Molecular sieve catalyst containing mesoporous ZSM-5 and preparation method and application of molecular sieve catalyst

A technology of ZSM-5 and molecular sieve, which is applied to molecular sieve catalysts, chemical instruments and methods, and the production of hydrocarbons from oxygen-containing organic compounds, etc., can solve problems such as unfavorable industrial production and damage to the micropore structure of catalysts, and achieve broad industrialization prospects. Agglomeration-promoting and low-cost effects

Inactive Publication Date: 2014-01-01
FUDAN UNIV
View PDF10 Cites 42 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, although the existing pore-making technologies have good activity, some will destroy

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
  • Molecular sieve catalyst containing mesoporous ZSM-5 and preparation method and application of molecular sieve catalyst
  • Molecular sieve catalyst containing mesoporous ZSM-5 and preparation method and application of molecular sieve catalyst
  • Molecular sieve catalyst containing mesoporous ZSM-5 and preparation method and application of molecular sieve catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] MZ5-1 catalyst is prepared as follows:

[0034] a) Take sodium silicate as the silicon source and tetrapropylammonium bromide as the templating agent, mix them with a certain proportion of deionized water, and heat them ultrasonically until they are dissolved. The ultrasonic temperature is 35°C to obtain liquid a. As the aluminum source and potassium fluoride as potassium salt, dissolve in a certain proportion of deionized water, stir and dissolve at room temperature to form liquid b, and slowly drop liquid b into liquid a under the action of ultrasound to obtain a mixed system. The molar ratio of each component in the mixed system is: , SiO 2 :Al 2 o 3 : Templating agent: KF: H 2 O = 1:0.0025:0.3:0.1:30;

[0035] b) Ultrasonic dissolution is carried out when the mixture is heated to 40°C, the ultrasonic frequency is 40KHZ, the ultrasonic power is 100W,

[0036] After ultrasonication for 10 minutes, transfer to mechanical stirring, control the ambient temperature a...

Embodiment 2

[0044] MZ5-2 catalyst is prepared as follows:

[0045] The ultrasonic time in Example 1 was extended to 20min, and the rest of the synthesis steps were the same as in Example 1.

[0046] Put 0.5g, 40~60mesh MZ5-2 catalyst into a quartz reaction tube with a diameter of 9mm, the raw material is 20~50%wt methanol water, and the mass space velocity (relative to pure methanol) is 4.0 h -1 , the reaction temperature is 300~500°C.

Embodiment 3

[0048] MZ5-3 catalyst is prepared as follows:

[0049] The ultrasonic time in Example 1 was extended to 30min, and the rest of the synthesis steps were the same as in Example 1.

[0050] Put 0.5g, 40~60mesh MZ5-3 catalyst into a quartz reaction tube with a diameter of 9mm, the raw material is 20~50%wt methanol water, and the mass space velocity (relative to pure methanol) is 4.0 h -1 , the reaction temperature is 300~500°C.

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

No PUM Login to view more

Abstract

The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a molecular sieve catalyst containing mesoporous ZSM-5 and a preparation method and application of the molecular sieve catalyst. According to the invention, cheap silicon-aluminium source, a kali salt, an organic template agent are all dissolved in water; the system is subject to heating and ultrasound-assisted mechanical mixing through cavitation effect of the ultrasound; the salting-out effect of the kali salt is adopted to generate structure-directing effect; finally, the ZSM-5, which contains mesoporous, has a high silicon-aluminium ratio, and has an MFI structural character, is synthesized through hydrothermal method. The mesoporous catalyst prepared by the invention has an efficient catalytic activity and stability when used for preparing propene from methanol, and has a service life longer than 1100 h at a high space velocity (WSHV=2.0<-1>); the service life, in a reinforced experiment, wherein the space velocity is increased by one time, can be longer than 600 h.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a mesoporous ZSM-5 zeolite catalyst, a preparation method thereof, and an application in the methanol-to-propylene reaction. Background technique [0002] Propylene is one of the important basic raw materials in petrochemical industry, and is widely used in the production of high value-added downstream products such as polypropylene, acrylonitrile, and acrylic acid. In recent years, due to the rapid increase in demand for propylene derivatives, the supply and demand of propylene as a by-product of ethylene in the traditional process is very tense. At the same time, today's petroleum resources as raw materials are increasingly scarce, and it is urgent to develop new technology to solve the energy crisis. . Based on my country's rich coal and low oil resources, the methanol-to-propylene technology (MTP) using coal and natural gas as raw mater...

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
IPC IPC(8): B01J29/40C07C11/06C07C1/20
CPCY02P20/52
Inventor 沈伟胡志洁徐华龙秦枫黄镇周海波胡佩雷张林
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap