Silicoaluminophosphate molecular sieve with high silica-alumina ratio and CHA structure, and synthetic method thereof

A technology of silicon-aluminum phosphate and high silicon-aluminum ratio, applied in the direction of molecular sieve and alkali-exchanged phosphate, molecular sieve characteristic silico-aluminophosphate, etc. Improved catalytic activity, good technical effect, and reduced coking rate

Active Publication Date: 2014-10-22
CHINA PETROLEUM & CHEM CORP +1
View PDF15 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] One of the technical problems to be solved by the present invention is the low silicon-aluminum ratio of silicon-aluminum phosphate molecular sieve with CHA structure, poor reactivity and fast coking rate when use

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
  • Silicoaluminophosphate molecular sieve with high silica-alumina ratio and CHA structure, and synthetic method thereof
  • Silicoaluminophosphate molecular sieve with high silica-alumina ratio and CHA structure, and synthetic method thereof
  • Silicoaluminophosphate molecular sieve with high silica-alumina ratio and CHA structure, and synthetic method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] [Example 1]

[0029] Weigh 4.3g pseudo-boehmite (70wt%, 0.029mmol), 1.7g H 3 PO 4 (85wt%, 0.015 mol) g dissolved in 151.4mL deionized water, after stirring, transfer the uniformly mixed solution to a 40℃ oil bath environment, add 2.43g TMAOH (40wt%, 0.06mol) and 126.2g under stirring Silica sol (40wt%, 0.84mol), sealed and vigorously stirred until the mixture is uniform, the USY seed crystal (the molar ratio of silicon to aluminum is 8.9) and NaCl, which account for 3.1% of the total weight of the reactant, is put into the reaction solution and the oil The bath warms to 60 o C Continue to stir. After the mixture is completely mixed, place the crystallization mixture in a pressure-resistant container lined with polytetrafluoroethylene and crystallize at 140°C for 5 days. After filtering and washing, the product is dried at 130°C and then heated to 500°C. It is calcined at a constant temperature at ℃ to obtain a high silicon-to-aluminum ratio CHA structure silicon-aluminum p...

Example Embodiment

[0031] [Example 2]

[0032] Weigh 11.5g aluminum isopropoxide (0.056mol) and 3.83g H 3 PO 4 (85wt%, 0.06 mol) g into 63.4mL deionized water, after stirring evenly, transfer the evenly mixed solution to a 60℃ oil bath environment, add 3.83g BTAC (99wt%, 0.3mol) and 96g silica sol under stirring (40wt%, 0.64mol), after airtight and vigorously stirring until the mixture is uniform, 2.6% of the total weight of the reactant dry basis USY seed crystal (molar ratio of silicon to aluminum is 3.5) and KCl are put into the reaction solution and the oil bath is heated Up to 80 o C. Continue to stir. After the mixture is completely mixed, place the crystallization mixture in a pressure vessel with PTFE lining and crystallize at 180°C for 3d. After filtering and washing, the product is dried at 110°C and then heated It is calcined at a constant temperature of 550°C to obtain a high silicon-to-aluminum ratio CHA structure silicon-aluminum phosphate molecular sieve product. The final silico...

Example Embodiment

[0034] [Example 3]

[0035] Will Al 2 O 3 The content is 4.3g pseudo-boehmite (70wt%, 0.029mol), 5.0g H 3 PO 4 (85wt%, 0.043 mol) g, dissolved in 160.8mL deionized water, after stirring evenly, transfer the uniformly mixed solution to a 60℃ oil bath environment, add 13.8g TMAOH (40wt%, 0.033mol), 1.3 under stirring gTEA (0.013 mol) and 191.4g silica sol (40wt%, 1.28mol), sealed and strongly stirred until the mixture is uniform, the USY seed crystal (mole ratio of silicon to aluminum) with a silicon to aluminum ratio of 3.6% of the total weight of the reactant 2.4) and NaCl is put into the reaction solution and the oil bath is heated to 80 o C Continue to stir. After the mixture is completely mixed and uniform, the reaction mixture is placed in a pressure vessel with a polytetrafluoroethylene lining and crystallized at 190°C for 1.5 days. The product is filtered and washed, dried at 120°C, and then heated It is calcined at a constant temperature of 550°C to obtain a high sili...

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 discloses a silicoaluminophosphate molecular sieve with a high silica-alumina ratio and a CHA structure, and a synthetic method thereof. The problems of low silica-alumina ratio, poor activity on a methanol-to-low carbon olefin reaction, and fast coking rate of silicoaluminophosphate molecular sieve with the CHA structure are mainly solved. The atom ratio of silicon/aluminum of the silicoaluminophosphate molecular sieve with a high silica-alumina ratio and a CHA structure is 10-25. The silicoaluminophosphate molecular sieve with a high silica-alumina ratio and a CHA structure well solves the problems, and can be used in the methanol-to-low carbon olefin industrial production.

Description

technical field [0001] The invention relates to a silicon-aluminophosphate molecular sieve with a high silicon-aluminum ratio CHA structure and a synthesis method thereof. Background technique [0002] The traditional zeolite molecular sieve is composed of silicon-oxygen tetrahedron [SiO 4 ] 4- and alumina tetrahedron [AlO 4 ] 5- Connected by sharing oxygen atoms, collectively referred to as TO 4 Tetrahedron (primary structural unit), such as A-type, X-type, L-type, Y-type, mordenite developed in the 1940s and ZSM-n series prepared in the 1960s (ZSM-1, ZSM-5, ZSM-11, ZSM-22, ZSM-48, etc.) Zeolite molecular sieves, etc. With the continuous expansion of the application field of zeolite and the demand for new properties and performances of scientific research and development, a lot of energy has been devoted to the synthesis and preparation of new zeolite molecular sieves. [0003] In 1982, scientists Wilson S.T. and Flanigen E.M. of Union Carbide Corporation (UCC) succe...

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): C01B39/54C01B37/08
Inventor 乔健肖景娴汪哲明滕加伟杨为民
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
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