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

Mixed template synthesis of high silica cu-cha

A technology for synthesizing zeolites and reaction mixtures, applied in molecular sieves and base exchange compounds, inorganic chemistry, molecular sieve catalysts, etc., can solve problems such as lack of metal loading, catalyst stability and activity effects, and harmful hydrothermal stability

Active Publication Date: 2016-09-28
JOHNSON MATTHEY PLC
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, known one-pot processes lack sufficient control over metal loadings, produce framework structures with insufficient silicon-to-aluminum ratios (SAR), and / or must include alkali metals in the synthesis mixture, which can be poisonous acids sites and have detrimental effects on hydrothermal stability
Furthermore, it has been observed that the reported one-pot synthetic procedures for forming metal-containing molecular sieves generate significant amounts (in some instances as much as 20%) of amorphous phases, copper oxides, and other impurities, which are detrimental to catalyst stability. negatively affect the activity of

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
  • Mixed template synthesis of high silica cu-cha

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Example 1: Synthesis of JMZ-3 Zeolite Using One-Pot Mixed-Template Method

[0088] Catalysts obtained by the mixed-template one-pot synthesis procedure described here demonstrate significantly improved quality compared to catalysts obtained by single-template synthesis.

[0089] Here, alkali hydroxide (NaOH) and organic templating agent (DMECHA) were combined in water and mixed for about 5 minutes. Aluminum source (Al(OEt) 3 ) was added to the mixture and mixed for approximately 5 minutes. SiO2 source (SiO 2 ) was added to the mixture and mixed until a homogeneous mixture was formed. Afterwards, seeds (eg, CHA zeolite), Cu source, and TEPA were added to the mixture and mixed for approximately 30 minutes. The resulting mixture was heated at 160°C for about two days. At the end of this heater, the solid was collected by vacuum filtration, rinsed with deionized water and dried at about 100°C for about overnight. The resulting molecular sieve catalyst material was cal...

Embodiment 2

[0090] Example 2: Sodium-free synthesis of JMZ-3 zeolite using a one-pot mixed-template approach

[0091] Na-free synthesis can be achieved by varying the template ratio and the total template / silica ratio. Sodium-free JMZ-3 was prepared using the general procedure from Example 1, but using the synthesis mixture shown in Table 2.

[0092] Table 1 Molar composition of starting synthesis mixture

[0093]

[0094] Sodium-free JMZ-3 showed better overall NO after hydrothermal aging compared to JMZ-3 with sodium x conversion rate (see figure 1 ).

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
sizeaaaaaaaaaa
porosityaaaaaaaaaa
Login to View More

Abstract

A transition-metal-CHA molecular sieve catalyst and mixed-template synthesis procedure are disclosed.

Description

field of invention [0001] The present invention relates to transition metal-containing zeolites having a CHA framework. The invention also relates to a process for the preparation of such transition metal-containing zeolites and their use as catalysts. Background technique [0002] Zeolites are composed of repeating SiO 4 and AlO 4 Crystalline or quasicrystalline aluminosilicates composed of tetrahedral units. These units are linked together to form a framework of regular intracrystalline cavities and channels with molecular dimensions. Various types of synthetic zeolites have been synthesized and each has a unique framework based on a specific arrangement of its tetrahedral units. By convention, each framework type is assigned a unique three-letter designation (eg "CHA") by the International Zeolite Association (IZA). [0003] Synthetic CHA zeolites are typically produced using structure directing agents (SDAs), also known as "templates" or "template agents". SDAs are...

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): B01J29/76B01D53/94C01B39/48
CPCC01B39/48B01D53/9413B01D53/9436B01D53/9477B01D2255/20738B01D2255/20761B01J29/763B01D2255/50B01D53/9418B01J29/044B01J37/0215B01J37/0246C01B39/06B01J35/56B01D53/8628B01D2255/30B01D2257/406B01D2257/40
Inventor J·M·范德克A·里瓦斯-卡多纳H-Y·陈
Owner JOHNSON MATTHEY PLC
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