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

Method for synthesizing Beta molecular sieve by organic-free template

A technology without organic template and molecular sieve, applied in the field of catalytic chemistry, can solve the problems of application restriction, energy consumption, increased cost, etc., and achieve the effect of rapid synthesis and improvement of crystallization rate

Inactive Publication Date: 2008-08-27
JILIN UNIV
View PDF1 Cites 156 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it shows very superior performance in the catalytic reaction, its application is still severely restricted, because organic templates are used in the synthesis of Beta molecular sieves, which not only increases the cost of synthesis; but also removes these organic templates. Molecular sieves are often roasted at high temperatures, which results in energy consumption and environmental pollution

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
  • Method for synthesizing Beta molecular sieve by organic-free template
  • Method for synthesizing Beta molecular sieve by organic-free template
  • Method for synthesizing Beta molecular sieve by organic-free template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: rapid synthesis of Beta molecular sieve without template

[0029] The starting material molar ratio of Beta molecular sieve synthesis is as follows: 40.28SiO 2 / 1.00Al 2 o 3 / 10.46Na 2 O / 566.66H 2 O, where NaOH / SiO 2 =0.45,H 2 O / SiO 2 About 14. The specific synthesis process is as follows: 0.117g of NaAlO 2 and 0.36g of NaOH dissolved in 5.04ml of H 2 O, after being dissolved, 1.2g of white carbon black was added to the above solution. After stirring for about 10-15 minutes, 0.12g Beta zeolite seed crystals (provided by Sinopec, SiO 2 / Al 2 o 3 =22, SEM and XRD (as shown in Figure 1 and Figure 2) were added to the above gel, and continued to stir at room temperature for about 10-15 minutes. Afterwards, the above-mentioned gel was put into a stainless steel reactor with polytetrafluoroethylene lining, and crystallized at 140° C. for about 19 hours. After cooling, filter at room temperature and dry overnight at 80°C to obtain the product. Acco...

Embodiment 2

[0031] Embodiment 2: rapid synthesis of Beta molecular sieve without template

[0032] The starting material molar ratio of Beta molecular sieve synthesis is as follows: 40.28SiO 2 / 1.00Al 2 o 3 / 11.46Na 2 O / 566.66H 2 O, where NaOH / SiO 2 =0.50,H 2 O / SiO 2 About 14. The specific synthesis process is as follows: 0.117g of NaAlO 2 and 0.40 g of NaOH dissolved in 5.04 ml of H 2 O, after being dissolved, 1.2 g of white carbon black was added to the above solution. After stirring for about 10-15 minutes, 0.084 g of Beta zeolite seed crystals (provided by Sinopec) were added to the above gel, and stirring was continued at room temperature for about 10-15 minutes. Afterwards, the above-mentioned gel was put into a stainless steel reaction kettle with polytetrafluoroethylene lining, and crystallized at 140° C. for 19 hours. After cooling, filter at room temperature and dry overnight at 80°C to obtain the product. According to X-ray diffraction characterization, the product ...

Embodiment 3

[0033] Embodiment 3: template-free rapid synthesis of Beta molecular sieves

[0034] The starting material molar ratio of Beta molecular sieve synthesis is as follows: 40.28SiO 2 / 1.00Al 2 o 3 / 11.46Na 2 O / 526.37H 2 O, where NaOH / SiO 2 =0.50,H 2 O / SiO 2 About 13. The specific synthesis process is as follows: 0.117g of NaAlO 2 and 0.40 g of NaOH dissolved in 4.68 ml of H 2 O, after being dissolved, 1.2 g of white carbon black was added to the above solution. After stirring for about 10-15 minutes, 0.12 g of Beta zeolite seed crystals (provided by Sinopec) were added to the above gel, and stirring was continued at room temperature for about 10-15 minutes. Afterwards, the above-mentioned gel was put into a stainless steel reaction kettle with polytetrafluoroethylene lining, and crystallized at 140° C. for 19 hours. After cooling, filter at room temperature and dry overnight at 80°C to obtain the product. It is known through X-ray diffraction characterization that the ...

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 method of synthesizing Beta molecular sieve without organic templates, which belongs to the technical field of catalytic chemistry. The steps of the invention comprise mixing alkali oxide sources, alumina sources, silica sources and water, stirring and synthesizing initial silica-alumina gel, then adding with Beta zeolite crystal seed, crystallizing 12-24 hours under the temperature of 100-180 DEG C and hydro-thermally synthesizing the Beta molecular sieve, SiO2 / Al2O3 of the Beta zeolite crystal seed equals 22-25, and the quality of addition quantity is 5%-20% of the silica sources. The method of the invention suits requirements of applying zeolite molecular sieve in industry, not only can directly synthesize high crystallinity crystal of the Beta molecular, but also can increase crystallizing speed of the molecular and reduce manufacturing cost. Because the synthesis process doesn't use any organic templates without roasting, thereby a pore path is unimpeded, and environmental pollution and relatively consumption are avoided.

Description

technical field [0001] The invention belongs to the technical field of catalytic chemistry; in particular, it relates to a method for synthesizing Beta molecular sieves without using an organic template. Background technique [0002] Beta molecular sieves with three-dimensional 12-membered rings are widely used in petroleum refining and chemical industry as a very important catalytic material. Under normal circumstances, when using an organic template, for example, tetraethylammonium hydroxide (TEA + Oh - ) as a template, the synthesis time is generally 2 to 5 days. Moreover, these templates are all filled in the pores. Although it shows very superior performance in the catalytic reaction, its application is still severely restricted, because organic templates are used in the synthesis of Beta molecular sieves, which not only increases the cost of synthesis; but also removes these organic templates. Molecular sieves are often roasted at high temperatures, which results i...

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): C01B39/02
Inventor 肖丰收谢彬宋江伟任利敏纪研研
Owner JILIN 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