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

A method for preparing magnetic powder activated carbon from gasified coal tar waste residue

A technology of powdered activated carbon and tar waste residue, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., to achieve the effects of cost reduction, large processing capacity, and efficient recovery

Active Publication Date: 2018-08-21
TAIYUAN UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned publicly reported documents all use the coal tar residue discharged from the coking plant as raw material for processing and utilization, and the preparation of high value-added materials and functional materials from gasified coal tar residue has not been reported.

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 method for preparing magnetic powder activated carbon from gasified coal tar waste residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for preparing magnetic powder activated carbon from gasified coal tar waste residue includes the following contents.

[0027] 1) The separation method is to mix gasified coal tar waste residue and solvent in a certain ratio at room temperature, and the ratio of the solvent addition volume to the mass of gasified coal tar waste residue is about 2:1.

[0028] 2) Filtration or centrifugal separation after each half hour of ultrasonic vibration or stirring. The solid residue obtained by the first extraction and separation is subjected to the second extraction. The extracted solution and solid residue are separated by sedimentation, the separated solution is recovered, and the remaining solid residue separated is subjected to the third extraction. The extracted solution and solid residue are separated by sedimentation again to recover the solvent and solvent in the extraction solution. Extract the residue.

[0029] 3) Steam the extraction residue to remove the solvent,...

Embodiment 2

[0031] The method for preparing magnetic powder activated carbon from gasified coal tar waste residue includes the following contents.

[0032] 1) The described separation method is to mix gasification waste residue and solvent in a certain ratio at room temperature, and the ratio of solvent addition volume to gasification waste residue mass is about 3:1.

[0033] 2) Filtration or centrifugal separation after each half hour of ultrasonic vibration or stirring. The residue obtained by the first extraction and separation is subjected to the second extraction. The extracted solution and residue are separated by sedimentation, the separated solution is recovered, and the remaining residue separated is subjected to the third extraction, the extracted solution and residue are sedimented and separated again, and the solvent and raffinate in the separated extraction solution are recovered Scum.

[0034] 3) Steam the raffinate residue to remove the solvent, then add all the potassium hydrox...

Embodiment 3

[0036] The method for preparing magnetic powder activated carbon from gasified coal tar waste residue includes the following contents.

[0037] 1) The described separation method is to mix the gasification waste residue and the solvent in a certain ratio at room temperature, and the ratio of the added volume of the solvent to the mass of the gasification waste residue is about 2:1.

[0038] 2) Filtration or centrifugal separation after each half hour of ultrasonic vibration or stirring. The residue obtained by the first extraction and separation is subjected to the second extraction. The extracted solution and residue are separated by sedimentation, the separated solution is recovered, and the remaining residue separated is subjected to the third extraction, the extracted solution and residue are sedimented and separated again, and the solvent and raffinate in the separated extraction solution are recovered Scum.

[0039] 3) Steam the raffinate residue to remove the solvent, then a...

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
iodine adsorption valueaaaaaaaaaa
heating valueaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a method for preparing magnetic powdered activated carbon from gasified coal tar waste residues. The method comprises the steps that the gasified coal tar waste residues and extracting solvent are mixed, stirred and extracted to obtain a mixed solution, and the mixed solution is separated to obtain an extraction solution and extraction residues; the extraction solution is distilled to obtain solvent and a tar product; the extraction residues are subjected to secondary immersion cleaning with extracting solvent or recovery solvent, so that solid powder residues are obtained; the solid powder residues are added into an activating agent water solution, then water is removed to obtain a solid mixed material, and the solid mixed material is dehydrated in a pipe type furnace into which nitrogen is introduced, then heated, carbonized, and activated again in a temperature rising mode to obtain rough activated carbon; the rough activated carbon is cleaned to be neutral with distilled water and then placed into an oven to be baked, so that the magnetic powdered activated carbon is obtained. The magnetic powdered activated carbon has high magnetism, the iodine adsorption value is up to 2023.11 mg / g or above, the specific area is up to 1981.29 m<2> / g, the pore volume is 0.92 cm<3>.g-1, and the average pore diameter is 2.75 nm. In the waste water treatment process, the gasified coal tar waste residues can be well treated and utilized with high added value.

Description

Technical field [0001] The invention relates to a method for preparing magnetic powder activated carbon, in particular to a method for separating and processing gasified coal tar waste residue and preparing magnetic powder activated carbon. Background technique [0002] Gasified coal tar waste slag is the high-pressure dust-containing gas water produced when the crude gas is cooled, the low-pressure dust-containing gas water from the gas chemical section, and the low-pressure dust-containing gas water from the drive, which enter the dust-containing gas water expander together. After expanding to normal pressure, the dissolved gas in coal gas water is flashed and separated into expanded gas. The gas water enters the primary tar separator by gravity. In the tar separator, it relies on the principle of gravity sedimentation and uses the density difference of different components to divide the gas water into three layers of tar and medium oil, phenol water, tar and dust. Among them,...

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): C01B32/342C01B32/33
CPCC01P2006/42C01P2006/90
Inventor 牛艳霞王雄雷申峻盛清涛刘刚王玉高
Owner TAIYUAN UNIV OF TECH