Combined hydrogenation process method for treating coal tar and residual oil

A technology of coal tar and residual oil, applied in the field of combined technology

Inactive Publication Date: 2014-01-29
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method also does not fully utilize the coal tar

Method used

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  • Combined hydrogenation process method for treating coal tar and residual oil
  • Combined hydrogenation process method for treating coal tar and residual oil
  • Combined hydrogenation process method for treating coal tar and residual oil

Examples

Experimental program
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Embodiment 1

[0025] In this embodiment, the combined hydrogenation process of the present invention is adopted, and the properties of coal tar, light and heavy fractions of coal tar and residual oil are shown in Table 1.

[0026] Table 1 Raw material properties

[0027]

[0028]

[0029]Coal tar distillation is divided into light coal tar fraction less than or equal to 350°C and heavy coal tar fraction greater than 350°C; the mass ratio of coal tar heavy fraction (greater than 350°C) to residual oil is 1:1, catalyst and vulcanizing agent Mix evenly, and sulfide the catalyst under the action of hydrogen. The sulfided mixed material is preheated, and then enters the slurry bed reactor for hydrocracking reaction; the product from the slurry bed reactor is subjected to fractional distillation to obtain gas, hydrogenation Naphtha, Hydrogenated Diesel and Hydrogenated Tails. The light fraction of coal tar (less than or equal to 350°C) and the residual oil with a mass ratio of 1:4 enter th...

Embodiment 2

[0031] Coal tar distillation is divided into light coal tar fraction less than or equal to 350°C and heavy coal tar fraction greater than 350°C; the mass ratio of coal tar heavy fraction (greater than 350°C) to residual oil is 1:1, catalyst and vulcanizing agent Mix evenly, and sulfide the catalyst under the action of hydrogen. The sulfided mixed material is preheated, and then enters the slurry bed reactor for hydrocracking reaction; the product from the slurry bed reactor is subjected to fractional distillation to obtain gas, hydrogenation Naphtha, hydrogenated diesel oil and hydrogenated tail oil; part of the hydrogenated tail oil is returned to the preheating equipment as circulating tail oil for recycling, and the other part is sent to the fixed bed residue hydrogenation unit. Hydrogenated tail oil, light fraction of coal tar (less than or equal to 350°C) and residual oil at a mass ratio of 1:2:4 enter the fixed-bed residual oil hydrogenation unit in the presence of hydrog...

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Abstract

The invention relates to a combined hydrogenation process method for treating coal tar and residual oil. The method comprises the following steps: distilling coal tar with water and solid particles removed to obtain light coal tar fraction not larger than 350 DEG C and heavy coal tar fraction larger than 350 DEG C; mixing the heavy coal tar fraction larger than 350 DEG C with residual oil, hydrogen and a catalyst, reacting the mixture in a slurry bed hydrogenation reactor, and conveying hydrogenation tail oil of 350-470 DEG C to a fixed bed residual oil hydrogenation unit; reacting the light coal tar fraction not larger than 350 DEG C with the residual oil and the hydrogen or the hydrogenation tail oil in the fixed bed residual oil hydrogenation unit, and separating the reaction products to obtain a dry gas, hydrogenated naphtha, hydrogenated diesel oil and hydrogenated residual oil. According to the method, slurry bed hydrogenation treatment is organically combined with the fixed bed residual oil hydrogenation process to process all coal tar fractions so as to improve the utilization rate of the coal tar, expand the source of residual oil hydrogenation raw materials, prolong the operation period of the fixed bed residual oil hydrogenation unit and improve the impurity removal rate of the residual oil hydrogenation product.

Description

technical field [0001] The invention relates to a method for treating coal tar and residual oil with a hydrogenation treatment process, more specifically a combined process for treating coal tar and residual oil by organically combining a fixed-bed hydrogenation process and a slurry-state hydrogenation process. Background technique [0002] The characteristics of the petroleum industry in the 21st century are: high oil prices, crude oil keeps getting heavier and worse, and the proportion of unconventional crude oil (such as heavy oil, super heavy oil and oil sand bitumen, etc.) is getting higher and higher. Therefore, the deep processing of residual oil is getting more and more attention. Due to the increasing market demand for middle distillates and increasingly stringent environmental regulations, residue hydrogenation technology has developed rapidly. [0003] In the lightening method of residual oil, the combined process of residual oil hydrogenation-catalytic cracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 于双林赵愉生崔瑞利谭青峰程涛张春光刘元东赵元生范建光那美琦张志国周志远
Owner PETROCHINA CO LTD
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