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A kind of method of coal tar raw material hydrogenation pretreatment

A technology for hydrotreating pretreatment and coal tar, applied in hydrotreating process, treating hydrocarbon oil, petroleum industry, etc., can solve the problems of affecting the operation cycle of the device, not considering metal removal, and increasing bed pressure, etc. The effect of long operation cycle, extended operation cycle and excellent quality of the device

Active Publication Date: 2018-06-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, coal tar raw material is introduced into the raw material of this method, and the inventor only considered how to solve the coking problem of coal tar and coking distillate oil, and did not consider the removal of metals, etc., resulting in the deposition of metals in the feedstock on the catalyst bed , so that the pressure drop of the bed layer rises too fast, which affects the extension of the operating cycle of the device
[0006] Therefore, how to overcome the defect of using the above-mentioned prior art to process coal tar raw materials, and provide a method for processing coal tar with a simple process and a long device operation period on the basis of low energy consumption to provide a clean fuel with high yield and excellent properties is Key research objectives of researchers in this field

Method used

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  • A kind of method of coal tar raw material hydrogenation pretreatment

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Effect test

Embodiment 1

[0091] With the coal tar raw material to be pretreated in Table 1 as the raw material, it enters the degassing tower and the dehydration tower successively after being filtered by a primary filter, and obtains the coal tar raw material after dehydration, wherein, in the coal tar raw material after the dehydration The dissolved oxygen content is 0.45 μL / L, and the water content is 260 μg / g; then it is sequentially combined with the hydrogenation protection catalyst in the first prehydrogenation reactor and the hydrogenation protection catalyst in the second prehydrogenation reactor and deasphaltene Catalyst contact reaction, the reaction effluent is separated by the post-separation system to separate the water generated by the reaction, the hydrogen-rich cycle gas, and the liquid-phase hydrocarbon effluent, and the liquid-phase hydrocarbon stream enters the stripping tower to remove hydrogen sulfide and ammonia, etc. , the stripper bottom effluent is the pretreated coal tar acco...

Embodiment 2

[0100] With the coal tar raw material to be pretreated in Table 1 as the raw material, it enters the degassing tower and the dehydration tower successively after being filtered by a primary filter, and obtains the coal tar raw material after dehydration, wherein, in the coal tar raw material after the dehydration The dissolved oxygen content is 0.4 μL / L, and the water content is 240 μg / g; then it is sequentially combined with the hydrogenation protection catalyst in the first prehydrogenation reactor and the hydrogenation protection catalyst in the second prehydrogenation reactor and deasphaltene Catalyst contact reaction, the reaction effluent is separated by the post-separation system to separate the water generated by the reaction, the hydrogen-rich cycle gas, and the liquid-phase hydrocarbon effluent, and the liquid-phase hydrocarbon stream enters the stripping tower to remove hydrogen sulfide and ammonia, etc. , the stripper bottom effluent is the pretreated coal tar accor...

Embodiment 3

[0109] With the coal tar raw material to be pretreated in Table 1 as the raw material, it enters the degassing tower and the dehydration tower successively after being filtered by a primary filter, and obtains the coal tar raw material after dehydration, wherein, in the coal tar raw material after the dehydration The dissolved oxygen content is 0.48 μL / L, and the water content is 270 μg / g; then it is sequentially combined with the hydrogenation protection catalyst in the first prehydrogenation reactor and the hydrogenation protection catalyst in the second prehydrogenation reactor and deasphaltene Catalyst contact reaction, the reaction effluent is separated by the post-separation system to separate the water generated by the reaction, the hydrogen-rich cycle gas, and the liquid-phase hydrocarbon effluent, and the liquid-phase hydrocarbon stream enters the stripping tower to remove hydrogen sulfide and ammonia, etc. , the stripper bottom effluent is the pretreated coal tar acco...

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Abstract

The invention relates to the field of coal tar processing, and discloses a method for hydrogenation pretreatment of coal tar raw materials. The method is implemented in a reaction system including a first prehydrogenation reaction zone and a second prehydrogenation reaction zone. The method includes : (1) the coal tar raw material to be pretreated is degassed and dehydrated successively to obtain the dehydrated coal tar raw material, wherein the dissolved oxygen content in the dehydrated coal tar raw material is lower than 1 μL / L, and the water content less than 500 μg / g; (2) In the presence of hydrogen, the dehydrated coal tar raw material is sequentially entered into the first pre-hydrogenation reaction zone and the second pre-hydrogenation reaction zone. When the method of the present invention is used to treat coal tar, the utilization rate of the hydrogenation protection catalyst in the coal tar treatment process can be significantly improved, and the above method of the present invention has low energy consumption, simple process, long device operation period and high product yield Advantages of excellent properties.

Description

technical field [0001] The invention relates to the field of coal tar processing, in particular to a method for hydrogenation pretreatment of coal tar raw materials. Background technique [0002] With the sustained and rapid development of social economy, my country's demand for petroleum products is also increasing. However, petroleum is a non-renewable energy source and is facing a crisis of depletion. In contrast, China has relatively abundant coal reserves, so producing liquid fuel from coal has become a basic direction of coal processing and utilization. [0003] With the rapid growth of the international and domestic steel industry, the coking industry presents a high growth trend, the output of coal tar is increasing, and the clean processing and effective utilization of coal tar are becoming more and more important. At present, the conventional processing method is to cut various fractions with concentrated components through pretreatment distillation, and then use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 李猛吴昊高晓冬胡大为孙淑玲何跃
Owner CHINA PETROLEUM & CHEM CORP
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