Process for purifying feedstocks of carbon black

A technology of tar and crude coal, which is applied in the field of refining carbon black raw material oil, can solve the problems of environmental safety hazards, increase operating costs, increase the amount of extraction solvent, etc., and achieve the effect of low cost and low energy consumption

Active Publication Date: 2005-11-23
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the extraction efficiency and reduce the filtration viscosity (easy to filter), it is necessary to increase the amount of extraction solvent, thereby increasing the operating cost
In addition, thermal filtration operations present safety hazards both to the operator and to the environment

Method used

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  • Process for purifying feedstocks of carbon black
  • Process for purifying feedstocks of carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The crude coal tar (1) provided by a factory (see Table 1 for its main physical parameters) and the positive solvent composed of 50wt% benzene, 20wt% toluene and 30wt% α-methylnaphthalene are placed in the container, and the crude coal tar (1) The weight ratio with the forward solvent is 1: 0.2. After 0.5 hours, add 20wt% ethanolamine, 50wt% acetone, 20wt% isopropanol and 10wt to the above-mentioned crude coal tar (1) and the forward solvent mixed solution The reverse solvent composed of % styrene, the weight ratio of crude coal tar (1) to the reverse solvent is 1:0.05. Keep the temperature at 30°C and the pressure at 0.1Mpa for 0.5 hours, and obtain refined coal tar (1) after solid-liquid separation. Refined coal tar (1) was analyzed by laser particle size scattering, and the results are shown in Table 2.

[0022] Carbon black oil (crude coal tar)

(1)

(2)

relative density d 50 / 4

1.16

1.16

Asphalt wt%

6.7...

Embodiment 2

[0026] The crude coal tar (2) provided by a factory (see Table 1 for its main physical parameters) and the positive solvent composed of 30wt% benzene, 50wt% toluene and 20wt% β-methylnaphthalene are placed in the container, and the crude coal tar (2) The weight ratio with the forward solvent is 1: 2. Add 15wt% ethanolamine, 50wt% acetone, 15wt% isopropanol and 20wt% ethanolamine to the above-mentioned crude coal tar (2) and forward solvent mixed solution after 1 hour The reverse solvent composed of % styrene, the weight ratio of crude coal tar (2) to the reverse solvent is 1:0.5. Keep the temperature at 50°C and the pressure at 0.2Mpa for 2 hours, and obtain refined coal tar (2) after solid-liquid separation. Refined coal tar (2) was analyzed by laser particle size scattering, and the results are shown in Table 3.

[0027] Table 3. Comparison of main quality indicators of crude coal tar (2) before and after refining and with ethylene tar

[0028]

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Abstract

The invention discloses a process for purifying feedstocks of carbon black which mainly comprises, charging forward dissolvent comprising benzene, toluene and alpha-methylnaphthalene or beta-methylnaphthalene into crude coal tar, wherein the weight ratio of the crude coal tar and the forward dissolvent is 1:0.1-3, after 0.5-1 hour, charging backward dissolvent comprising aminoethyl alcohol, propanone, alcohol isopropylicum and phenylethene into the miscible liquid of the crude coal tar and the forward dissolvent, wherein the weight ratio of the crude coal tar and the backward dissolvent is 1:0.05-0.5, at the temperature of 10-60 deg. C, pressure 0.1-0.1Mpa, sustaining 0.5-2 hours, carrying out solid-liquid separation to obtain the refined coal tar.

Description

technical field [0001] The invention relates to a method for refining carbon black raw material oil, in particular to a method for removing asphalt from crude coal tar. Background technique [0002] Raw oils for the preparation of carbon black are mainly divided into three categories: catalytic cracking decant oil (DO), ethylene tar (ET) and crude coal tar (CT). Raw oil for the production of carbon black. However, due to the high content of pitch in CT, if it is not treated, it will affect the quality of carbon black products. [0003] The existing method for removing asphalt from crude coal tar is: first use a solvent for forward extraction, and then perform hot filtration. In order to improve the extraction efficiency and reduce the filtration viscosity (to facilitate filtration), it is necessary to increase the amount of extraction solvent, thereby increasing the operating cost. In addition, thermal filtration operations present safety hazards both to the operator and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/18
Inventor 周霞萍刘东玉秦松波
Owner EAST CHINA UNIV OF SCI & TECH
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