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

Double-ester-group aliphatic chain organosilane quaternary ammonium salt type compounds and preparation and applications thereof

An organosilane, quaternary ammonium salt technology, applied in the field of mesoporous ZSM-5 silica-alumina molecular sieves, can solve problems such as unfavorable large-scale application, weak acidity, poor stability, etc., to improve the internal diffusion limit and keep the crystallinity intact , the effect of fast homogenization

Inactive Publication Date: 2015-01-07
DONGHUA UNIV
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mesoporous molecular sieves have the disadvantages of weak acidity and poor stability, which are not conducive to large-scale application

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
  • Double-ester-group aliphatic chain organosilane quaternary ammonium salt type compounds and preparation and applications thereof
  • Double-ester-group aliphatic chain organosilane quaternary ammonium salt type compounds and preparation and applications thereof
  • Double-ester-group aliphatic chain organosilane quaternary ammonium salt type compounds and preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Synthesis of diester-based aliphatic chain (n=4) organosilane quaternary ammonium salt: Weigh 5g of hexanoic acid and 2g of 3-dimethylamino-1,2-propanediol, add the two to a 250mL three-necked flask, add 100mL Toluene, stir to mix evenly, heat up to 130°C at a heating rate of 1-5°C / min, reflux and divide water for 12 hours, wash the resulting mixed solution with water and 10% sodium carbonate solution repeatedly until no foam occurs , dry with anhydrous calcium chloride, obtain 1.8g diester-based aliphatic chain intermediate after column chromatography;

[0043]Add the intermediate obtained above and 2g (3-iodopropyl)trimethoxysilane into a 50mL round-bottomed flask, heat to 110°C at a heating rate of 1-5°C / min, and react for 24h under continuous stirring. After the reaction, Naturally cooled to room temperature, washed several times with anhydrous ether to obtain 2.3 g of diester-based aliphatic chain organosilane quaternary ammonium salt compound. Its structural form...

Embodiment 2

[0045] Synthesis of diester-based aliphatic chain (n=8) organosilane quaternary ammonium salt: Weigh 7g of lauric acid and 2g of 3-dimethylamino-1,2-propanediol, add the two to a 250mL three-necked flask, add 100mL Toluene, stir to mix evenly, heat up to 130°C at a heating rate of 1-5°C / min, reflux and divide water for 12 hours, wash the resulting mixed solution with water and 10% sodium carbonate solution repeatedly until no foam occurs , dry with anhydrous calcium chloride, obtain 2.3g diester-based aliphatic chain intermediates after column chromatography;

[0046] Add the intermediate obtained above and 3g (3-iodopropyl)trimethoxysilane into a 50mL round-bottomed flask, heat to 110°C at a heating rate of 1-5°C / min, and react for 24h under continuous stirring. After the reaction, Naturally cooled to room temperature, washed several times with anhydrous ether to obtain 2.8g diester-based aliphatic chain organosilane quaternary ammonium salt compound, its structural formula i...

Embodiment 3

[0048] Synthesis of diester-based aliphatic chain (n=12) organosilane quaternary ammonium salt: Weigh 8g of palmitic acid and 2g of 3-dimethylamino-1,2-propanediol, add the two to a 250mL three-necked flask, add 100mL of toluene, stir to mix evenly, heat up to 130°C at a heating rate of 1-5°C / min, reflux and divide water for 12h, wash the resulting mixed solution with water and 10% sodium carbonate solution repeatedly until no foam Produced, dried with anhydrous calcium chloride, and obtained 2.9g diester-based aliphatic chain intermediates after column chromatography;

[0049] Add the intermediate obtained above and 3.5g (3-iodopropyl)trimethoxysilane into a 50mL round bottom flask, heat to 110°C at a heating rate of 1-5°C / min, and react for 24h under continuous stirring. , naturally cooled to room temperature, washed several times with anhydrous ether to obtain 3.7g diester-based aliphatic chain organosilane quaternary ammonium salt compound, its structural formula is as fol...

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 provides double-ester-group aliphatic chain organosilane quaternary ammonium salt type compounds and preparation and applications thereof. The general formula of the compounds is shown in the specification, wherein m is any integer from 1 to 5, n is any integer from 2 to 16, and X is F, CL, Br or I. Cheap silicon and aluminum sources, a micropore template agent and an organic template agent are adopted as raw materials, mechanical stirring is adopted as auxiliary, and a mesoporous ZSM-5 molecular sieve with an MFI structure and a high silicon-aluminum ratio is synthesized by a hydrothermal method. Mesopores are introduced into the ZSM-5 structure so as to communicate ten-membered ring channels in layers and to improve inner diffusional limitation. The specific template agents are adopted to stabilize the skeleton, so that the degree of crystallinity of the prepared molecular sieve is maintained well and resistance to high temperature is enhanced. The molecular sieve is suitable for macromolecule reactions, such as an alkylation reaction of benzene and isopropanol, and an alkylation reaction of methylnaphthalene and methanol.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, and in particular relates to a method for synthesizing a mesoporous ZSM-5 silicon-aluminum molecular sieve with an MFI-type pore structure from a diester-based aliphatic chain organosilane quaternary ammonium salt template agent. Background technique [0002] Zeolite molecular sieve is a microporous material with stable structure and pores of a certain size. It has excellent shape-selective catalytic performance, sieving effect, thermal stability, strong acidity and hydrothermal stability. It is widely used in fine chemical industry, petroleum Catalytic cracking and other key areas related to the national economy and the people's livelihood and the lifeline of the national economy. [0003] ZSM-5 molecular sieve is a zeolite molecular sieve [US3702886] developed by Mobile Company in 1972. ZSM-5 zeolite has a high silicon-aluminum ratio, and molecular sieves with differe...

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): C07F7/18C01B39/40
Inventor 刘栋良韩佳吉
Owner DONGHUA UNIV
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