Method for synthesizing analcime by microwave hydrothermal crystallization of coal gangue

A microwave hydrothermal and coal gangue technology, applied in chemical instruments and methods, crystalline aluminosilicate zeolite, chemical/physical processes, etc., can solve the problem of high cost of zeolite synthesis

Active Publication Date: 2021-05-18
TAIYUAN UNIV OF TECH
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional analcime synthesis mainly uses chemical reagents as raw materials, and often requires the addition of organic templates, resulting in high cost of zeolite synthesis

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 analcime by microwave hydrothermal crystallization of coal gangue
  • Method for synthesizing analcime by microwave hydrothermal crystallization of coal gangue
  • Method for synthesizing analcime by microwave hydrothermal crystallization of coal gangue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Chemical materials: coal gangue, sodium hydroxide, ethyl orthosilicate, ultrapure water. The combined preparation dosage is as follows: take gram and milliliter as the measurement unit.

[0025]

[0026] A method for hydrothermally synthesizing analcite molecular sieves using microwave activation, the steps of which are:

[0027] ① Prepare the mixed solution: weigh 0.4g of CaO ball-milled coal gangue, 1.6g of sodium hydroxide, and then add 40ml of ultrapure water into a polytetrafluoroethylene container.

[0028] ②Put the polytetrafluoroethylene container containing the mixed solution in the reaction kettle, and activate it in a microwave reactor at 160°C for 40 minutes to dissolve the active aluminosilicate.

[0029] ③ After the reaction stops, take the above-mentioned active aluminosilicate solution, add 2.4ml of tetraethyl orthosilicate, stir and age in a polytetrafluoroethylene reactor for 4h.

[0030] ④ After aging, put the polytetrafluoroethylene container in...

Embodiment 2

[0038] In order to further embody the advantages of the technical solution of the present invention, the inventors conducted a conditional study on the amount of sodium hydroxide added, and synthesized them respectively according to the parameters in Table 1.

[0039] Table 1

[0040]

[0041] Note: Low crystallinity in the table means that the test product has poor crystallinity and uneven particles; pure phase means that the test product is the target product, with uniform particles and uniform particle size.

[0042] In this example, by changing the amount of NaOH to explore its influence on the dissolution of aluminosilicate in coal gangue as an alkaline activator, the results show that increasing the amount of alkali cannot synthesize pure-phase analcime. When the amount of NaOH is 1.6g, the synthesis The effect is the best, the crystal is pure and the particle size is uniform.

Embodiment 3

[0044] The inventors explored the temperature, and synthesized at different temperatures, and the final result showed that analcime, a crystal material with good crystallinity, could be successfully synthesized at 160°C. The specific experimental parameters are shown in Table 2:

[0045] Table 2

[0046]

[0047] Note: Low crystallinity in the table means that the test product has poor crystallinity and uneven particles; pure phase means that the test product is the target product, with uniform particles and uniform particle size.

[0048] In this example, by investigating the research on the synthesis of analcime at different crystallization temperatures, it was found that 160° C. is the optimum temperature for nucleation and growth of analcime crystals, and the obtained analcime crystals have high crystallinity, uniform particles, and uniform particle size.

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
particle sizeaaaaaaaaaa
crystal sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for synthesizing analcime from coal gangue through microwave hydrothermal crystallization, which comprises the following steps: firstly, activating the coal gangue through CaO ball milling, then digesting, activating and dissolving out aluminosilicate by utilizing a microwave synthesizer, and further synthesizing an analcime molecular sieve by adopting a hydrothermal method. Material selection is economical, cost is low, and high-added-value utilization of solid waste is achieved; the synthesis method is simple, synthesis is achieved through a microwave-assisted hydrothermal synthesis method, analcime is prepared through washing, centrifuging and drying, data is detailed and accurate, and the synthesis process does not pollute the environment.

Description

technical field [0001] The invention relates to a method for synthesizing analcime by microwave hydrothermal crystallization of coal gangue, which belongs to the field of coal gangue utilization and preparation of analcime. Background technique [0002] Analcite is a feldspar-like mineral with high hydrothermal stability, high selectivity and good ion exchange properties. Analcime can be used to produce ion sieves, rubber and plastic additives, soil improvers, heavy metal extractants, silicon-aluminum compounds, fungicides, special oxidants, etc. Due to its excellent properties, the synthesis and application research of analcite has been reported, so it can be seen that the analcite material has a good industrial application prospect. [0003] In 2011, Cai Kunchuan et al. (Cai Kunchuan, Li Yan, Jing Zhenzi. Research on Hydrothermal Synthesis of Analcite [J]. Science and Technology Innovation and Application, 2016(35):23-25.) used chemical silica and aluminum powder Using h...

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): C01B39/02B01J19/12
CPCC01B39/02B01J19/126B01J2219/00141C01P2002/72C01P2004/03C01P2002/88
Inventor 王永祯李琪王勇王晓敏
Owner TAIYUAN 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