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Stable hydrogenation process for liquefied coal coil

A coal liquefied oil, stable technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of low space velocity, poor technical economy, etc., to improve stability, reduce olefin and aromatic content, reduce equipment investment and operating costs Effect

Inactive Publication Date: 2004-03-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the space velocity of the above two processes is low, and the technical economy is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The test raw material is coal liquefied oil A, and the properties of raw oil, process conditions and product properties are listed in Table 1, Table 2 and Table 3, respectively. It can be seen from the table that the distillation range of the raw material is relatively light, and the dry point of the Engler's distillation range is 393°C. Under mild operating conditions, the bromine value of the stable hydrogenation product is very low, indicating that most of the olefins in the coal liquefied oil are saturated; the product The content of nitrogen, sulfur and oxygen is very low, the nitrogen content is only 87ppm, the distillation range becomes lighter, and the purpose of stable hydrogenation is achieved.

Embodiment 2

[0026]The test raw material is coal liquefied oil B, and the properties of raw oil, process conditions and product properties are listed in Table 1, Table 2 and Table 3, respectively. It can be seen from the table that the nitrogen content of the raw material is high, and under severe operating conditions, the bromine value of the stable hydrogenation product is very low, indicating that most of the olefins in the coal liquefied oil are saturated; the content of nitrogen, sulfur and oxygen in the product is very low, and the nitrogen content Only 68ppm, the distillation range becomes lighter, and the purpose of stable hydrogenation is achieved.

Embodiment 3

[0028] The test raw material is coal liquefied oil C, and the properties of the raw oil, process conditions and product properties are listed in Table 1, Table 2 and Table 3, respectively. It can be seen from the table that the distillation range of the raw material is relatively heavy, and the dry point of the Engler's distillation range is 450°C. Under relatively harsh operating conditions, the bromine price of the stable hydrogenation product is very low, indicating that most of the olefins in the coal liquefied oil are saturated; the product The content of nitrogen, sulfur and oxygen is very low, the nitrogen content is only 26ppm, the distillation range becomes lighter, and the purpose of stable hydrogenation is achieved.

[0029] Example 1

[0030] Process conditions

[0031] Product properties

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Abstract

A stable hydrogenation process of liquefied coal oil includes filtering the liquefied coal oil, adding it along with hydrogen gas to stable hydrogenation reactor, contacting with hydroprotector and hydrorefining catalyst, flowing in its product through high-pressure separator, low-pressure separator and fractional tower to respectively obtain hydrogen-enriched airflow, light fraction and tail oil fraction, mixing said hydrogen-enriched airflow with fresh hydrogen, and returning the mixture back to said stable hydrogenation reactor. It has high effect on removing impurities from liquefied oil to maximum.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of liquid hydrocarbons obtained by destructive hydrogenation of coal. More specifically, it is a hydrofinishing method for coal liquefied oil. technical background [0002] As early as 1913, Germany had started research on the technology of direct coal liquefaction to produce liquid hydrocarbon products, and industrialized the technology of producing gasoline by direct liquefaction of lignite in 1927. Since the first world oil crisis occurred in 1973, the direct coal liquefaction technology has attracted the attention of developed countries, and many direct coal liquefaction processes have been developed successively. [0003] Because coal liquefied oil contains a large amount of olefins, the nitrogen content is generally above 0.5%, and it also contains a certain amount of oxygen. If it is not pretreated in time, it is very easy to generate substances that are not c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/00
Inventor 李大东胡志海门卓武石亚华康小洪王锦业
Owner CHINA PETROLEUM & CHEM CORP
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