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

A kind of preparation method of ZSM-5 molecular sieve with high silicon-aluminum ratio

A high-silicon-aluminum ratio, ZSM-5 technology, applied in the direction of crystalline aluminosilicate zeolite, borocarbane silicone crystalline aluminosilicate zeolite, etc., can solve the problems of difficult synthesis, large amount of template agent and environmental pollution, etc. Achieve the effects of stable product performance, continuous gas phase ultra-stable reaction, and low labor intensity

Active Publication Date: 2017-07-25
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a method for the problems in the preparation of high silicon-aluminum ratio ZSM-5 molecular sieves, such as the difficulty in synthesis and the pollution of the environment caused by the large amount of template agent used, as well as the problems existing in the existing continuous gas phase ultra-stable modification process. Method for preparing ZSM-5 molecular sieve with high silicon-aluminum ratio by continuous gas-phase dealumination and silicon supplementation suitable for industrial production

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 preparation method of ZSM-5 molecular sieve with high silicon-aluminum ratio
  • A kind of preparation method of ZSM-5 molecular sieve with high silicon-aluminum ratio
  • A kind of preparation method of ZSM-5 molecular sieve with high silicon-aluminum ratio

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The method for preparing the ZSM-5 molecular sieve with high silicon-aluminum ratio provided by the present invention is to continuously introduce NaZSM-5 molecular sieve into the gas-phase superstable reactor, so that the NaZSM-5 molecular sieve can generally be transported from the molecular sieve without carrier gas The inlet continuously moves to the outlet of the molecular sieve, and contacts with silicon tetrachloride gas in the gas phase ultrastable reactor for ultrastable reaction. Simultaneously, silicon tetrachloride was continuously introduced into the reactor.

[0026] In the method for preparing the ZSM-5 molecular sieve with high silicon-aluminum ratio provided by the invention, silicon tetrachloride can be introduced in the reactor with liquid phase and then vaporized in the reactor and reacted with NaZSM-5 molecular sieve, but in order to make the reaction uniform, Preferably silicon tetrachloride is vaporized and introduced into the gas phase ultrastabl...

Embodiment 1

[0062] Made of industrial grade stainless steel with a thickness of 3mm NiCr18Ti figure 2 In the molecular sieve gas-phase silicon replenishment equipment shown, the upper part of the gas-solid separator 2 is cylindrical with a diameter of 6 meters and a height of 14 meters, and the lower part is conical with an opening with a cone angle of 45°, and a valve is provided at the opening , the outlet is located at a position 1 meter away from the top of the gas-solid separator, and the absorption tower 3 is filled with an aqueous sodium hydroxide solution with a concentration of 10 mol / liter. The absorption tower 3 and the gas-solid separator 2 are connected by a conduit, and the conduit goes deep into the Sodium hydroxide aqueous solution.

[0063] Reactor 1 is a tubular reactor, such as Figure 5As shown, the total length of the pipe body is 80 meters, and the diameter of the pipe body is 0.8 meters. The pipe body of the reactor is made into a ring. The reactor includes an upp...

Embodiment 2

[0066] Made of industrial grade stainless steel with a thickness of 3mm NiCr18Ti figure 2 In the molecular sieve gas-phase silicon replenishment equipment shown, the upper part of the gas-solid separator 2 is cylindrical with a diameter of 6 meters and a height of 14 meters, and the lower part is conical with an opening with a cone angle of 45°, and a valve is provided at the opening , the outlet is located at a position 1 meter away from the top of the gas-solid separator, and the absorption tower 3 is filled with an aqueous sodium hydroxide solution with a concentration of 10 mol / liter. The absorption tower 3 and the gas-solid separator 2 are connected by a conduit, and the conduit goes deep into the Sodium hydroxide aqueous solution.

[0067] The length of the tubular reactor 1 is 60 meters, which is a straight tube, the angle between the axis of the tubular reactor and the horizontal plane is 45°, and the diameter (inner diameter) of the tubular reactor is 1 meter, such a...

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
widthaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing a ZSM-5 molecular sieve with a high silica-alumina ratio. The method comprises: introducing NaZSM-5 molecular sieve raw powder into a gas phase ultrastable reactor, driving the NaZSM-5 molecular sieve raw powder to move from the molecular sieve inlet of the gas phase ultrastable reactor to the molecular sieve outlet of the gas phase ultrastable reactor in the case of no carrier gas transport, and carrying out a haptoreaction on the NaZSM-5 molecular sieve raw powder and gas phase SiCl4 in the gas phase ultrastable reactor. The preparation method can be used for continuously preparing the ZSM-5 molecular sieve with high silica-alumina ratio.

Description

technical field [0001] The present invention relates to a preparation method of ZSM-5 molecular sieve, and more particularly relates to a method for preparing ZSM-5 molecular sieve with high silicon-aluminum ratio by using gas-phase chemical method to extract aluminum and supplement silicon. Background technique [0002] ZSM-5 molecular sieve is a high-silicon three-dimensional straight channel zeolite developed by Mobil in the 1970s. The unit cell composition of ZSM-5 can be expressed as: {Na n+ (H 2 O) 16 [Al n Si 96-n o 192 ], n<27}, the ratio of silicon to aluminum can be changed in a large range, from silicon-rich to all-silicon. The basic structural unit of ZSM-5 molecular sieve is composed of 8 five-membered rings, which are connected into a chain structure through common edges, and then surrounded by a zeolite framework structure. The skeleton of ZSM-5 molecular sieve contains two kinds of intersecting channels, one is a ten-membered ring straight channel wi...

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): C01B39/38
CPCC01B39/38
Inventor 刘子阳周灵萍张杰潇张蔚琳许明德田辉平朱玉霞
Owner CHINA PETROLEUM & CHEM CORP
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