Hydrogenation method for medium and low temperature coal tar

A low-temperature coal tar and hydrocracking technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, can solve problems such as poor product quality, achieve light weight, optimize raw materials, and prolong the operation cycle.

Inactive Publication Date: 2013-01-30
王小英
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  • Abstract
  • Description
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Problems solved by technology

This method only treats medium and low temperature coal tar through physical methods, and the product quality is poor, and it does not produce aromatic products

Method used

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  • Hydrogenation method for medium and low temperature coal tar
  • Hydrogenation method for medium and low temperature coal tar

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Embodiment Construction

[0028] The specific method of the present invention is as follows: after the pretreatment of the medium and low temperature coal char raw materials, carry out fractionation in a fractionation tower to obtain phenol oil, light distillate oil and asphalt, wherein the phenol oil is subjected to dephenol treatment to obtain phenol products and dephenol oil , the light distillate oil obtained by fractionation, dephenolized oil and hydrogen are mixed into the hydrotreating reaction zone, the liquid produced by hydrotreating enters the hydrocracking reaction zone, the liquid produced by hydrocracking enters the product fractionation tower, and the middle distillate obtained by fractionation is used as For clean diesel products, the tail oil obtained by fractionation is recycled back to the hydrocracking reaction zone or hydrotreating reaction zone, the naphtha obtained by fractionation enters the catalytic reforming reaction zone, and the hydrogen obtained by catalytic reforming is use...

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Abstract

The invention discloses a hydrogenation method for medium and low temperature coal tar. The medium and low temperature coal tar is pretreated and fractionated to obtain carbolic oil, light distillates and asphalt; the carbolic is subjected to dephenolization to obtain phenol products and dephenolized oil; the light distillates and the dephenolized oil are mixed and sent into a hydrotreating reaction zone; liquid generated from hydrotreatment is sent into a hydrocracking reaction zone; the liquid generated from hydrotreatment is fractionated to obtain intermediate distillate oil used as diesel; the tail oil obtained from fractionation is recycled to the hydrocracking reaction zone or the hydrotreating reaction zone; naphtha obtained from fractionation is sent into a catalytic reforming reaction zone; hydrogen obtained from catalytic reforming is used in a hydrogen system; and the obtained liquid is extracted and fractionated to obtain premium gasoline or light aromatic products. Compared with the prior art, the method provided by the invention employs a combined process comprising fractionation, dephenolization, hydrotreating, hydrocracking and catalytic reforming to obtain phenol products, light aromatic products and high-quality motor fuel, and greatly prolongs operation cycle of the device.

Description

technical field [0001] The invention relates to a coal chemical processing technology, in particular to a hydrogenation method for producing light aromatic hydrocarbons and motor fuels from medium and low temperature coal tar. Background technique [0002] Petroleum is one of the important sources of motor fuel and chemical raw materials. At present, the world's oil consumption continues to grow, but the growth rate of recoverable reserves is obviously slower than the consumption rate. In addition, processing super-heavy oil and oil sand bitumen has become a development trend, so looking for other alternative energy sources has become a development direction . Coal and petroleum are both fossil energy, the main components are carbon and hydrogen, and coal resources are relatively rich, accounting for two-thirds of the world's remaining recoverable reserves of fossil energy, so the production of motor fuel or chemical raw materials from coal has a relatively large developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/10
Inventor 王小英
Owner 王小英
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