Method for producing white oil and fuel oil by coal tar hydrogenation

A coal tar and fuel oil technology, which is applied in the field of coal tar hydrogenation to produce white oil and fuel oil, can solve the problems of high content of metal and mechanical impurities, affecting the operation cycle of the hydrogenation unit, etc., so as to reduce the operating severity and reduce the secondary Second cracking conversion reaction, effect of reducing inactivation rate

Active Publication Date: 2020-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies in the prior art, the present invention provides a method for producing white oil and fuel oil from coal tar, which can convert low-quality and cheap coal tar fractions into high value-added crude white oil and fuel oil products, solving the problem of The high content of metals and mechanical impurities in coal tar raw materials affects the operation cycle of the hydrogenation unit, and at the same time reduces the reaction temperature in the hydrofining process, reduces energy consumption, and improves safety

Method used

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  • Method for producing white oil and fuel oil by coal tar hydrogenation
  • Method for producing white oil and fuel oil by coal tar hydrogenation
  • Method for producing white oil and fuel oil by coal tar hydrogenation

Examples

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Embodiment 1

[0038] Coal tar raw material and fuel oil are mixed in a ratio of 6:4 to obtain a mixed flow, and then mixed with a sulfuric acid solution with a concentration of 6% in a ratio of 1:5 in a pickling cyclone mixing separator for pickling treatment, and the process is completed at the same time The oil and water are separated to obtain an aqueous phase and an oil phase. The oil phase and distilled water enter the water-washing cyclone mixer-separator at a ratio of 1:5. While washing with water, the oil-water separation is completed to obtain the water phase and the reaction raw materials with low metal content. The reaction raw materials with low metal content enter the separation tower to obtain light component raw materials and heavy component raw materials. The light component raw material enters the hydrofinishing reactor with new hydrogen and recycled hydrogen, contacts with the hydrofinishing catalyst, and undergoes reactions such as hydrodesulfurization, hydrodenitrogenati...

Embodiment 2

[0040] Coal tar raw material and fuel oil are mixed in a ratio of 4:3 to obtain a mixture flow, and then mixed with a sulfuric acid solution with a concentration of 6% in a ratio of 1:5 in a pickling cyclone mixing-separator for pickling treatment. At the same time, oil-water separation is completed to obtain an aqueous phase and an oil phase. The oil phase and water enter the water-washing cyclone mixer-separator at a ratio of 1:5. While washing with water, the oil-water separation is completed to obtain the water phase and the reaction raw materials with low metal content. The reaction raw materials with low metal content enter the separation tower to obtain light component raw materials and heavy component raw materials. The light component raw material enters the hydrofinishing reactor with new hydrogen and recycled hydrogen, contacts with the hydrofinishing catalyst, and undergoes reactions such as hydrodesulfurization, hydrodenitrogenation, and saturation of aromatic hyd...

Embodiment 3

[0042] Coal tar raw material and fuel oil are mixed in a ratio of 5:4 to obtain a mixture flow, and then mixed with a sulfuric acid solution with a concentration of 8% in a ratio of 1:4 in a pickling cyclone mixing-separator for pickling treatment. At the same time, oil-water separation is completed to obtain an aqueous phase and an oil phase. The oil phase and water enter the water-washing cyclone mixer-separator at a ratio of 1:5. While washing with water, the oil-water separation is completed to obtain the water phase and the reaction raw materials with low metal content. The reaction raw materials with low metal content enter the separation tower to obtain light component raw materials and heavy component raw materials. The light component raw material enters the hydrofinishing reactor with new hydrogen and recycled hydrogen, contacts with the hydrofinishing catalyst, and undergoes reactions such as hydrodesulfurization, hydrodenitrogenation, and saturation of aromatic hyd...

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Abstract

The invention discloses a method for producing white oil and fuel oil from coal tar. The method comprises the following steps: (1) mixing a coal tar raw material with a part of a fuel oil product to obtain a mixture flow A, and sequentially carrying out acid washing treatment and water washing treatment; (2) feeding the raw oil with low metal content, obtained in step (1), into a separation tower,and cutting light and heavy components; (3) enabling the light component and hydrogen to enter a hydrofining unit and contact with a hydrofining catalyst, carrying out a hydrogenation reaction, mixing the obtained hydrofined oil with hydrocracked oil, and carrying out fractionation to obtain naphtha, No.3 crude white oil, fuel oil and hydrogenated tail oil; and (4) feeding heavy components and hydrogenated tail oil into a hydrocracking unit. The coal tar fraction can be converted into high-added-value crude white oil and fuel oil, the problem that the operation period of a hydrogenation device is affected due to the fact that the content of metal, mechanical impurities and the like in the coal tar raw material is high is solved, the reaction temperature of hydrofining is reduced, energy consumption is reduced, and safety is improved.

Description

technical field [0001] The invention relates to the field of coal tar processing and utilization, in particular to a method for hydrogenating coal tar to produce white oil and fuel oil. Background technique [0002] With the rapid development of modern coal chemical industry (leading by coal gasification), such as coal-to-natural gas, coal-to-methanol, coal-to-olefins, coal-to-ethylene glycol, coal-to-aromatics and coal-to-oil, etc., coal tar is especially Coal tar production presents a rapid growth trend. [0003] At present, the ways of processing and utilizing coal tar in foreign countries are mainly divided into the following aspects: First, the extraction of monomer products is the main method. Industrialization mainly produces chemical products such as phenol, refined naphthalene, and anthraquinone; the second is mainly the deep processing of asphalt, represented by Mitsubishi Corporation of Japan, Rilly of the United States and Koppars of Australia, the main purpose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/20C10C1/14
CPCC10C1/14C10C1/20C10C1/205
Inventor 彭冲杜艳泽隋宝宽崔哲郭蓉
Owner CHINA PETROLEUM & CHEM CORP
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