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 effectively utilized. Organically combined to provide a coal tar hydrogenation process that can maximize the utilization of solid residual oil and co-produce gasoline, diesel, and needle coke products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The coal tar hydrogenation process described in the present embodiment comprises the following steps:

[0035] (1) Send the coal tar raw material into the distillation tower, carry out distillation treatment under normal pressure, and divide it into light distillate oil of ≤350°C and heavy distillate oil of >350°C;

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

[0037] (3) Using a high-temperature separator to separate gas-liquid from the outlet material of the hydrogenation reactor, the temperature of the high-temperature separator is 300°C;

[00...

Embodiment 2

[0043] The coal tar hydrogenation process described in the present embodiment comprises the following steps:

[0044] (1) Send the coal tar raw material into the distillation tower for distillation treatment, and divide it into light distillate oil ≤ 320 °C and heavy distillate oil > 320 °C;

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

[0046] (3) Using a high-temperature separator to separate the gas-liquid from the outlet material of the hydrogenation reactor, the temperature of the high-temperature separator is 400°C;

[0047] (4) The liquid phase m...

experiment 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 the above-mentioned embodiment 1 and embodiment 2. in:

[0054] Yield of light distillate oil %= Light distillate oil / coal tar raw material of ≤350°C or ≤320°C obtained in step (1) distillation tower×100%;

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

[0056] Water yield % = water generated in the whole hydrogenation process / coal tar raw material × 100%;

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

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

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

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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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