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A full-range coal tar processing process

A processing technology and technology of coal tar, applied in the field of coal chemical industry, can solve the problems of high yield of wax oil, low naphtha and diesel oil, etc., and achieve the effect of solving short operation period and avoiding excessive cracking

Active Publication Date: 2019-11-01
BEIJING HUASHI UNITED ENERGY TECH & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, what the present invention is to solve is the defect of high wax oil yield and low naphtha and diesel oil yield in the existing coal tar processing technology, and then provides a kind of wax oil yield low, naphtha and diesel oil yield high The processing technology of full distillate coal tar

Method used

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  • A full-range coal tar processing process
  • A full-range coal tar processing process
  • A full-range coal tar processing process

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The present embodiment provides a kind of processing technology of whole distillate coal tar, such as figure 1 shown, including the following steps:

[0040] 1) Pass the full fraction coal tar into the full fraction coal tar fractionation tower 1, and conduct the first fractionation on the full fraction coal tar at normal pressure and 265° C. to obtain light coal tar with a distillation range of 60-180° C. , Medium coal tar with a distillation range of 180-230°C and heavy coal tar with a distillation range of 230-800°C;

[0041] 2) Pass the heavy coal tar into the suspension bed hydrogenation reactor 2, and react at a reaction pressure of 20Mpa, a reaction temperature of 410°C, for 0.3h -1 Under the space velocity of 1300:1 hydrogen-oil volume ratio, carry out first hydrogenation to described heavy coal tar sequentially, hydrogenation catalyst is powdery amorphous iron oxyhydroxide, and addition is 1.5wt%; And The hydrogenated product is passed into the product separa...

Embodiment 2

[0047] The present embodiment provides a kind of processing technology of whole cut coal tar, comprises the steps:

[0048] 1) Pass the full fraction coal tar into the full fraction coal tar fractionation tower 1, and conduct the first fractionation on the full fraction coal tar at normal pressure and 250°C to obtain light coal tar with a distillation range of 60-180°C , Medium coal tar with a distillation range of 180-230°C and heavy coal tar with a distillation range of 230-800°C;

[0049] 2) Pass the heavy coal tar into the suspension bed hydrogenation reactor 2, and react at a reaction pressure of 18Mpa, a reaction temperature of 450°C, and 0.1h -1 Under the space velocity of 1500:1 and the hydrogen-oil volume ratio, carry out first hydrogenation to described heavy coal tar successively, hydrogenation catalyst is powdery magnetic iron oxide, and addition amount is 2wt%; And after hydrogenation The product is passed into the product separation device 3 for separation, and ...

Embodiment 3

[0055] The present embodiment provides a kind of processing technology of whole cut coal tar, comprises the steps:

[0056] 1) Pass the full fraction coal tar into the full fraction coal tar fractionation tower 1, and conduct the first fractionation on the full fraction coal tar at normal pressure and 280°C to obtain light coal tar with a distillation range of 60-180°C , Medium coal tar with a distillation range of 180-230°C and heavy coal tar with a distillation range of 230-800°C;

[0057] 2) Pass the heavy coal tar into the suspension bed hydrogenation reactor 2, and react at a reaction pressure of 22Mpa, a reaction temperature of 380°C, and 0.5h -1 Under the space velocity of 1000:1 hydrogen-oil volume ratio, carry out first hydrogenation to described heavy coal tar sequentially, hydrogenation catalyst is powdery α-iron oxyhydroxide, and addition is 0.5wt%; And The hydrogenated product is passed into the product separation device 3 for separation, and the separation param...

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Abstract

A full-range coal tar processing process is disclosed. The process includes firstly subjecting full-range coal tar to fractionation to obtain coal tar of different grades; then subjecting heavy coal tar to hydrogenation and separation to obtain a light product and a heavy product; separating the light product again and collecting gas and liquid; subjecting light coal tar and the gas to hydrogenation and collecting a hydrogenation product; subjecting the heavy product to fractionation and collecting wax oil; subjecting medium coal tar, the liquid, the hydrogenation product and the wax oil to hydrogenation and collecting a hydrogenation product; finally fractionating the hydrogenation product. It is found for the first time that the process can effectively avoid overcracking of the light coal tar and the light product, allows the light coal tar and the light product to be sufficiently converted into light oil products through hydrogenation, and deepens the degree of cracking of the heavycoal tar to convert the heavy coal tar into light oil products furthest, and finally, the hydrogenation product is fractionated to obtain naphtha and diesel oil with high yields. Through tests, the total yield of the naphtha and diesel oil is higher than 90%.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a process for processing full fraction coal tar. Background technique [0002] Coal tar is a by-product of coke oven, which is a complex mixture of hydrocarbons, which contains many rare species with recovery value, and is a precious resource that is difficult to obtain in petrochemical industry. But at the same time, it also contains a large amount of oxygen-containing compounds, impurities such as sulfur, nitrogen and metals, and organic impurities, such as iron filings and oxide powders with a size of 10 μm, and high-temperature thermal polymers with a particle size of 0.5 μm. These impurities undoubtedly increase the difficulty of coal tar processing and utilization. [0003] For this reason, the utilization process of coal tar has been extensively studied by researchers in order to achieve the purpose of fully utilizing coal tar. Among many coal ...

Claims

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Application Information

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IPC IPC(8): C10G67/00
CPCC10G67/00C10G2300/70C10G2400/04
Inventor 李林成慧禹
Owner BEIJING HUASHI UNITED ENERGY TECH & DEV
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