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Method for preparation of activated carbon from carbon-rich residue of high temperature coal tar or coal tar pitch

A technology for high-temperature coal tar and coal tar pitch, which is applied in the directions of coking carbon-containing materials, chemical instruments and methods, coke ovens, etc. , The effect of easy control of parameters and easy operation

Active Publication Date: 2013-07-17
易高碳材料控股(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, the current literature and patents mainly focus on the removal of QI by the solvent method and the research on the purification of coal tar or coal tar pitch, and do not involve the research and utilization of the carbon-rich residue rich in QI components. question

Method used

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  • Method for preparation of activated carbon from carbon-rich residue of high temperature coal tar or coal tar pitch

Examples

Experimental program
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Effect test

Embodiment 1

[0046]Add a certain proportion of n-octane and hydrotreated coal tar to the high-temperature coal tar with a boiling point range of 300-360 ° C, so that the volume ratio of the three is coal tar: n-octane: coal tar after hydrotreating The fraction with a boiling point ranging from 300 to 360° C. = 1:0.5:0.5 was separated into a centrifuge at a temperature of 80° C. for 2 minutes, and the separation factor was 2000 to obtain a residue rich in quinoline insolubles and toluene insolubles. Under air atmosphere conditions, the temperature was raised to 200°C at a heating rate of 0.1°C / min, and the temperature was kept constant for 1 hour, and the residue was pre-oxidized, and the pre-oxidized residue was ground to 80 mesh powder; at 20°C, according to the pre-oxidation treatment The mass ratio of oxidation residue powder to KOH is 1: 4. Immerse the powder in KOH saturated solution at this temperature while adding ethanol with 10% volume of KOH saturated solution, and stir for 6 hour...

Embodiment 2

[0049] Add a certain proportion of naphtha and washing oil to the high-temperature coal tar, so that the volume ratio of the three is coal tar: naphtha: washing oil = 1: 0.4: 0.4, enter the centrifuge at a temperature of 60 ° C for 4 minutes, separate With a factor of 5000, a residue rich in quinoline insolubles and toluene insolubles was obtained. Under air atmosphere conditions, the temperature was raised to 300°C at a heating rate of 5°C / min, and the temperature was kept constant for 1 hour, and the residue was pre-oxidized, and the pre-oxidized residue was ground to 120 mesh powder; at 40°C, according to the pre-oxidation treatment The mass ratio of oxidation residue powder to KOH is 1: 3. Immerse the powder in KOH saturated solution at this temperature and add ethanol with 20% volume of KOH saturated solution at the same time, stir for 12 hours. After stirring, dry at a temperature of 160° C.; The dried material was heated up to 500°C at 10°C / min under nitrogen protection...

Embodiment 3

[0052] A high-temperature coal tar pitch with a softening point of 40°C is crushed to <2mm, and a certain proportion of n-heptane and toluene is added so that the volume ratio of the three is coal tar pitch:n-heptane:toluene=1:1:2, at 60°C Enter the centrifuge for separation at low temperature for 5 minutes, the separation factor is 5000, and the residue rich in quinoline insolubles and toluene insolubles is obtained. Under air atmosphere conditions, the temperature was raised to 300°C at a heating rate of 5°C / min, and the temperature was kept constant for 1h, and the residue was pre-oxidized, and the pre-oxidized residue was ground to 240 mesh powder; at 60°C, according to the pre-oxidation treatment The mass ratio of oxidation residue powder to KOH is 1:3, impregnate the powder in KOH saturated solution at this temperature and add 5% ethanol of KOH saturated solution volume at the same time, stir for 12 hours, after stirring, dry at a temperature of 100°C; The dried material...

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Abstract

The invention relates to a method for preparation of high specific surface area activated carbon from carbon-rich residue obtained from high temperature coal tar or coal tar pitch. The carbon-rich residue mainly comprises quinoline insolubles and toluene insolubles removed from high temperature coal tar or coal tar pitch. The method includes subjecting the carbon-rich residue to pre-oxidation, grinding, dipping, drying, carbonization, activation and other processes so as to prepare an activated carbon material with a high specific surface area and a large pore volume. The invention provides a high value-added application method for the residue mainly composed of the quinoline insolubles and toluene insolubles removed from high temperature coal tar or coal tar pitch. The obtained high specific surface area activated carbon can be used in environmental protection, food processing, fine chemicals, medicines, supercapacitors and other fields.

Description

technical field [0001] The invention relates to the field of novel carbon materials, in particular to a preparation method suitable for industrial-scale activated carbon with high specific surface area. Background technique [0002] China is the world's largest producer of coke. Statistics show that the coke output in 2010 was 388 million tons, accounting for 60% of the world's coke output. Coal tar is rich in resources, and the output of coal tar recovered from coking gas is 18 million tons. [0003] China's high-temperature coal tar processing technology route is basically based on tar distillation to process light oil, phenol oil, naphthalene oil, washing oil, anthracene oil, and asphalt, and the number of products is single. In recent years, with the implementation of a 300,000-ton-scale coal tar processing project, the number of its refined chemical products has continued to increase, but asphalt contains quinoline insolubles (QI) and can only produce low-value-added m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C10B55/00C10B57/08B01J20/20B01J20/30C01B32/33C01B32/348
Inventor 赵宏美邱介山萧锦诚肖南
Owner 易高碳材料控股(深圳)有限公司
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