sieve. figure 2 Explain that the obtained product is an EUO topological struct...

Embodiment 2-8

[0035] The preparation method of Examples 2-8 is basically the same as that of Example 1, the type of inorganic lye used, the type of piperidine compounds, the treatment time of molecular sieves in lye, the type of acid, the acid concentration, the mass ratio of solid to acid solution, and the reflux Each parameter such as temperature and time is different, as shown in table 1 and table 2; Nitrogen physical adsorption result shows, the sample that embodiment 1-8 obtains all contains mesopore structure, mesopore diameter distribution, average pore diameter and mesopore The pore volume is shown in Table 3:

[0036] Table 1

[0037]

[0038] Table 2

[0039]

[0040] *: product solid yield% = multi-level porous EU-1 molecular sieve product mass / initial EU-1 molecular sieve mass × 100%

[0041] table 3

[0042]

[0043]

[0044] It can be seen from Table 3 that the molecular sieves synthesized in the examples of the present invention have mesoporous structures of ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
crystallinityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a multi-stage porous EU-1 molecular sieve and a preparation method thereof. The original EU-1 molecular sieve powder with a silicon oxide / alumina molar ratio of 20 to 200 is placed in a mixed base of an inorganic base and a piperazine-type organic base compound. In a neutral solution, treat it at room temperature with a solid / liquid mass ratio of 1: (10 to 50) for 10 to 60 minutes, then add acid to adjust the pH value to neutral. After filtering, washing, and drying, the sample and concentration are 0.01 to 0.5 mol. / L acid solution according to the mass ratio of 1: (10~50), reflux treatment at 80~120℃ for 0.5~12h, and then filtered, washed and dried to obtain multi-stage pore EU-1 molecular sieve. The multi-stage porous EU-1 molecular sieve provided by the present invention has good diffusion performance of reaction molecules and has good application prospects as a catalyst carrier.

Description

technical field [0001] The invention relates to a multi-stage porous EU-1 molecular sieve and a preparation method thereof, is a post-treatment method of the EU-1 molecular sieve, and belongs to the field of inorganic material synthesis. Background technique [0002] In the crystal structure of the EUO topological structure molecular sieve, there is a one-dimensional ten-membered ring 0.54nm×0.41nm channel in the [100] direction, and there are 0.81nm deep twelve-membered ring 0.68nm×0.58nm side pockets on both sides of the ten-membered ring channel. . EU-1, ZSM-50 and TPZ-3 molecular sieves all have EUO topology, among which EU-1 molecular sieve is a molecular sieve that has been widely studied in recent years. The bifunctional catalyst prepared by the acidic component of the structure catalyst shows good activity and selectivity in the catalytic reaction of C8 aromatics hydroisomerization and benzene isopropylation, and is known as a new generation of xylene isomerization ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/46B01J29/70B01J35/10
CPCC01B39/46B01J29/7023C01P2004/03C01P2002/72C01P2006/16C01P2006/14C01P2006/12B01J35/615B01J35/635B01J35/647
Inventor 王志光王建青王炳春李进
Owner CHINA CATALYST HLDG CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com