Method for preparing mesophase asphalt by coal liquefaction residue

A technology of coal liquefaction residue and mesophase pitch, which is applied in the field of coal deep processing, can solve the problems that the liquefaction residue cannot obtain the most favorable target product, the liquefaction residue cannot be fully utilized, and affects the economics of coal liquefaction, etc., and achieve coal utilization. And the effect of increasing added value, improving coal economy, and expanding the scope

Active Publication Date: 2009-11-18
CHINA COAL RES INST +1
View PDF3 Cites 97 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon-hydrogen ratio of the liquefaction residue is high, and direct combustion not only affects the economics of coal liquefaction, but also the sulfur content in the residue obtained by the liquefaction process using sulfur-iron-based catalysts is very high, and direct combustion is contrary to the liquefaction process as a clean coal The original intention of technology
Converting the asphaltenes i

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, 1000kg of coal liquefaction residue is pulverized and sieved to obtain coal liquefaction residue powder with a particle diameter below 3mm, and then the coal liquefaction residue powder is dried to make its moisture content ≤ 3%.

[0022] Then add 10kg of dried coal liquefaction residue powder and 40kg of extraction solvent N,N-dimethylacetamide into the stirring tank, then heat up to 120°C, stir for 60 minutes to obtain the mixture, and vacuum filter the coal liquefaction residue The mixture with the solvent was suction-filtered to obtain the extract, and the extraction rate of the soluble matter was detected to be 50.12% (daf).

[0023] The extract is sent to the evaporator for heating and evaporation, and the extraction solvent in the extract is evaporated to produce refined coal liquefied oil pitch. The evaporated extraction solvent vapor is cooled by the condenser to form an extraction solvent for reuse.

[0024] Put the coal liquefied oil asphalt into ...

Embodiment 2

[0026] The preparation process of this example is the same as that of Example 1, except that the mixture is stirred for 10 minutes at a temperature of 120° C., and the solvent is recovered after vacuum filtration to obtain coal liquefied oil pitch. The extraction rate of soluble matter was detected to be 59.30% (daf).

Embodiment 3

[0028] The present embodiment preparation process is identical with embodiment 1, difference is that 30kg furfural replaces. Stir at a temperature of 20°C for 60 minutes, and recover the solvent after vacuum filtration to obtain coal liquefied oil pitch. The extraction rate of soluble matter was detected to be 46.12% (daf).

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
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing mesophase asphalt by coal liquefaction residue. In the method, the coal liquefaction residue is ground, screened and dried, and is extracted at certain temperature for certain time by using organic solvent as extracting solvent; the extracted mixed liquor is filtered, purified and evaporated; the extracting solvent in the extract liquor is evaporatedto obtain refined coal liquefaction oil asphalt, thus obtaining the mesophase asphalt by charring for 4-10 hours in a high-pressure autoclave under the conditions of 410-460 DEG C, 3-4MPa of constantpressure and stirring. The method has simple process and convenient and safe operation, the mesophase asphalt with high quality is prepared and can be used as raw materials of high power and ultra high power graphite electrode, carbon fiber and the like.

Description

technical field [0001] The invention relates to the field of coal deep processing, in particular to a method for preparing mesophase pitch from coal liquefaction residue with simple process, convenient operation and high quality. Background technique [0002] With the rapid and steady development of the economy and the continuous improvement of people's living standards, my country's demand for energy, especially for oil, has entered a period of rapid growth. my country's primary energy resources are characterized by "more coal, less oil and less natural gas". my country has transformed from an oil exporter to a major importer of oil and natural gas. Importing a large amount of crude oil not only increases the dependence on foreign resources, but also the fluctuations and changes in the international oil market directly affect my country's economic development and energy supply security. Therefore, making full use of abundant coal resources and vigorously developing coal-to...

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): C10C3/04
Inventor 李克健李文博吴秀章朱晓苏盛英李丽史士东谷小会高振楠石智杰颜丙锋
Owner CHINA COAL RES INST
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