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Coal tar hydrogenation pretreatment method and coal tar hydrogenation treatment method

A technology of hydrotreating pretreatment and hydrotreating, which is applied in hydrotreating process, treating hydrocarbon oil, refining tar by chemical method, etc., can solve the problem of short operation cycle of catalyst bed device, and achieve long continuous operation cycle. , the effect of low density and low sulfur and nitrogen content

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Due to the high content of metals in coal tar raw materials, especially the high content of Fe, Ca, and Na, these metals will be deposited on the surface of the catalyst during the hydrogenation of coal tar, and less will enter the interior of the catalyst particles. Therefore, during the operation of the hydrogenation unit The pressure drop of the middle catalyst bed rises quickly, resulting in a short operation period of the device

Method used

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  • Coal tar hydrogenation pretreatment method and coal tar hydrogenation treatment method
  • Coal tar hydrogenation pretreatment method and coal tar hydrogenation treatment method
  • Coal tar hydrogenation pretreatment method and coal tar hydrogenation treatment method

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Embodiment 1

[0060] This embodiment is carried out in a coal tar hydrotreating device, and the hydrogenation protection system in this embodiment includes 3 hydrogenation protection reactors connected in series in sequence, and RGC-1 is all filled in these 3 hydrogenation protection reactors as Hydrogenation protection catalyst, the loading amount is 20mL; the hydrogenation main reactor is filled with 100mL of the main hydrogenation refining catalyst RTC-2; the temperature of the high-temperature hydrogenation tail oil is 350 ° C, and the low-temperature hydrogenation tail The temperature of the oil was 60°C.

[0061] This embodiment adopts as figure 1 The process method shown is carried out, specifically:

[0062]The circulating hydrogen in the device is mixed with the new hydrogen from pipeline 1, then mixed with the coal tar raw material from pipeline 2 through pipeline 3, and mixed with the high-temperature hydrogenated tail oil from pipeline 28 after heat exchange in heat exchanger 4...

Embodiment 2

[0090] Present embodiment adopts the method similar to embodiment 1 to carry out, and difference is:

[0091] Each hydrogenation protection reactor adopts the following operating conditions when the device is running, specifically:

[0092] The first stage: the temperature of the first hydrogenation protection reactor is 300°C, the temperature of the second hydrogenation protection reactor is 160°C; the temperature of the third hydrogenation protection reactor is 160°C, and the hydrogenation main reaction The temperature of the reactor is 400°C; the pressure in the hydrogenation protection reaction system and the hydrogenation main reactor is 18MPa, and the liquid hourly volume space velocity is 1.2h -1 , the volume ratio of hydrogen to oil is 1200:1; the amount of the high-temperature hydrogenation tail oil introduced from the pipeline before the first hydrogenation protection reactor makes the high-temperature hydrogenation tail oil and the material in the hydrogenation prot...

Embodiment 3

[0101] Present embodiment adopts the method similar to embodiment 1 to carry out, and difference is:

[0102] Each hydrogenation protection reactor adopts the following operating conditions when the device is running, specifically:

[0103] The first stage: the temperature of the first hydrogenation protection reactor is 250°C, the temperature of the second hydrogenation protection reactor is 140°C; the temperature of the third hydrogenation protection reactor is 140°C, the hydrogenation main reaction The temperature of the reactor is 380°C; the pressure in the hydrogenation protection reaction system and the hydrogenation main reactor is 12MPa, and the liquid hourly volume space velocity is 0.9h -1 , the volume ratio of hydrogen to oil is 800:1; the amount of the high-temperature hydrogenation tail oil introduced from the pipeline before the first hydrogenation protection reactor makes the high-temperature hydrogenation tail oil and the material in the hydrogenation protectio...

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Abstract

The invention discloses a coal tar hydrogenation pretreatment method and a method for coal tar hydrogenation treatment by using the coal tar hydrogenation pretreatment method. The coal tar hydrogenation pretreatment method comprises the following steps: introducing materials containing coal tar and hydrogen to a hydrogenation protective reaction system to carry out hydrogenation pretreatment, so as to obtain a hydrogenation protective effluent; the hydrogenation pretreatment is implemented under the conditions of respectively introducing high temperature hydrogenation tail oil and low temperature hydrogenation tail oil to the hydrogenation protective reaction system. The method disclosed by the invention can improve the utilization efficiency of a hydrogenation protective catalyst, and prolong the running cycle of a coal tar hydrogenation device, and further can obtain product oil of which the metal content is remarkably reduced. Furthermore, a diesel product obtained by the hydrogenation treatment method disclosed by the invention has high cetane number, low density and low sulfur and nitrogen content, thereby being a high-quality diesel oil blending component suitable for vehicles.

Description

technical field [0001] The invention relates to a method for hydrogenation pretreatment of coal tar and a method for hydrogenation treatment of coal tar. Background technique [0002] With the rapid development of modern coal chemical industry (leading by coal gasification) coal-to-natural gas, coal-to-methanol, coal-to-olefins, coal-to-ethylene glycol, coal-to-aromatics and coal-to-oil, etc., coal tar, especially medium and low temperature coal tar The output showed a trend of rapid growth. [0003] In recent years, due to factors such as energy conservation, emission reduction and environmental protection requirements, breakthroughs in key technologies for coal tar hydrogenation, and the considerable benefits of coal tar hydrogenation demonstration units, there has been an upsurge of investment in coal tar hydrogenation in China. The latest statistics show that in 2013 my country's coal tar production capacity was about 23.5 million tons; with the release of new productio...

Claims

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Application Information

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IPC IPC(8): C10C1/20C10G67/02
Inventor 吴昊李猛高晓冬胡志海龙湘云黄放
Owner CHINA PETROLEUM & CHEM CORP
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