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Method for production of purified coal tar pitch from high temperature coal tar

A technology for high-temperature coal tar and coal tar pitch, which is used in tar processing by distillation, tar processing by chemical extraction, petroleum industry, etc. Low insoluble matter and metal content, and the effect of increasing the added value of products

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

[0006] Chinese patent CN101074381A introduces a method for processing and utilizing coal tar, with gasoline and diesel as the target product, coal tar is not purified, and the application range of asphalt is limited

Method used

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  • Method for production of purified coal tar pitch from high temperature coal tar
  • Method for production of purified coal tar pitch from high temperature coal tar
  • Method for production of purified coal tar pitch from high temperature coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The hydrofining reaction is carried out on a double reaction tube continuous hydrogenation reaction device. Two 200ml reaction tubes can be used in series or in parallel, placed in a fixed aluminum block heating furnace, and share a set of feeding system and cooling separation system , by a computer for self-control and monitoring operations. The protection and demetallization catalyst is installed in the first reaction tube, which is used in series with the second reaction tube filled with the refined catalyst for hydrogenation refining reaction.

[0072] The hydrodemetallization catalyst described in the first reaction tube is supported by alumina, with a pore volume of 0.82ml / g and a specific surface area of ​​187.8m 2 / g, the pore diameter is 12.1nm, and the metal composition is: 15.4wt% molybdenum oxide, 2.3wt% nickel oxide. The upper part of the second reaction tube is filled with hydrofining catalyst A and the lower part is filled with refined catalyst B. Hydrof...

Embodiment 2

[0079]Mix the high-temperature coal tar shown in Table 2-1 with the hydrogenated heavy solvent and deionized water shown in Table 1 at a ratio of 1:0.5:0.5 and wash with water, then enter the centrifuge to remove most of the saline content, wash with water for 3 Second-rate. After washing, the coal tar enters the de-QI blending tank, and n-octane is added therein, and the ratio is adjusted to tar: hydrogenated heavy solvent: n-octane=1: 0.5: 0.5, and the above operating conditions are deslagging temperature 80°C, stirring Speed ​​120rpm, stirring time 5min. After stirring, the mixture enters the centrifuge, the separation factor is 2500, and the QI is removed to obtain purified clarified oil. The clarified oil is separated from water and one stage of light oil, n-octane, two stages of light oil, phenol oil, naphthalene oil, and washing oil with a distillation device. Mixed oil with hydrogenated heavy solvent and anthracene oil, purified asphalt. The properties of clarified o...

Embodiment 3

[0089] With the high-temperature coal tar shown in Table 2-1 and the hydrogenated heavy solvent obtained in Example 2, deionized water is fully mixed with 1: 0.75: 3 and washed with water and enters the centrifuge to remove most of the saline content therein. Wash 1 time with water. After washing, the coal tar enters the QI-removing compounding tank, and n-octane is added therein, and the ratio is adjusted to tar: hydrogenated heavy solvent: n-octane=1: 0.75: 0.75, and the QI is removed under the conditions of Example 2 to obtain purification The clarified oil, the clarified oil is separated from water and one stage of light oil, n-octane, two stages of light oil, phenol oil, naphthalene oil, mixed oil of wash oil and hydrogenated heavy solvent anthracene oil and purified asphalt by distillation device, purified asphalt analysis See Table 3-1.

[0090] The mixed oil of first-stage light oil, second-stage light oil, wash oil, hydrogenated heavy solvent and anthracene oil is us...

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Abstract

The invention relates to a method for production of purified coal tar pitch from high temperature coal tar. The method includes: mixing the high temperature coal tar with a hydrogenation heavy solvent and deionized water, and then removing salt to obtain salt removed high temperature coal tar; mixing the salt removed high temperature coal tar with an aliphatic solvent, and then removing quinoline insolubles to obtain clarified oil; distilling the clarified oil to obtain the aliphatic solvent, phenol oil, naphthalene oil, purified coal tar pitch and mixed oil of light oil, washing oil, anthracene oil and the hydrogenation heavy solvent, and taking the mixed oil as catalytic hydrogenation feed oil; subjecting the catalytic hydrogenation feed oil to catalytic hydrofining to obtain hydrofined oil; distilling the hydrofined oil to obtain a naphtha component, a gasoline blending component, a diesel oil blending component and the hydrogenation heavy solvent. The method greatly enhances the added value of products processed from high temperature coal tar, and the purified asphalt has low content of quinoline insolubles and metals.

Description

technical field [0001] The invention relates to the field of novel carbon materials, in particular to a method suitable for producing and purifying coal tar pitch from high-temperature coal tar on an industrial scale. 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. The output of coal tar recovered from coking gas is 18 million tons, and the coal tar pitch extracted from coal tar can reach 9 million tons. [0003] The technical route of China's high-temperature coal tar processing is similar, basically based on tar distillation to process light oil, phenol oil, naphthalene oil, wash oil, anthracene oil, and asphalt. However, the main problem brought about by this kind of processing line is serious environmental pollution, asphalt has no good market, and can only produce low-value-added medium-temperature...

Claims

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Application Information

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IPC IPC(8): C10C1/20C10C1/04C10C1/12C10G67/02C10G45/08
Inventor 赵宏美邱介山萧锦诚李正秋
Owner 易高碳材料控股(深圳)有限公司
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