Processing process for preparing various asphalt and fuel oil with coal tar

A processing technology and fuel oil technology, applied in the direction of tar processing by distillation method, can solve the problems of inability to produce high softening point asphalt and low quinoline insoluble asphalt, etc., to improve the added value and the quality of asphalt, stable quality, simple craftsmanship

Active Publication Date: 2008-12-17
浙江美阳国际工程设计有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of processing technology that prepares various asphalt and fuel oil by coal tar in view of the deficiencies in the prior art, and it solves the problem that high softening point asphalt and low quinoline insolubles cannot be produced in coal tar asphalt processing It is a big problem of asphalt, which greatly improves the added value of coal tar processing, and has the characteristics of less equipment investment, convenient operation, less pollution and good quality of asphalt

Method used

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  • Processing process for preparing various asphalt and fuel oil with coal tar
  • Processing process for preparing various asphalt and fuel oil with coal tar

Examples

Experimental program
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Embodiment 1

[0025] 1. Atmospheric distillation

[0026] Heat 50kg of coal tar to 350°C and enter the atmospheric rectification tower. After a period of total reflux, and when all the parameters of the tower are stable, start to cut off the 230°C mixed distillate at the top of the tower. 45% of the mixed fraction is sold as chemical raw material, and 55% of the soft asphalt fraction is distilled from the bottom of the tower.

[0027] 2. Vacuum distillation

[0028] Add 5kg of solvent oil to the soft asphalt fraction distilled from the bottom of the atmospheric distillation tower. The solvent oil is a mixed solvent based on NMP (pyrrolidone). After being evenly mixed with the soft asphalt, it is heated to 360°C and enters the vacuum distillation tower for rectification. , the 195°C light component cut from the top of the tower is condensed and used as solvent oil for soft asphalt blending, the 200°C light component cut from the side line at the upper part of the tower is condensed and then...

Embodiment 2

[0050] 1. Atmospheric distillation

[0051] Heat 100kg of coal tar to 355°C and enter the atmospheric rectification tower. After a period of total reflux, and when the parameters of the tower are stable, start to cut off the 240°C mixed distillate at the top of the tower, and extract from the side line dianthracene oil section 45% of the mixed fraction is sold as chemical raw material, and 55% of the soft asphalt fraction is distilled from the bottom of the tower.

[0052] 2. Vacuum distillation

[0053]Add 12kg of solvent oil to the soft asphalt fraction distilled from the bottom of the atmospheric distillation tower. The solvent oil is a mixed solvent based on NMP (pyrrolidone). The 200°C light component cut from the top is condensed and used as solvent oil for soft asphalt blending. The 202°C light component cut from the side line at the upper part of the tower is condensed and then goes to the preparation process to produce fuel oil. The distillate at the bottom of the to...

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Abstract

The invention discloses a processing technology for preparing various pitches and fuel oils by coal tar which comprises the steps that: the coal tar is heated to 350 DEG C to 360 DEG C, rectified at ordinary pressure first and then at reduced pressure, primarily ultracentrifugated and secondarily ultracentrifugated to produce purified pitch, impregnating pitch, modified pitch, high softening point pitch and fuel oils. The invention has simple technology and convenient operation, can produce various high quality pitches and fuel oils and is characterized by less investment in devices and stable quality, thus better solving the problems of low general grade of pitches of China at present, unstable fraction of fuel oils and pitches and plenty of impurities and being quite applicable to the processing and producing of the fuel oils.

Description

technical field [0001] The invention relates to the technical field of coal tar processing, in particular to a processing technology for preparing various pitches and fuel oils from coal tar. Background technique [0002] Chinese patent: ZL200410033280.2 "intermittent single-kettle medium-temperature and modified asphalt production process", discloses a production process of medium-temperature and modified asphalt in a single kettle, which solves the problem of long production cycle of medium-temperature asphalt and modified asphalt The current technical situation of multi-pot continuous production is required, and the whole process only takes 28-36 hours. The main process method is: dehydration treatment of coal tar raw material to water content ≤ 5%, heating of coal-fired waste gas, furnace temperature is 800-900 ℃, negative pressure in the kettle, that is, the vacuum degree of distillation tower is 0.04-0.075Pa, heating and distilling After cutting out the three-mixed oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/16C10C1/04
Inventor 杨东平
Owner 浙江美阳国际工程设计有限公司
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