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A kind of method for producing white oil by hydrogenation of coal tar

A technology of coal tar and hydrogenation tail oil, which is applied in the fields of tar processing, tar processing by distillation, tar extraction by chemical method, etc. It can solve the problems affecting the operation cycle of hydrogenation unit, high content of metal and mechanical impurities, etc. Achieve the effects of reducing nitrogen content, increasing saturation conversion rate, and reducing deactivation rate

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • A kind of method for producing white oil by hydrogenation of coal tar
  • A kind of method for producing white oil by hydrogenation of coal tar
  • A kind of method for producing white oil by hydrogenation of coal tar

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Effect test

Embodiment 1

[0034] The coal tar raw material is mixed with hydrocracking and hydrocracking, and the proportion of mixed stream is obtained from a mixed stream, and then a sulfuric acid solution having a concentration of 6% is mixed in the acid washing cyclone mixed-separator, and the pickling treatment, At the same time, the oil is separated, resulting in an aqueous solution and the oil phase. The oil phase and distilled water enter the water washing and mixed-separator at a ratio of 1: 5, while water washing, the oil is separated, resulting in aqueous phase and hydrotreating reactor feed. Hydrogenation reactor feed is mixed into hydrotreating reactor to contact hydrogen gas, contacting hydrothermal catalyst, hydrocarnsulfurization, hydrotrification, aromatic hydrocarbon saturation, etc., resulting, produced oil into high pressure separators, separation After the hydrogen purification, the circulating hydrogen compressor is recycled after the circulating hydrogen compressor, and the obtained ...

Embodiment 2

[0036] The coal tar raw material is mixed with hydrocracking production oil in a proportion of 4: 3, and the proportion of a mixed stream is obtained from a concentration of 6% in a ratio of 1: 5 in a hydraulically mixed-separator. Wash treatment, while the oil is separated, the aqueous solution phase and the oil phase are obtained. The oil phase and water enters the water washing in the proportion of 1: 5 into the water washing, while the water washing, the oil is separated, and the water phase and hydrotreating reactor feed are obtained. Hydrogenation reactor feed is mixed into hydrotreating reactor to contact hydrogen gas, contacting hydrothermal catalyst, hydrocarnsulfurization, hydrotrification, aromatic hydrocarbon saturation, etc., resulting, produced oil into high pressure separators, separation After the hydrogen purification, the circulating hydrogen compressor is recycled after the circulating hydrogen compressor, and the obtained oil enters the low pressure separator, ...

Embodiment 3

[0038] The coal tar raw material is mixed with hydrocracking production oil according to 5: 4, resulting in a mixed stream, a ratio of a sulfuric acid solution having a concentration of 8% in a mixture of 1: 4 in the acid wash flow mixing-separator, acid Wash treatment, while the oil is separated, the aqueous solution phase and the oil phase are obtained. The oil phase and water enters the water washing in the proportion of 1: 5 into the water washing, while the water washing, the oil is separated, and the water phase and hydrotreating reactor feed are obtained. Hydrogenation reactor feed is mixed into hydrotreating reactor to contact hydrogen gas, contacting hydrothermal catalyst, hydrocarnsulfurization, hydrotrification, aromatic hydrocarbon saturation, etc., resulting, produced oil into high pressure separators, separation After the hydrogen purification, the circulating hydrogen compressor is recycled after the circulating hydrogen compressor, and the obtained oil enters the l...

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Abstract

The invention discloses a method for producing white oil from coal tar. Feed to the hydrofinishing unit; (2) The feed to the hydrofinishing unit and hydrogen enter the hydrofinishing unit, contact with the hydrofinishing catalyst, and carry out hydrogenation reaction, and the hydrogenation reaction product is fractionated to obtain naphtha and No. 3 crude white oil, No. 5 crude white oil, and hydrogenated tail oil; (3) The hydrogenated tail oil obtained in step (2) enters the hydrocracking unit and contacts with the hydrocracking catalyst for hydrocracking reaction to obtain the resulting oil. This method can convert low-quality and cheap coal tar fractions into high-value-added crude white oil, which solves the problem that the operation cycle of the hydrogenation unit is affected by the high content of metals and mechanical impurities in the raw material of coal tar, and reduces the cost of the hydrogenation process. The reaction temperature reduces energy consumption and improves safety.

Description

Technical field [0001] The present invention relates to the use of coal tar processing industry, in particular, it relates to a method of hydrogenation of coal tar white oil. Background technique [0002] With the rapid development of modern chemical coal (coal gasification-Tau), such as coal gas, methanol and coal, coal-olefins, ethylene glycol coal, coal oil, aromatic hydrocarbons and coal, particularly low-temperature coal tar Coal tar yield trend of rapid growth. [0003] At present, foreign Utilization of coal tar processing is divided into the following aspects: First, to extract monomer products, such as Germany Lvge Te company can be isolated 400 products from coal tar, which has more than 200 kinds industrialization, mainly the production of phenol, refined naphthalene, anthraquinone and other chemical products; Second, deep processing of bitumen to Japan's Mitsubishi Corporation, the US company and Koppars Rilly company on behalf of Australia, the main purpose is the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/20C10C1/14
CPCC10C1/14C10C1/20C10C1/205
Inventor 彭冲杜艳泽白振民孙士可隋宝宽
Owner CHINA PETROLEUM & CHEM CORP
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