Modification method for titanium silicalite molecular sieves

A titanium-silicon molecular sieve, molecular sieve technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of decreased catalytic activity, influence of strip catalyst strength, diffusion to the outside, etc., to improve catalytic activity. , excellent catalytic activity, high catalytic activity

Inactive Publication Date: 2014-05-14
DALIAN UNIV OF TECH
View PDF15 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This molding method has the advantage of high content of active components, but it also has the problem that the heat of reaction is not easily diffused from the inside of the catalyst particle to the outside, and the addition of a carrier or binder will block the pores of the molecular sieve, greatly improving its

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
  • Modification method for titanium silicalite molecular sieves
  • Modification method for titanium silicalite molecular sieves
  • Modification method for titanium silicalite molecular sieves

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Example 1

[0036] After mixing 8g strip TS-1-A sample with 80mL 0.06mol / L ethylamine aqueous solution, put it into a 100mL stainless steel crystallization kettle with PTFE lining, and modify it at 170℃ under autogenous pressure After 48h, take it out and go through solid-liquid separation. The solid was washed with deionized water to neutrality, and then dried and calcined at 540°C for 6h. The TS-1 sample was numbered TS-1-C.

Example Embodiment

[0037] Example 2

[0038] The strip TS-1-B sample was processed in the same way as in Example 1, and the obtained TS-1 sample was numbered TS-1-D.

Example Embodiment

[0039] Example 3

[0040] The strip TS-1-A sample was processed in the same way as in Example 1, except that the modifier was replaced with 0.04mol / L tetrapropylammonium hydroxide aqueous solution, and the TS-1 sample obtained was numbered It is TS-1-E.

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 modification method for titanium silicalite molecular sieves, which aims to further improve the catalytic activity and stability of the titanium silicalite molecular sieves. The method is used for processing a titanium silicalite molecular sieve subjected to strip extrusion molding, so that a carrier introduced by strip extrusion can be crystallized and formed into a new molecular sieve skeleton with catalytic activity, and no negative impact is produced on the strength of the strip titanium silicalite molecular sieve. Compared with modified molecular sieves prepared in the prior art, the modified titanium silicalite molecular sieve prepared by using the modification method has higher catalytic activity and a longer service life to selective catalytic oxidation reaction such as alkene epoxidation, phenol hydroxylation, and ketone ammoxidation.

Description

technical field [0001] The invention relates to a method for modifying titanium-silicon molecular sieves. Background technique [0002] Since the synthesis of titanium-silicon molecular sieve TS-1 was first reported in U.S. Patent 4410501 in 1983, its oxidation system composed of hydrogen peroxide has shown excellent catalytic activity and Selectivity, and the by-product is water, which is an environmentally friendly process, so it has attracted widespread attention. Subsequently, various Ti-containing heteroatom molecular sieves, such as TS-2, Ti-β, Ti-MCM-22, Ti-SBA-15, and Ti-TUD-1, were synthesized and used to catalyze selective oxidation reactions. . [0003] Titanium-silicon molecular sieves with different pore structures have certain pore shape selectivity for catalyzing reactants with different molecular sizes. Microporous molecular sieves such as TS-1 and TS-2 have a small pore size and have high reactivity for small molecules (such as propylene epoxidation), but...

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): B01J29/89C07D303/04C07D301/12
Inventor 左轶郭新闻刘民张安峰
Owner DALIAN UNIV OF TECH
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