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

Method for preparing full-silicon DD3R zeolite molecular sieve with pure phase and uniform crystal morphology and size

A zeolite molecular sieve, all-silicon technology, applied in chemical instruments and methods, molecular sieves and alkali exchange compounds, inorganic chemistry, etc., can solve the problems of poor product quality, low repetition rate and high cost, achieve high quality and reduce synthesis energy. consumption and shortening the crystallization time

Inactive Publication Date: 2012-11-21
ZHEJIANG NORMAL UNIVERSITY
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method with simple process and low cost for the shortcomings of the above-mentioned complex process, high cost, low repetition rate, poor product quality and difficulty in industrial production in the existing process of synthesizing DD3R zeolite molecular sieve. A method for preparing all-silicon DD3R zeolite molecular sieves with pure phase, uniform crystal morphology and size, low cost, good repeatability and high product quality

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 preparing full-silicon DD3R zeolite molecular sieve with pure phase and uniform crystal morphology and size
  • Method for preparing full-silicon DD3R zeolite molecular sieve with pure phase and uniform crystal morphology and size
  • Method for preparing full-silicon DD3R zeolite molecular sieve with pure phase and uniform crystal morphology and size

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 3 mL of silicon source in 30 mL of deionized water, stir vigorously, and add 1.6 g of amantadine. After stirring for a while, add 1.3 g of KF to obtain a mixed solution. Add 0.036g of seed crystals to the mixed system obtained in the above steps, mix and stir for 2 hours, transfer to a 50mL hydrothermal reaction kettle, and place it at 170°C for crystallization for 1 day; filter the obtained sample with deionized water Wash, dry at 110°C for 12 hours, and then bake in a muffle furnace at 700°C for 8 hours to obtain a sample. The XRD spectrum of the sample is shown in figure 1 -Example 1, as can be seen from the characterization diagram, the characteristic diffraction peaks of DD3R molecular sieves appeared at 2θ=7.68°, 15.39° and 17.13°, indicating that the synthesized sample is DD3R molecular sieve; the SEM photo is shown in figure 2 -Example 1, the DD3R molecular sieve crystal in the figure has a clear outline, regular shape, parallelepiped, and a grain siz...

Embodiment 2

[0023] Dissolve 3 mL of silicon source in 30 mL of deionized water, stir vigorously, and add 0.8 g of amantadine. After stirring for a while, add 2.6 g of KF to obtain a mixed solution. Add 0.036g of seed crystals to the mixed system obtained in the above steps, mix and stir for 2 hours, transfer to a 50mL hydrothermal reaction kettle, and place it at 170°C for crystallization for 1 day; filter the obtained sample with deionized water Wash, dry at 110°C for 12 hours, and then bake in a muffle furnace at 700°C for 8 hours to obtain a sample. The XRD spectrum of the sample is shown in figure 1 -Example 2, it can be seen from the characterization diagram that the characteristic diffraction peaks of DD3R molecular sieve appear at 2θ=7.68°, 15.39° and 17.13°, indicating that the synthesized sample is DD3R molecular sieve. SEM photo see figure 2 -Example 2, the DD3R molecular sieve crystals in the figure have clear outlines, regular shapes, parallelepipeds, and a grain size of ab...

Embodiment 3

[0025] Dissolve 3 mL of silicon source in 25 mL of deionized water, stir vigorously, and add 1.6 g of amantadine. After stirring for a while, add 1.3 g of KF to obtain a mixed solution. Add 0.036g of seed crystals to the mixed system obtained in the above steps, mix and stir for 2 hours, then transfer to a 50mL hydrothermal reaction kettle, and crystallize at 170°C for 3 days; filter the obtained samples with deionized water Wash, dry at 110°C for 12 hours, and then bake in a muffle furnace at 700°C for 8 hours to obtain a sample. The XRD spectrum of the sample is shown in figure 1-Example 3, it can be seen from the characterization diagram that the characteristic diffraction peaks of DD3R molecular sieve appear at 2θ=7.68°, 15.39° and 17.13°, indicating that the synthesized sample is DD3R molecular sieve. SEM photo see figure 2 -Example 3, the DD3R molecular sieve crystal in the figure has a clear outline, regular shape, regular octahedron, and a grain size of about 8 μm; ...

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
Pore volumeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing a full-silicon DD3R zeolite molecular sieve with a pure phase and uniform crystal morphology and size. The purpose of the invention is to provide the method for preparing the full-silicon DD3R zeolite molecular sieve with the pure phase and uniform crystal morphology and size. The method is simple in process, low in cost, good in repeatability and excellent in product quality. The method for preparing the full-silicon DD3R zeolite molecular sieve comprises the following steps: (1) adding an organic structure directingagent, a silicon source and a mineralizer into deionized water to mix and agitate; (2) adding a crystal seed to a mixing system obtained from the step (1); after mixing, agitating and aging, transferring the mixture into a hydrothermal reaction kettle to crystallize; (3), filtering and washing a sample obtained from the step (2), and obtaining the pure-phase DD3R zeolite molecular sieve with uniform crystal morphology and size after drying and baking the sample. The method has the characteristics that the crystallization time is short, the synthetic energy consumption is low, and the obtained pure-phase DD3R zeolite molecular sieve has excellent quality.

Description

technical field [0001] The invention belongs to the technical field of microporous materials, in particular to a method for preparing all-silicon DD3R zeolite molecular sieves with pure phase, uniform crystal shape and size. Background technique [0002] The skeleton structure of all-silica zeolite molecular sieve DD3R (Gies, Z. Kristallogr. 1986, 175, 93-104) is composed of decahedron [4 3 5 6 6 1 ], dodecahedron[5 12 ] and the nineteen-sided [4 3 5 12 6 1 8 3 ] Three basic structures, the unit cell structure is hexagonal. Common angle [SiO 4 ] 4- A five-sided dodecahedron coplanar with [5 12 ] The fake six-sided layer composed of ] is connected. These toppings are stacked in the order ABCABC. between the layers by additional [SiO 4 ] 4- The six-membered rings are connected. The larger nineteen-sided structural units communicate through the eight-membered rings, forming a two-dimensional channel structure between the planes formed by the dodecahedrons. Among...

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): C01B39/46
Inventor 朱伟东彭安娜
Owner ZHEJIANG NORMAL UNIVERSITY
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