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

Preparation method of expanded graphite

A technology of expanded graphite and flake graphite, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of continuous production of graphite and long production cycle of expanded graphite, and achieve complete graphite oxidation and short production cycle Short, easy-to-step effects

Inactive Publication Date: 2017-05-17
北京鼎臣石墨科技有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For this reason, what the present invention is to solve is the problem that the existing expanded graphite production cycle is long and it is difficult to realize the continuous production of graphite

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
  • Preparation method of expanded graphite
  • Preparation method of expanded graphite
  • Preparation method of expanded graphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The present embodiment provides a kind of preparation method of expanded graphite, comprises the steps:

[0038] S1. Add the first mixed solution to flake graphite, stir and react at 30°C and 100r / min for 3min, and then stir and react at 300r / min for 17min to obtain the first mixed system; the first mixed solution includes sodium chlorate and perchloric acid ; The flake graphite is 30 orders.

[0039] The ratio of the flake graphite, the sodium chlorate, and the perchloric acid mixed solution is 3g: 3g: 4mL.

[0040] The first mixing system was subjected to the step of ultrasonic vibration for 7 minutes for the first time, and the ultrasonic power was 600w.

[0041] S2. Add a second mixed solution into the first mixed system, and stir and react at 30°C and 300r / min for 10 minutes to obtain a second mixed system; the second mixed solution includes potassium permanganate and perchloric acid;

[0042]The ratio of the potassium permanganate to the perchloric acid in the s...

Embodiment 2

[0049] The present embodiment provides a kind of preparation method of expanded graphite, comprises the steps:

[0050] S1. Add the first mixed solution to flake graphite, stir and react at 45°C and 80r / min for 3min, and then stir and react at 350r / min for 12min to obtain the first mixed system; the first mixed solution includes sodium chlorate and perchloric acid ; The flake graphite is 35 orders

[0051] The ratio of the flake graphite, the sodium chlorate, and the perchloric acid mixed solution is 2g:2g:6mL.

[0052] The first mixing system was subjected to the step of ultrasonic vibration for 5 minutes for the first time, and the ultrasonic power was 800w.

[0053] S2. Add a second mixed solution into the first mixed system, and stir and react at 20° C. and 350 r / min for 15 minutes to obtain a second mixed system; the second mixed solution includes potassium permanganate and perchloric acid;

[0054] The ratio of the potassium permanganate to the perchloric acid in the s...

Embodiment 3

[0060] The present embodiment provides a kind of preparation method of expanded graphite, comprises the steps:

[0061] S1. Add the first mixed solution to flake graphite, stir and react at 20°C and 120r / min for 1min, and then stir and react at 280r / min for 34min to obtain the first mixed system; the first mixed solution includes sodium chlorate and perchloric acid ; The flake graphite is 20 orders.

[0062] The ratio of the flake graphite, the sodium chlorate, and the perchloric acid mixed solution is 4g: 0.1g: 1mL.

[0063] The first mixing system was subjected to the first step of ultrasonic vibration for 10 minutes, and the ultrasonic power was 500w.

[0064] S2. Add a second mixed solution into the first mixed system, and stir and react at 45°C and 280r / min for 5 minutes to obtain a second mixed system; the second mixed solution includes potassium permanganate and perchloric acid;

[0065] The ratio of the potassium permanganate to the perchloric acid in the second mixe...

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
Expansion ratioaaaaaaaaaa
Expansion ratioaaaaaaaaaa
Expansion ratioaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of new materials, and particularly provides a preparation method of expanded graphite. The preparation method comprises the following steps: adding a first mixed solution into crystalline flake graphite, and performing stirring reaction at 20-45 DEG C for 15-35 minutes to obtain a first mixed system, wherein the first mixed solution comprises sodium chlorate and perchloric acid; adding a second mixed solution into the first mixed system, and performing stirring reaction at 20-45 DEG C for 5-15 minutes to obtain a second mixed system, wherein the second mixed solution comprises potassium permanganate and perchloric acid; filtering the second mixed system to obtain solids, and washing until a washing solution is neutral to obtain a primary product; and burning the primary product at 850-1100 DEG C until the volume does not change any more to obtain the expanded graphite. According to the preparation method of expanded graphite, the expanded graphite is prepared through a multi-step intercalation method, so that the oxidation is more thorough, the intercalation efficiency is higher, and the expansion multiplying power of the prepared expanded graphite can be up to 500-800 ml / g. The preparation method has the advantages of simple steps and short production cycle, can realize continuous reaction and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a preparation method of expanded graphite. Background technique [0002] Expanded graphite, as an intermediate product in the manufacture of flexible graphite, is a loose and porous worm-like substance obtained from natural flake graphite through oxidation, acidification intercalation, water washing, drying, and high-temperature treatment, also known as graphite worm. [0003] Expanded graphite not only has the excellent properties of natural graphite itself such as heat resistance, corrosion resistance, electrical conductivity, thermal conductivity, and self-lubrication, but also has properties such as light weight, softness, compressibility, and resilience that natural graphite does not have. Therefore, in sealing In the field, expanded graphite materials have better performance and uses than asbestos, rubber and other materials. [0004] Various strips, plates and sheets made of ...

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): C01B32/225
CPCC01P2002/82C01P2004/03
Inventor 王三胜
Owner 北京鼎臣石墨科技有限公司
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