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A purification method of high softening point and high quinoline insoluble coal-based bitumen

A high softening point, quinoline technology, used in the processing of tar pitch/petroleum pitch/natural pitch, chemically processing tar pitch/petroleum pitch/natural pitch, processing tar pitch/petroleum pitch/natural pitch by distillation, etc. , can solve the problem of no better purification method, and achieve the effect of reducing production cost, improving extraction rate and improving purification level.

Active Publication Date: 2021-07-23
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For asphalt with high softening point and high quinoline insolubles, there is no better purification method

Method used

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  • A purification method of high softening point and high quinoline insoluble coal-based bitumen
  • A purification method of high softening point and high quinoline insoluble coal-based bitumen
  • A purification method of high softening point and high quinoline insoluble coal-based bitumen

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Experimental program
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Effect test

Embodiment

[0028] The coal tar wash oil fraction (DMNO for short) and the purified coal tar soft pitch (RP for short) are added in a certain proportion to the extractant preparation tank and mixed evenly, as the extractant of HQRP. Add the extractant and HQRP into the extraction tank according to a certain ratio, and stir at a certain temperature for a certain period of time. After the stirring is finished, the mixture in the extraction tank is sent to a centrifuge for centrifugal separation. After the separation, the centrifugal liquid is distilled at atmospheric pressure, and the DMNO with a distillation range of 220-280°C is cut from the top, and the quality of the DMNO obtained by the distillation is controlled to be equal to the quality of the DMNO put into the HDR; the product at the bottom of the distillation tower is RHQRP, which is weighed And carry out QI content analysis. Purification yield=(RHQRP quality-RP quality) / HQRP quality, the results are shown in the following table:...

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Abstract

The invention discloses a method for purifying coal-based pitch with high softening point and high quinoline insolubles. Coal tar wash oil fraction and purified coal tar soft pitch are added into an extractant preparation tank in a mass ratio of 100:3-15 and mixed evenly , as the extractant of high softening point high quinoline insoluble pitch (HQRP); by the mass ratio of 2-4:1, the extractant and HQRP are added to the extraction tank, stirred evenly at 60-80°C; after the stirring, The mixture in the extraction tank is sent to a centrifuge for centrifugation, and the obtained centrifugate is sent to a distillation tower to recover the washing oil fraction for reuse. The invention greatly improves the extraction rate of HQRP by compounding the solvent, and at the same time, the production cost can be greatly reduced by using the compound solvent.

Description

technical field [0001] The present invention relates to a kind of purification technology of pitch with high softening point and high quinoline insoluble matter (referred to as HQRP). By applying this technology to purify this kind of pitch, it is possible to obtain pitch with quinoline insoluble matter content (abbreviated as QI) lower than 0.1%. The asphalt is purified, and the production device can operate stably, and the obtained asphalt can be used for the preparation of high value-added carbon products such as needle coke and spinning pitch. Background technique [0002] The typical representative of HQRP is coal direct liquefaction residue. Its typical characteristics are: the content of quinoline insolubles is more than 30%, and the softening point is higher than 180°C, while the softening point of coal tar medium temperature pitch is 85°C, and the content of quinoline insolubles less than 10%. With the development of high-end carbon materials such as needle coke an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C3/00C10C3/02C10C3/06
CPCC10C3/00C10C3/02C10C3/06
Inventor 许祥军
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD