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High-temperature coal tar washing oil fraction combination processing method

A high-temperature coal tar and combined processing technology, which is applied in the chemical and petroleum fields, can solve problems affecting conversion rate and yield, and achieve the effect of reducing fractionation temperature and lowering the possibility of coke formation

Active Publication Date: 2015-11-04
程志宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a single mixed system is used for hydrogenation, the process of hydrogenation and saturation of naphthalene to produce decahydronaphthalene will be inhibited by other tricyclic substances, which will affect its conversion rate and yield

Method used

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  • High-temperature coal tar washing oil fraction combination processing method
  • High-temperature coal tar washing oil fraction combination processing method
  • High-temperature coal tar washing oil fraction combination processing method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for combined processing of high-temperature coal tar washing oil fractions, the processing steps are as follows:

[0037] (a) High-temperature coal tar wash oil fraction (property is example with the content of Table 1) first enters vacuum distillation tower and carries out fractionation, obtains light distillate oil, middle distillate oil and heavy distillate oil; The final boiling point of described light distillate oil is 230 °C, the final boiling point of middle distillate oil is 250-270 °C, and the final boiling point of heavy distillate oil is 300-315 °C;

[0038] (b) The light distillate oil obtained in step (a) is used as a product, which can be processed to obtain phenolic substances through phenol extraction;

[0039] (c) The middle distillate oil obtained in step (a) is mixed with excess hydrogen and then enters a middle distillate oil hydrogenation unit, and is contacted with a hydrogenation catalyst in the presence of hydrogen to carry out a hydrog...

Embodiment 2

[0048] A method for combined processing of high-temperature coal tar washing oil fractions, the processing steps are as follows:

[0049] (a) High-temperature coal tar wash oil fraction (property is example with the content of Table 1) first enters vacuum distillation tower and carries out fractionation, obtains light distillate oil, middle distillate oil and heavy distillate oil; The final boiling point of described light distillate oil is 230 °C, the final boiling point of middle distillate oil is 250-270 °C, and the final boiling point of heavy distillate oil is 300-315 °C;

[0050] (b) The light distillate oil obtained in step (a) is used as a product, which can be processed to obtain phenolic substances through phenol extraction;

[0051] (c) The middle distillate oil obtained in step (a) is mixed with excess hydrogen and then enters a middle distillate oil hydrogenation unit, and is contacted with a hydrogenation catalyst in the presence of hydrogen to carry out a hydrog...

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Abstract

The invention relates to the field of petroleum and chemical industry, especially to a high-temperature coal tar washing oil fraction combination processing method. A high-temperature coal tar washing oil fraction undergoes pre-fractionation to obtain a light distillate, an intermediate distillate and a heavy distillate. The light distillate can undergo dephenolization treatment so as to obtain a phenolic substance. The intermediate distillate and the heavy distillate respectively undergo hydrotreatment, and hydrogenation products can undergo fractionation to obtain decahydronaphthalene, refined acenaphthene, refined fluorene, refined phenanthrene and refined anthracene or perhydroacenaphthene, perhydrofluorene, perhydrophenanthrene and perhydroan thracene. The invention provides a new clean and efficient processing method of a high-temperature coal tar washing oil fraction to increase new products with high added value.

Description

technical field [0001] The invention relates to the fields of petroleum and chemical industry, in particular to a combined processing method for washing oil fractions of high-temperature coal tar. Background technique [0002] High-temperature coal tar wash oil fraction is the fraction cut from high-temperature coal tar distillation with a distillation range of 230°C-300°C, and the yield is generally 4.5%-6.5% of anhydrous high-temperature coal tar. The wash oil fraction is rich in naphthalene, biphenyl, Aromatic components such as acenaphthene, fluorene, phenanthrene, and anthracene may exist in the form of derivatives with alkyl groups, metal ions, and heteroatoms such as S, N, and O in addition to polycyclic hydrocarbons. At the same time, there are organic sulfur impurities such as thiophene and carbon disulfide. Among them, naphthalene and its derivatives mainly exist in the medium oil fraction at 230-270°C, and aromatic components such as acenaphthene, fluorene, phena...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 程志宇宋建菊
Owner 程志宇
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