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

Method of removing organic template agent from molecular sieve

A technology of organic template agent and molecular sieve, which is applied in the direction of crystalline aluminosilicate zeolite, etc., can solve the problems of resistance to oxidation, severe reaction conditions, and acid resistance, etc., to achieve improved performance, simple operation, large pore volume and pore size Effect

Inactive Publication Date: 2007-03-28
ZHEJIANG UNIV
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biggest advantage of this method is that the operation time is short, only a few minutes, but the reaction conditions are too severe, and it is powerless for some molecular sieves that are not resistant to oxidation and acid.

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

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Removal of organic amine templates in microporous molecular sieve BEA. The BEA former powder containing organic amine (tetraethylammonium hydroxide) obtained by synthesis of 0.6 gram is placed in a glass reactor with a jacket (the reactor is cooled with tap water all the time to ensure that the reaction is carried out at room temperature), add 60ml, The hydrogen peroxide solution with a concentration of 0.1-10% is adjusted to a pH of 1-7 with HCl, irradiated with a medium-pressure Hg ultraviolet lamp for 1-5 hours, filtered and washed with deionized water after the reaction is completed. The obtained samples were characterized by elemental analysis, XRD, N2 adsorption and other means. The results show that the template agent has been removed 100%, and compared with the roasting method, the sample structure obtained by this method has basically no shrinkage, and the pore diameter, pore volume, and specific surface area are higher.

example 2

[0017] Removal of Mesoporous Molecular Sieve MCM-41 Cationic Surfactant Template. The MCM-41 former powder that contains cationic active agent (cetyltrimethyl ammonium bromide) that 0.6 gram is synthesized is placed in the glass reactor with jacket (reactor cools with tap water all the time and guarantees to react at room temperature Carry out), add 60ml, concentration 0.1~5% hydrogen peroxide aqueous solution, use H 2 SO 4 Adjust pH=1-7, irradiate with ultraviolet light for 1-4 hours, filter and wash with deionized water after the reaction is completed. The obtained samples were analyzed by elemental analysis, XRD, N 2 Adsorption and other means to characterize. The results show that the template has been removed 100%, and compared with the roasting method, the order of the skeleton of the sample obtained by this method is greatly improved, the skeleton basically does not shrink, and the pore diameter / pore volume is larger and the specific surface area is higher.

example 3

[0019] Removal of Mesoporous Molecular Sieve SBA-15 Nonionic Surfactant Template. 0.6 gram of synthetic nonionic surfactant (block polymer P 123 ) SBA-15 former powder is placed in the glass reactor with jacket (the reactor is always cooled with tap water to ensure that the reaction is carried out at room temperature), add 60ml, concentration 0.1~5% hydrogen peroxide aqueous solution and 1~500ppmFe 2+ , use NaOH to adjust pH=1-10, irradiate with ultraviolet light for 0.5-5 hours, filter and wash with deionized water after the reaction is completed. The obtained samples were analyzed by elemental analysis, XRD, N 2 Adsorption and other means to characterize. The results show that the template agent has been 100% removed, and compared with the roasting method, the order of the skeleton of the sample obtained by this method is greatly improved, the skeleton basically does not shrink, and the pore diameter and pore volume are larger, and the specific surface area is higher.

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 method of removing organic template agent from molecular sieve includes: setting the molecular sieve containing organic template agent inside photoreactor, adding water solution of hydrogen peroxide in the amount of 1-10 wt% of the molecular sieve, stirring the reaction system, regulating pH value with inorganic acid or base to 1-10, irradiating the reaction system with ultraviolet ray for reaction at room temperature of 0.5-5 hr, filtering the reacted solution and washing with deionized water. Compared with available methods; the method of the present invention effectively removing organic template agent from molecular sieve at room temperature, mild conditions and simple operation.

Description

technical field [0001] The technology belongs to the field of inorganic porous materials, and specifically relates to a method for removing organic templates in molecular sieves. technical background [0002] Molecular sieve materials are widely used in the fields of adsorption, separation, catalysis, ion exchange and host-guest assembly due to their regular channels, large surface area and rich morphology. As we all know, the synthesis of molecular sieves is characterized by the introduction of organic template molecules (organic amines, surfactants or block polymers). Organic templates play a very important role in the synthesis of molecular sieves. Many porous materials with rich compositions and novel structures The successful synthesis of materials should be attributed to the existence of organic templates. Although the mechanism of action of organic templates has not been fully understood, one thing is certain, that is, most of the templates are eventually retained in ...

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): C01B39/04
Inventor 肖丽萍沈旭杰徐如人
Owner ZHEJIANG 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