Supercharge Your Innovation With Domain-Expert AI Agents!

Preparation method of mesoporous y molecular sieve

A molecular sieve and mesoporous technology, applied in the field of preparation of mesoporous Y molecular sieves, can solve the problems of low sample solid yield, poor internal mesopore order, and low crystallinity.

Active Publication Date: 2021-11-30
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the mesoporous Y molecular sieve prepared by the prior art has problems such as poor internal mesoporous order, low sample solid yield and low crystallinity.

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
  • Preparation method of mesoporous y molecular sieve
  • Preparation method of mesoporous y molecular sieve
  • Preparation method of mesoporous y molecular sieve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] With 10 grams of Y molecular sieves and 0.472 grams of ordered mesoporous directing agent (wherein R 2 , R 3 , R 4 is hydrogen; R 1 and R 5 For methyl) mixed uniformly to obtain mixed solution A, after stirring at 30°C for 15 minutes, add 100 grams of 0.2M sodium hydroxide solution to mixed solution A to obtain mixed solution C, mixed solution C was centrifuged and washed at 25°C for 120 minutes, After drying, the mesoporous Y molecular sieve is obtained. Wherein, the molar ratio of the ordered mesoporous directing agent to the Y molecular sieve is 0.025:1, and the mass ratio of the sodium hydroxide solution to the Y molecular sieve is 10:1. The XRD spectrum pattern of gained mesoporous Y molecular sieve is as follows figure 1 As shown, there is a strong diffraction peak attributed to the MFI topology. Nitrogen adsorption and desorption isotherms figure 2 As shown, it is a mixed nitrogen adsorption curve of type I and type IV, and it is multi-layer adsorption in...

Embodiment 2

[0035] 10 grams of Y molecular sieve and 4.24 grams of ordered mesoporous directing agent (wherein R 1 , R 3 , R 5 is hydrogen; R 2 is ethyl, R 4 For methyl) mixed uniformly to obtain mixed solution A, after stirring at 80°C for 95 minutes, add 400 grams of 0.5M sodium hydroxide solution to mixed solution A to obtain mixed solution C, mixed solution C was centrifuged and washed at 25°C for 15 minutes, After drying, the mesoporous Y molecular sieve is obtained. Wherein, the molar ratio of the ordered mesoporous directing agent to the Y molecular sieve is 0.2:1, and the mass ratio of the sodium hydroxide solution to the Y molecular sieve is 40:1. The XRD spectrum pattern of gained mesoporous Y molecular sieve is as follows figure 1 As shown, there is a strong diffraction peak attributed to the MFI topology. Nitrogen adsorption and desorption isotherms figure 2 As shown, it is a mixed nitrogen adsorption curve of type I and type IV, and it is multi-layer adsorption in the...

Embodiment 3

[0037] 10 grams of Y molecular sieve and 1.177 grams of ordered mesoporous directing agent (wherein R 1 , R 3 , R 5 is hydrogen; R 2 is ethyl, R 4 Ethyl) was mixed uniformly to obtain a mixed solution A, after stirring at 50°C for 65 minutes, 300 grams of 0.3M sodium hydroxide solution was added to the mixed solution A to obtain a mixed solution C, and the mixed solution C was stirred at 60°C for 40 minutes and then centrifuged and washed. After drying, the mesoporous Y molecular sieve is obtained. Wherein, the molar ratio of the ordered mesoporous directing agent to the Y molecular sieve is 0.05:1, and the mass ratio of the sodium hydroxide solution to the Y molecular sieve is 30:1. The XRD spectrum pattern of gained mesoporous Y molecular sieve is as follows figure 1 As shown, there is a strong diffraction peak attributed to the MFI topology. Nitrogen adsorption and desorption isotherms figure 2 As shown, it is a mixed nitrogen adsorption curve of type I and type IV,...

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 relates to a preparation method of the mesoporous Y molecular sieve, which mainly solves the problems of low mesoporous order degree, low sample solid yield and low crystallinity in the preparation of the mesoporous Y molecular sieve by the existing alkali treatment method. The present invention preferably solves this problem by adopting the scheme of pre-contacting the Y molecular sieve with the ordered mesoporous directing agent solution and then alkali treatment, so as to improve the internal mesopore order degree of the mesoporous Y molecular sieve, improve the solid yield of the sample and The purpose of crystallinity.

Description

technical field [0001] The invention belongs to the technical field of catalytic chemistry and chemical engineering, and in particular relates to a preparation method of a mesoporous Y molecular sieve. Background technique [0002] There is a cavity with an inner diameter of about 1.3 nm in the Y molecular sieve structure, which is called a supercage (α cage). The cavity of the supercage communicates with the outside world through a twelve-membered ring, and the pore size is about 0.78nm. It is precisely because of such a large pore size that various organic molecules can enter the supercage structure, and then in the supercage react in. [0003] Y molecular sieve has regular and ordered micropore channels and efficient acidic catalytic active centers. These unique properties make Y molecular sieves widely used in petrochemical production processes, such as catalytic cracking, hydrocarbon hydrocracking, alkylation and transalkylation reactions. However, when molecules who...

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): C01B39/20B01J29/08
CPCB01J29/084C01B39/205
Inventor 王达锐孙洪敏杨为民张斌王振东周辉
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com