Coal tar hydrogenation process for maximizing utilization of coal tar residues

A technology of coal tar and process, applied in the field of new hydrogenation process, can solve the problem that solid residual oil has not been effectively utilized, and achieve the effects of saving heating equipment, expanding production scale, and being easy to dissolve and extract

Active Publication Date: 2014-06-25
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] What the present invention aims to solve is the problem in the prior art that the solid residual oil produced after the hydrogenation of coal tar fractions >350°C has not been effective

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] The coal tar hydrogenation process described in this embodiment includes the following steps:

[0035] (1) The coal tar raw material is sent to the distillation tower, and it is distilled under normal pressure, and it is divided into light distillate oil of ≤350℃ and heavy distillate oil of >350℃;

[0036] (2) Mixing the heavy distillate oil obtained by the distillation treatment in step (1) with γ-FeOOH and sulfur catalyst to form an oil slurry, wherein the addition amount of the γ-FeOOH is calculated as Fe as the heavy distillate oil The molar ratio of S in the sulfur to Fe in the γ-FeOOH is 1:3; the slurry is mixed with hydrogen and sent to the slurry-bed hydrogenation reactor at 420°C, 15MPa, Hydrogenation reaction under the condition of gas-liquid ratio of 500NL / kg;

[0037] (3) Using a high-temperature separator to separate the material at the outlet of the hydrogenation reactor for gas-liquid separation, and the temperature of the high-temperature sep...

Example Embodiment

[0042] Example 2

[0043] The coal tar hydrogenation process described in this embodiment includes the following steps:

[0044] (1) The coal tar raw material is sent to the distillation tower for distillation treatment, which is divided into light distillate oil ≤320℃ and heavy distillate oil >320℃;

[0045] (2) Mixing the heavy distillate oil obtained by the distillation treatment in step (1) with γ-FeOOH and sulfur catalyst to form an oil slurry, wherein the addition amount of the γ-FeOOH is calculated as Fe as the heavy distillate oil The molar ratio of S in the sulfur to Fe in the γ-FeOOH is 1:3; the slurry is mixed with hydrogen and sent to the slurry-bed hydrogenation reactor at 460°C, 19MPa, Hydrogenation reaction under the condition of gas-liquid ratio of 1500NL / kg;

[0046] (3) Using a high-temperature separator to separate the materials at the outlet of the hydrogenation reactor for gas-liquid separation, and the temperature of the high-temperature separator is 400°C;

[0...

Example Embodiment

[0052] Experimental example

[0053] In order to prove the technical effect of the coal tar hydrogenation process described in the present invention, this experimental example measured the yield in the hydrogenation process described in Example 1 and Example 2. among them:

[0054] Light distillate oil yield% = step (1) the light distillate oil ≤350℃ or ≤320℃ obtained from the distillation tower / coal tar raw material×100%;

[0055] Gas yield% = gas fraction generated during the entire hydrogenation process / coal tar raw material × 100%;

[0056] Water yield% = moisture generated during the entire hydrogenation process / coal tar raw material×100%;

[0057] Hydrogen consumption% = hydrogen consumed in the entire hydrogenation process / coal tar raw material×100%;

[0058] Needle coke yield% = needle coke / coal tar raw material produced by delayed coking system×100%;

[0059] The above-mentioned yields are all percentages by mass, and the coal tar raw material is based on an anhydrous and ash-f...

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PUM

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Abstract

The invention discloses a coal tar hydrogenation process which comprises the following steps: (1), carrying out distillation onto the coal tar; (2), carrying out hydrogenation treatment onto distilled heavy distillate oil; (3), carrying out gas-liquid separation onto the hydrogenated product; (4), feeding a liquid-phase material obtained by gas-liquid separation into a first separator, and feeding a vapor-phase material into a low-temperature separator; (5), mixing heavy residual oil obtained through separation of the first separator, a liquid-phase separated out by a low-temperature separator and light distillate oil, and then feeding into a second separator; (6), mixing light oil obtained by the first separator and the second separator and then filtering, and distilling the filtrate to obtain light oil, medium-weight oil and heavy oil; and (7), feeding the heavy oil into a delayed coking system to produce needle cokes and circulation oil, feeding the circulation oil into a slurry-bed reactor, and carrying out hydrorefining onto the light oil and the medium-weight oil to obtain petroleum and aviation kerosene. According to the coal tar hydrogenation process disclosed by the invention, the coal tar hydrogenation and residual oil extraction are combined together, so that utilization rate of active ingredients in the heavy residues and gas-oil recovery rate of the coal tar are increased.

Description

technical field [0001] The invention belongs to the fields of coal tar hydrogenation and needle coke processing, and in particular relates to a novel hydrogenation process capable of realizing the maximum utilization of coal tar residues and increasing the value of coal tar. Background technique [0002] After decades of development, my country's coal chemical industry occupies a very important position in the chemical industry. In recent years, due to rising international oil prices and the utilization of clean energy, coal chemical industry has increasingly shown its advantages. From the traditional process of coal coking, coal gasification-synthetic ammonia-chemical fertilizer to coal gasification, coal-to-natural gas, coal-to-methanol, coal-to-olefin, coal-to-oil, sustained and rapid development has been achieved in recent years. Processes such as coal coking, coal-to-gas, and coal-to-semi-coke all produce a large number of by-products, namely high-temperature coal tar ...

Claims

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Application Information

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IPC IPC(8): C10G69/00
Inventor 任相坤井口宪二刘欢崔永君丁同利高忠超
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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