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

A kind of preparation method of modified asphalt

A technology of modified asphalt and coal tar pitch, which is applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, tar processing through heat treatment, petroleum industry, etc. Improve the softening point and viscosity of high-quality asphalt, and the poor quality of electrode materials, etc., to achieve the effects of long life, increased fixed carbon content, and improved mechanical strength and electrical conductivity

Active Publication Date: 2016-01-20
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that α-resin is also generated during the preparation of modified asphalt in the prior art, which will easily lead to an increase in the softening point and viscosity of the modified asphalt, and a deterioration in fluidity, which in turn leads to the deterioration of the modified asphalt and bone. The materials cannot be tightly combined, so that the quality of the prepared electrode material is poor and the service life is short, thereby providing a method for preparing modified pitch with low softening point and viscosity, good fluidity, and high fixed carbon content

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 modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 1000g of coal tar and 30g of free carbon evenly, and heat and react at 360°C for 8 hours to obtain modified pitch A;

[0023] Wherein, the preparation method of described free carbon is as follows:

[0024] Under the condition of 50°C, fully mix coal tar and solvent to obtain a mixed solution, and then perform centrifugation under a centrifugal force of 2000g to remove insoluble matter in the mixed solution, and the obtained insoluble matter is free carbon, which is centrifuged The viscosity of the mixed solution is 40mpa·s;

[0025] The solvent is anthracene oil, and the mass ratio of the anthracene oil to the coal tar is 10.

Embodiment 2

[0027] Mix 1000g of coal tar and 50g of free carbon evenly, heat and react at 365°C for 7 hours to obtain modified pitch B;

[0028] Wherein, the preparation method of described free carbon is as follows:

[0029] Under the condition of 60°C, the composition containing free carbon and the solvent are fully mixed to obtain a mixed solution, which is centrifuged under a centrifugal force of 2500g to remove insoluble matter in the mixed solution, and the centrifuged mixture is obtained The viscosity is 45mpa s;

[0030] The solvent is washing oil; the mass ratio of the washing oil to the asphalt is 9;

Embodiment 3

[0032] Mix 1000g of coal tar and 100g of free carbon evenly, heat and react at 370°C for 6 hours to obtain modified pitch C;

[0033] Wherein, the preparation method of described free carbon is as follows:

[0034] Under the condition of 70°C, fully mix the coal tar pitch and the solvent to obtain a mixed solution, and carry out centrifugation under a centrifugal force of 3000g to remove insoluble matter in the mixed solution, and the viscosity of the mixed solution subjected to centrifugation is 40mpa s;

[0035] The solvent is quinoline, and the mass ratio of the quinoline to the pitch is 8.

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing modified asphalt, which belongs to the technical field of asphalt preparation. The method comprises the following steps: uniformly mixing coal tar or coal tar pitch with free carbon or components containing free carbon, heating and reacting to obtain modified pitch. The modified asphalt prepared by the method for preparing the modified asphalt of the present invention has the advantages of low viscosity and softening point, high fluidity and high fixed carbon content. In addition, by adding components containing free carbon, the density of the modified pitch increases, so the prepared modified pitch also has the advantage of high density.

Description

technical field [0001] The invention relates to a preparation method of modified asphalt, which belongs to the technical field of asphalt preparation. Background technique [0002] With the development of carbon technology, in order to produce high-performance carbon products, such as high-power and ultra-high-power graphite electrodes, high-density and high-strength graphite, high-temperature molded carbon bricks and microporous carbon bricks, more requirements have been put forward for the performance of coal tar pitch. high demands. Modified asphalt is a high-performance asphalt obtained by modifying coal tar pitch under certain conditions. Compared with medium temperature coal tar pitch, the content of β resin in modified pitch is greatly increased. After roasting, most of the β-resin in the modified pitch will be converted into coke, which increases the fixed carbon content of the modified pitch. When the fixed carbon content is increased, the bulk density, mechanica...

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): C10C1/19C10C3/00
Inventor 任相坤井口宪二坂脇弘二崔永君
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD