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

A kind of hierarchical hole eu-1 molecular sieve and its synthesis method

A synthesis method, EU-1 technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of poor hydrothermal stability, fast catalytic reaction deactivation, molecular problems such as low diffusion efficiency, to achieve the effect of retaining the volume of micropores, increasing the volume of mesopores, and improving the solid yield

Active Publication Date: 2020-02-14
CHINA CATALYST HLDG CO LTD
View PDF6 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 hole eu-1 molecular sieve and its synthesis method
  • A kind of hierarchical hole eu-1 molecular sieve and its synthesis method
  • A kind of hierarchical hole eu-1 molecular sieve and its synthesis method

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 pyrrole, and treated with alkali at room temperature for 10 minutes, the solid-liquid mass ratio was 1:20, and the pyrrole SiO with EU-1 molecular sieve raw powder 2 The molar ratio is 0.02:1. Then add 0.4mol / L formic acid to the system to adjust the pH to neutral, filter out the solid, wash the solid with deionized water until 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 10h, 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 12h to obtain a hierarchically porous EU-1 molecular sieve. figure 2 Explain that the obtained product is an EUO topological structure phase, Figure...

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 hierarchical pore EU-1 molecular sieve and a synthetic method thereof. The synthetic method comprises the following steps: placing EU-1 molecular sieve raw powder of which amole ratio of silicon oxide to aluminum oxide is 20-200 in a mixed alkaline solution of inorganic base and pyrroles organic alkali compounds, in a room temperature, and according to a solid / liquid mass ratio of 1:(10-50), treating for 10-60 min, adding acid to adjust a pH value to be neutral, filtering, washing, and drying, according to a mass ratio of 1:(10-50), performing refluxing treatment for0.5-12 h on a sample and an acid solution of which the concentration is 0.01-0.5 mol / L at 80-120 DEG C, and filtering, washing and drying, to obtain the hierarchical pore EU-1 molecular sieve. The provided hierarchical pore EU-1 molecular sieve has good reaction molecular diffusion ability, and has good application prospect as a catalyst carrier.

Description

technical field [0001] The invention relates to a multi-stage porous EU-1 molecular sieve and a synthesis 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 p...

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): C01B39/02C01B39/46B82Y40/00
CPCB82Y40/00C01B39/026C01B39/46C01P2002/72C01P2004/03C01P2006/12C01P2006/14C01P2006/16
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