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

Binary surface-to-surface adsorption type dispersing agent for slurry forming of low-rank coal and preparation method of dispersing agent

A binary surface-to-surface, adsorption-type technology, applied in fuel additives, liquid carbon-containing fuels, petroleum industry, etc., can solve problems such as inapplicable low-rank coal pulping

Active Publication Date: 2021-08-03
SHAANXI UNIV OF SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional coal-water slurry dispersants are effective in high-rank coal slurrying, but not suitable for low-rank coal slurrying

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
  • Binary surface-to-surface adsorption type dispersing agent for slurry forming of low-rank coal and preparation method of dispersing agent
  • Binary surface-to-surface adsorption type dispersing agent for slurry forming of low-rank coal and preparation method of dispersing agent
  • Binary surface-to-surface adsorption type dispersing agent for slurry forming of low-rank coal and preparation method of dispersing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of a binary surface adsorption type dispersant for non-stick coal slurrying, comprising the following steps:

[0053] Step 1), after acidifying 5g waste graphite with 25g concentrated HCl, washing with water and drying, get pretreated graphite, NaNO 3 and Concentrated H 2 SO 4 Mass ratio 1:1:40 was added to a dry three-necked flask, and stirred at 0°C for 0.5h. Slowly add KMnO with twice the mass of graphite several times while controlling the temperature of the reaction system below 5°C 4 , to be KMnO 4 After all the addition, react at a low temperature at 0°C for 2 hours, then raise the temperature to 35°C for a medium temperature reaction, react for 2 hours, and finally slowly add distilled water with a mass of 60wt% of the total mass of the current system into the system, and perform a high temperature reaction at 85°C. 1h. After the reaction is completed, add distilled water and H 2 o 2 (mass fraction is 30%), until the color of the solu...

Embodiment 2

[0057] Example 2 Preparation method of binary surface adsorption type dispersant for non-stick coal slurry

[0058] Step 1), after acidifying 5g waste graphite through 40g concentrated HCl, washing with water, drying, get pretreated graphite, NaNO 3 and Concentrated H 2 SO 4 Mass ratio 1:1:41 was added to a dry three-necked flask, and stirred at 3°C ​​for 1h. Slowly add KMnO with a mass 2.5 times the mass of graphite multiple times while controlling the temperature of the reaction system below 5°C 4 , to be KMnO 4 After all the addition, stir at 5°C for low temperature reaction for 2.5h, then raise the temperature to 40°C for medium temperature reaction, react for 2.5h, and finally slowly add distilled water with a total mass of 70wt% of the system into the system, and perform high temperature reaction at 90°C for 1h . After the reaction is completed, add distilled water and H 2 o 2 (mass fraction is 30%), until the color of the solution turns bright yellow, filter whil...

Embodiment 3

[0061] Example 3 Preparation method of binary surface adsorption type dispersant for non-stick coal slurry

[0062] Step 1), after acidifying 5g waste graphite through 30g concentrated HCl, washing with water, drying, get pretreated graphite, NaNO 3 and Concentrated H 2 SO 4 Mass ratio 1:1.05:41 was added to a dry three-necked flask, and stirred at 0°C for 0.5h. Control the temperature of the reaction system below 5°C and slowly add KMnO with a mass 3 times that of graphite several times 4 , to be KMnO 4 After all the addition, stir at 0°C for low temperature reaction for 2.5h, then raise the temperature to 40°C for medium temperature reaction, react for 2h, and finally slowly add distilled water with a total mass of the system of 65wt% into the system, and perform high temperature reaction at 85°C for 1.5h . After the reaction is completed, add distilled water and H 2 o 2 (mass fraction is 30%), until the color of the solution turns bright yellow, filter while hot, and...

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
Apparent viscosityaaaaaaaaaa
Apparent viscosityaaaaaaaaaa
Apparent viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a binary surface-to-surface adsorption type dispersing agent for slurry forming of low-rank coal and preparation method of the dispersing agent, belonging to the field of dispersing agent. The preparation method comprises the steps that firstly, graphite is oxidized to obtain graphite oxide; then a carboxyl group on the edge of the graphite oxide is sequentially subjected to acylating chlorination and esterification; and then hydrophilic chains are grafted through an emulsion polymerization method so as to obtain the surface-to-surface adsorption type dispersing agent for slurry forming of low-rank coal. The dispersing agent has a central hydrophobic anchoring group similar to the surface structures of non-caking coal, sub-bituminous coal and lignite, so the dispersing agent can realize surface-to-surface adsorption with the surfaces of the non-caking coal, the sub-bituminous coal and the lignite through pi-pi effect, a hydrogen bond and a hydrophobic effect, and adsorption acting force and an adsorption area are relatively large. A hydrophilic chain is introduced into the structure of the dispersing agent, so the dispersing agent can effectively improve the interface structure of coal and water, reduce the polarity interaction energy of the interface, enhance the electrostatic repulsion and steric hindrance among coal particles and inhibit coal aggregation and moisture adsorption, thereby improving the slurrying performance of low-rank coal.

Description

technical field [0001] The invention belongs to the field of dispersants, and relates to a binary surface-adsorption type dispersant for low-rank coal slurrying and a preparation method thereof. Background technique [0002] Non-caking coal, sub-bituminous coal and lignite are coals with a low degree of metamorphism that have been oxidized in the early stage of coal formation. Because of their high water content and high oxygen content, they have the characteristics of low calorific value and are mainly used for gasification and power generation. Coal can also be used as power and civil fuel. Because of its high efficiency and environmental protection, coal water slurry is considered to be one of the important ways to realize the efficient and clean utilization of coal in my country. Coal water slurry technology is also the main means of coal gasification at present. The preparation of high-quality coal-water slurry from non-caking coal, sub-bituminous coal and lignite has ...

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): C08F292/00C08F220/06C08F216/14C08G83/00C10L1/32C10L10/18C10L1/198C10L1/196C10L1/195
CPCC08F292/00C08G83/001C10L1/326C10L10/18C10L1/1955C10L1/1963C10L1/198C08F220/06C08F216/1433
Inventor 张康侯妍王晨杨晓武代方方
Owner SHAANXI UNIV OF SCI & TECH
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