Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of environment-friendly modified coal tar pitch

A kind of coal tar pitch, environment-friendly technology, applied in the processing of tar pitch/petroleum pitch/natural pitch, processing of tar pitch/petroleum pitch/natural pitch, petroleum industry, etc., can solve the problem of reducing the performance of coal pitch, coal Oxidation and aging of asphalt and other problems, to achieve the effect of improved performance, low price, simple and easy operation of the device

Active Publication Date: 2018-11-13
TAIYUAN UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is to fully freeze the coal tar pitch at a brittle temperature, and then pulverize it to obtain asphalt powder less than 80 meshes, add the pitch powder to the potassium permanganate solution at room temperature, keep the stirring speed, and react for 180 minutes. The reduction rate of benzo[a]pyrene content in modified coal tar pitch is more than 65%. However, since the modifier uses highly oxidizing potassium permanganate, it is very easy to cause premature oxidation and aging of coal tar pitch during the modification process, thereby reducing Properties of coal tar pitch

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
  • A kind of preparation method of environment-friendly modified coal tar pitch
  • A kind of preparation method of environment-friendly modified coal tar pitch
  • A kind of preparation method of environment-friendly modified coal tar pitch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 5.00g coal tar pitch, 5% catalyst potassium bisulfate were uniformly mixed, and at the same time, 50mL solvent cyclohexane and 6% modifier 10-undecenal were added, and the mixture was stirred and reacted at 50°C for 4 hours. The content indicators of polycyclic aromatic hydrocarbons in the modified coal tar pitch are as follows:

[0022] Table 1

[0023]

Embodiment 2

[0025] 5.00g coal tar pitch, 5% catalyst potassium bisulfate were uniformly mixed, and at the same time, 50mL solvent cyclohexane and 8% modifier 10-undecenal were added, and the mixture was stirred and reacted at 50°C for 4 hours. The content indicators of polycyclic aromatic hydrocarbons in the modified coal tar pitch are as follows:

[0026] Table 2

[0027]

[0028] Referring to national standards GB / T 4507-1999, GB / T 2292-1997, GB / T 2293-1997, GB / T 8727-2008, the softening point of coal tar pitch before and after modification, toluene insoluble matter, quinoline insoluble matter, coking The specific values ​​of coal tar pitch softening point before and after modification, toluene insoluble matter, quinoline insoluble matter and coking value were measured and compared in Table 3.

[0029] table 3

[0030]

Embodiment 3

[0032] 5.00g coal tar pitch, 5% catalyst potassium bisulfate were uniformly mixed, and at the same time, 50mL solvent cyclohexane and 10% modifier 10-undecenal were added, and the mixture was stirred and reacted at 50°C for 4 hours. The content indicators of polycyclic aromatic hydrocarbons in the modified coal tar pitch are as follows:

[0033] Table 4

[0034]

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
softening pointaaaaaaaaaa
softening pointaaaaaaaaaa
Login to View More

Abstract

A preparation method of environmentally friendly modified coal tar pitch comprises the steps that medium-temperature coal tar pitch and a potassium hydrogen sulfate catalyst are mixed evenly, meanwhile an aprotic organic solvent low in boiling point and easy to recover and a 10-undecenal modifier are added to make the mixture fully dissolved, continuous stirring is performed at a certain rotation speed, and reflux condensation reaction is performed at the temperature of 30-70 DEG C for 1-8 hours; after reaction is completed, the aprotic organic solvent low in boiling point and easy to recover is recovered, aeration drying is conducted on the obtain solid substance for 24 hours, namely the environmentally friendly modified coal tar pitch is obtained. The operation process is simple, the usage amount of the modifier is small, the usage amount of the catalyst is also small, the reaction temperature is low, the solvent can be recycled, and the industrial production cost is low. The total content of 16 types of emphasized toxic polycyclic aromatic hydrocarbons, detected by coal tar pitch American EPA, in the coal tar pitch after modification is greatly reduced, and medium-temperature coal tar pitch is modified into low-temperature coal tar pitch.

Description

technical field [0001] The invention relates to a preparation method of an environment-friendly modified coal tar pitch, and the specific method is a preparation method of an environment-friendly coal tar pitch using 10-undecenal as a modifier. technical background [0002] China is the country with the largest production and consumption of metallurgical coke in the world. The National Bureau of Statistics announced that China's coke production in 2014 was 476 million tons. Calculated on the basis of about 5% coal tar by-product per ton of coke, China’s annual output of high-temperature coal tar can reach more than 20 million tons. Calculated on the basis of 50-60% yield, coal tar processing enterprises can produce high-temperature coal tar pitch (hereinafter referred to as Coal tar pitch) can reach more than 10 million tons, and the price is low. Except for a small number of these by-product coal tar pitches that are used as electrode pitch binders and carbon materials, mos...

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 Patents(China)
IPC IPC(8): C10C3/02
CPCC10C3/026
Inventor 申峻王玉高冯永辉刘刚李瑞丰杜建奎杨志峰徐青柏
Owner TAIYUAN UNIV OF TECH