Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

ZSM-5/ZSM-23/Y zeolite triphase coexisting molecular sieve and method for synthesizing same

A symbiotic molecular sieve, ZSM-23 technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, crystalline aluminosilicate zeolites, etc., can solve the problems of low activity, single pore size of porous materials, weak acidity, etc. The effect of good catalytic performance and good technical effect

Active Publication Date: 2009-08-26
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is that the porous material synthesized by the prior art has a single pore size, weak acidity and low activity, and a new ZSM-5 / ZSM-23 / Y zeolite three-phase symbiotic molecular sieve is provided

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
  • ZSM-5/ZSM-23/Y zeolite triphase coexisting molecular sieve and method for synthesizing same
  • ZSM-5/ZSM-23/Y zeolite triphase coexisting molecular sieve and method for synthesizing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 1137 grams of sodium metasilicate and dissolve in 1800 grams of deionized water. In addition, 267 grams of aluminum sulfate was dissolved in 350 grams of deionized water, and added into the sodium silicate solution under stirring. After stirring evenly, adjust the pH value to 11 with 30% sulfuric acid solution, then continue to stir until uniform, and carry out conventional hydrothermal crystallization at 120° C. for 15 hours. After washing, the product was dried at 130°C for 4 hours and calcined at 550°C for 3 hours to obtain the Y zeolite seed crystal required by the present invention, which was designated as M1.

Embodiment 2

[0023] According to the method and content provided in Example 1, the amount of aluminum sulfate added was changed to 133.4 grams to obtain the Y zeolite seed crystal required by the present invention, which was denoted as M2.

Embodiment 3

[0025] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 16.7 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 12.2 grams of B Diamine and 14.2 grams of pyrrolidine (the mixed template agent is denoted as M), after stirring for a period of time, adjust the pH value at 11 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: M: H 2 O=1:0.05:0.4:40, add 3.0 g of Y zeolite seed crystal M1, put the mixed solution in an autoclave, keep it at 150°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, Roasting for 3 hours, the ZSM-5 / ZSM-23 / Y zeolite intergrowth material was obtained, and the XRD diffraction pattern is as follows figure 1As shown, there are d-spacing maxima at 14.52, 11.22, 10.1, 9.97, 7.87, 5.98, 5.71, 5.59, 4.53, 3.90, 3.71, 3.54, 3.43, 2.99, 2.86, 2.53 Angstroms. ...

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 relates to a ZSM-5 / ZSM-23 / Y zeolite triphase coexisting molecular sieve and a method for synthesizing the same, and mainly solves the problems that a porous material synthesized by the prior art is single in pore-size, weak in acid and low in activity. The method prepares the ZSM-5 / ZSM-23 / Y zeolite triphase coexisting molecular sieve by adding a seed crystal containing a Y zeolite precursor during a synthesis process of triphase coexisting molecular sieve, and well controlling the nucleating and growing process of a molecular sieve during a synthesis process of triphase coexisting molecular sieve. The coexistence phase ratio of the ZSM-5 / ZSM-23 / Y zeolite triphase coexisting molecular sieve is adjustable, and a mole relation of the components of the synthesized triphase coexisting molecular sieve is nSiO2 :Al2O3, wherein n is between 10 and 1,000; the triphase coexisting molecular sieve has more than three phases; the XRD diffraction pattern of the triphase coexisting molecular sieve comprises a technical proposal that a maximum value of a distance d is at positions between 14.52-0.1 and 14.52+0.1 A, 11.22-0.1 and 11.22+0.1 A, 10.1-0.05 and 10.1+0.1 A, 9.97-0.05 and 9.97+0.05 A, 7.87-0.2 and 7.87+0.2 A, 5.98-0.1 and 5.98+0.1 A, 5.71-0.1 and 5.71+0.1 A, 5.59-0.1 and 5.59+0.1 A, 4.53-0.1 and 4.53+0.1 A, 3.90-0.1 and 3.90+0.1 A, 3.71-0.05 and 3.71+0.05 A, 3.43-0.05 and 3.43 +0.05 A, 2.99-0.05 and 2.99+0.05A, 2.86-0.05 and 2.86+0.05 A, and 2.53-0.1 and 2.53+0.1 A; therefore, the problems are solved well. The triphase coexisting molecular sieve can be used in the industrial production of ethylene and propylene through the catalytic pyrolysis of naphtha.

Description

technical field [0001] The invention relates to a ZSM-5 / ZSM-23 / Y zeolite three-phase symbiotic molecular sieve and a synthesis method thereof. Background technique [0002] ZSM-23, Y zeolite and ZSM-5 porous materials are widely used in petrochemical and other fields due to their good shape-selective catalytic performance and good thermal stability. However, because the two molecular sieve materials have uniform and single pore size, weak acidity, low activity and poor selectivity, they cannot process complex components separately, and their catalytic properties for the same reactant are different. The three-phase symbiotic molecular sieve containing more than two components has a multi-level pore structure and a wide range of strong and weak acids. It can handle complex components with different molecular diameters and exert their synergistic catalytic effect. [0003] Documents CN1565967A and CN1565970A report using mordenite or ZSM-5 as a seed crystal, respectively addin...

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 Applications(China)
IPC IPC(8): C01B39/46C01B39/48C01B39/38C01B39/24
Inventor 马广伟谢在库滕加伟张慧宁
Owner CHINA PETROLEUM & CHEM CORP
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
Eureka Blog
Learn More
PatSnap group products