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

Synthesis method of titanium-silicon molecular sieve TS-1

A titanium-silicon molecular sieve, TS-1 technology, applied in the direction of crystalline aluminosilicate zeolite, etc., to achieve the effect of good catalytic activity

Active Publication Date: 2013-07-24
JIANGSU YIDA CHEM
View PDF7 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After cooling, perform solid-liquid separation operation on the crystallization reactant

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
  • Synthesis method of titanium-silicon molecular sieve TS-1
  • Synthesis method of titanium-silicon molecular sieve TS-1
  • Synthesis method of titanium-silicon molecular sieve TS-1

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In this example, the feeding is carried out according to the following ratio: n (tetraethyl orthosilicate): n (tetrabutyl titanate): n (tetrapropylammonium bromide): n (H 2 O):n(IPA)=1:0.025:0.4:40:0.6. First, tetraethyl orthosilicate and distilled water were mixed under the condition of mechanical stirring, and dilute acid was added to adjust the pH value of the solution to 3.0, and the temperature was kept at 40° C. for 1 hour. Add the isopropanol solution of tetrabutyl titanate and dilute ammonia solution to the silicon source hydrolyzate at the same time, then add the template agent to the above hydrolyzate, and adjust the pH value of the solution to 13 with triethylamine solution, and then 40 °C Constant temperature 1h. The temperature of the reaction solution was raised to 85°C, and the alcohol was purged with nitrogen. Cool down and replenish water after alcohol catching. The obtained titanium-silicon precursor gel was divided into three sealed stainless steel...

Embodiment 2

[0039] In this example, the feeding is carried out according to the following ratio: n (tetrabutyl orthosilicate): n (tetraethyl titanate): n (tetrapropylammonium bromide): n (H 2 O):n(IPA)=1:0.03:0.3:60:0.8. Firstly, tetrabutyl orthosilicate and distilled water were mixed under the condition of mechanical stirring, and dilute acid was added to adjust the pH value of the solution to 3.0, and the temperature was kept at 40° C. for 1 hour. Add the isopropanol solution of tetraethyl titanate and dilute ammonia solution to the silicon source hydrolyzate at the same time, then add the templating agent to the above hydrolyzate, and adjust the pH value of the solution to 13 with triethylamine solution, then 40 °C Constant temperature 1h. The temperature of the reaction solution was raised to 85°C, and the alcohol was purged with nitrogen. Cool down and replenish water after alcohol catching. The obtained titanium-silicon precursor gel was divided into three sealed stainless steel ...

Embodiment 3

[0041] In this example, the feeding is carried out according to the following ratio: n (tetraethyl orthosilicate): n (tetrabutyl titanate): n (tetrapropyl ammonium hydroxide): n (H 2 O):n(IPA)=1:0.035:0.5:50:1. First, tetraethyl orthosilicate and distilled water were mixed under the condition of mechanical stirring, and dilute acid was added to adjust the pH value of the solution to 3.0, and the temperature was kept at 40° C. for 1 hour. Add the isopropanol solution of tetrabutyl titanate and dilute ammonia solution to the silicon source hydrolyzate at the same time, then add the templating agent to the above hydrolyzate, and adjust the pH value of the solution to 13 with triethylamine solution, and then 40°C Constant temperature 1h. The temperature of the reaction solution was raised to 85°C, and the alcohol was purged with nitrogen. Cool down and replenish water after alcohol catching. The obtained transparent titanium-silicon precursor gel was divided into three sealed s...

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 synthesis method of a titanium-silicon molecular sieve TS-1. The method comprises the steps of: preparing titanium-silicon gel from a titanium source, a silicon source, a template agent and water by a certain mole ratio, and hydrothermally crystallizing the gel in a closed reaction kettle by utilizing the pressure generated by the gel self; and then filtering, washing, drying and roasting, thus obtaining the molecular sieve TS-1. According to the method, the titanium source can be effectively hydrolyzed in the preparation of a precursor, the sedimentation of TiO2 is reduced and avoided even, and Ti is enabled to enter a framework, so that the molecular sieve TS-1 with high activity is prepared. When the molecular sieve TS-1 is used as a catalyst for propylene epoxidation in a pilot experiment, the conversion rate of hydrogen peroxide and the selectivity of epoxy propane are enhanced greatly.

Description

technical field [0001] The invention relates to a synthesis method of titanium silicon molecular sieve TS-1. It belongs to the field of molecular sieve preparation. Background technique [0002] Titanium silicalite molecular sieve refers to a type of heteroatom molecular sieve containing titanium atoms in the zeolite molecular sieve framework. In 1983, Taramasso et al reported the preparation of titanium-silicon molecular sieve TS-1 by hydrothermal method. Titanium silicalite molecular sieve is a derivative of Silicalite-1 zeolite, and TS-1 is a titanium-containing heteroatom molecular sieve with the same MFI structure as silica-alumina molecular sieve ZSM-5. The excellent catalytic oxidation activity of titanium silicate molecular sieves is based on the neutral Ti 4+ Active neutral, its remarkable function is to H 2 o 2 Participated in the selective oxidation of organic matter has a good effect, and will not be deeply oxidized. TS-1 can catalyze epoxidation of olefins...

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): C01B39/08
Inventor 刘准曹惠庆吴建磊张虎祝义鹏戴露
Owner JIANGSU YIDA CHEM
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