Coal tar multistage hydrogenation treatment technique

A technology for coal tar and pre-hydrogenation, which is used in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of furnace tube coking and affecting the operation cycle of the device, etc.

Active Publication Date: 2008-08-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal tar directly entering the high-temperature heating furnace in this process will

Method used

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  • Coal tar multistage hydrogenation treatment technique
  • Coal tar multistage hydrogenation treatment technique
  • Coal tar multistage hydrogenation treatment technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0029] The serial number 1 is the raw material tank, 2 is the pre-hydrogenation reactor, 3 is the separation device, 4 is the hydrodemetallization reactor, 5 is the deep hydrofining reactor, 6 is the separation device, and 7 is the hydrocracking reactor , 8 is a distillation unit, 9 is water, 10 is gasoline, 11 is diesel oil, 12 is hydrocracking tail oil, 13 is hydrogen, and the rest are pipelines.

[0030] Schematic diagram of the principle process for producing light fuel oil by multi-stage hydrotreating of coal tar ( figure 1 ): Firstly, the coal tar raw material in the raw material tank 1 is mixed with hydrogen, and then the mixture is contacted with part of the stream generated from hydrodemetallization, or deep hydrofinishing or hydrocracking reaction in the pre-hydrogenation reactor to carry out Hydrogenation of olefins, descaling and demetallization of raw materials, the reaction conditions are: pressure 1-10Mpa, temperature: 150-280°C, hydrogen-oil volume ratio 500-50...

specific Embodiment approach

[0031] In the present invention, a multi-stage combination process is used to carry out hydrocracking of coal tar raw material to produce light oil products.

[0032] For further illustrating various main points of the present invention, enumerate following embodiment. The percentages are percentages by weight.

[0033] Among them, the fixed bed hydrogenation and prehydrogenation catalyst is FZC-102 catalyst developed and produced by Fushun Petrochemical Research Institute, the hydrodemetallization catalyst is FZC-202 catalyst developed and produced by Fushun Petrochemical Research Institute, and the deep hydrorefining catalyst is Fushun Petroleum. The FF-16 catalyst developed and produced by the Research Institute of Chemical Industry, the hydrocracking catalyst is the FC-28 catalyst developed and produced by Fushun Petrochemical Research Institute, the fluidized bed hydrogenation and pre-hydrogenation catalyst is spherical, the particle diameter is 0.5mm, and the pore volume...

Embodiment 1

[0035] This example is a hydrogenation test of high-temperature coal tar distillates using a multi-stage combined process. Among them, the properties of coal tar raw materials are: Density (20°C): 1.1365g / cm 3 , carbon residue: 3.4%; sulfur: 6000μg / g, nitrogen: 10000μg / g, saturated content: 0%; aromatic component: 69.1%; colloid: 27.9%, asphaltenes: 3%; mechanical impurities 1.8%. First, the coal tar raw material in the raw material tank 1 is mixed with hydrogen, and then the mixture is contacted with the stream generated from the hydrodemetallization reaction in the fixed bed pre-hydrogenation reactor to carry out hydrogenation saturation of olefins and descaling and demetallization of the raw material ; The pre-hydrogenation stream is separated from the fine solid particles suspended in the product stream by a centrifugal separation device, and then enters the hydrodemetallization reactor to remove metal impurities; the stream from the bottom of the hydrodemetallization reac...

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Abstract

The invention discloses a coal-tar oil multistage hydrogenation craft, which belongs to coal chemical industry technology area. The method of the invention is that coal-tar oil fraction oils like impurities, sols, high content, asphaltenes, oxygen element, and so on, with high content or entire fraction are delivered into pre-hydrogenation reaction chamber by pump and are carried on pre-hydrogenation processing, then are successively followed by hydrogenation and demetallization, and depth hydrogenation reaction. After carried on separation of water and lightweight components, the generative fluid enters into a hydrocracking reactor, passes by a distiller to get gasoline fractions, diesel oil and hydrocracking tail oil out. Compared with the prior art, the invention can guarantee the long-period stability operation of the installation.

Description

technical field [0001] The invention relates to a coal tar treatment process, in particular to a process method for producing clean light fuel by using a multi-stage hydrogenation process with coal tar distillate oil or whole distillate as raw material. Background technique [0002] Coal tar is a by-product of coal coking, carbonization and gasification. Coal tar is different from natural petroleum in that it has a complex composition, high content of polycyclic aromatic hydrocarbons, colloids and asphaltenes, and contains a certain amount of unsaturated olefins and impurities such as oxygen, sulfur, nitrogen and metals. According to information, coal tar starts to undergo condensation reaction at a temperature higher than 180°C, and coke will be formed. At the same time, coal tar contains a large number of fine inorganic impurities and organic impurities. The inorganic impurities are mainly iron filings and oxide powder with a particle diameter of about 10 μm, and the orga...

Claims

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Application Information

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IPC IPC(8): C10G65/12
Inventor 贾丽杨涛葛海龙于斌王志勇
Owner CHINA PETROLEUM & CHEM CORP
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