Production method of high-bioctyl-value diesel oil by coal liquification

A technology for producing high cetane and coal direct liquefied oil, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, etc., can solve the problems affecting the start-up period and deactivation of hydrogenation upgrading catalysts, etc., so as to prolong the start-up period and prevent Rapid inactivation and reduced processing difficulty

Active Publication Date: 2008-05-21
CHINA PETROLEUM & CHEM CORP
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Problems solved by technology

Although this method can obtain diesel products with a cetane number of more than 45, due to impurities such as nitrogen contained in direct coal liquefied oil, the hydrogenation upgrading catalyst is rapidly deactivated, which affects the start-up period

Method used

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  • Production method of high-bioctyl-value diesel oil by coal liquification

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Experimental program
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Effect test

Embodiment 1

[0030] The test raw material is diesel fraction A stabilized by direct coal liquefied oil hydrogenation. Hydrogen upgrading catalyst RIC-1 contact reaction. The process conditions and product diesel fraction properties of deep hydro-upgrading technology are listed in Table 2 and Table 3, respectively. It can be seen from the table that the density of hydrogenated stable coal direct liquefied oil diesel fraction is not too high, and the dry point is 342°C. The process conditions adopted by deep hydrogenation upgrading technology are relatively moderate, and the sulfur and nitrogen content of the product diesel fraction are very low. , the content of aromatics is low, and it has reached the index requirements of Class III diesel in the "World Fuel Specification", and its cetane number exceeds 45, which is a qualified diesel product. The hydrogenation upgrading catalyst is RIC-1 and the operation period is 36 months.

Embodiment 2

[0032] The test raw material is hydrogenated stabilized coal direct liquefied oil diesel fraction B, and the properties of the raw oil are listed in Table 1. The deep hydro-upgrading technology is a single-stage double-agent one-pass process, that is, the raw material oil and hydrogen are sequentially contacted and reacted with the hydrofining catalyst RN-10 and the hydro-upgrading catalyst RIC-1. The process conditions and diesel product properties of deep hydrogenation technology are listed in Table 2 and Table 3, respectively. It can be seen from the table that the diesel fraction of direct coal liquefaction oil has a high density and high impurity content, and the process conditions for deep hydrogenation and upgrading are relatively harsh. The content of sulfur and nitrogen in the product diesel fraction is very low, and the content of aromatics is low, reaching " According to the index requirements of Class III diesel oil in the World Fuel Specification, a cetane number ...

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Abstract

Production of high-cetane diesel oil from coal is carried out by filtering direct-liquefied diesel oil fraction of hydrogenated stabilized coal, mixing with hydrogen, contacting with hydrogenation refined catalyst and hydrogenation modified catalyst, separating out effluent from hydrogenation modified reactor to obtain naphtha fraction and diesel fraction, and returning hydrogen-enriched flow into diesel hydrogenation modified reactor. It is simple and fast, has better dearomatization and denitrification functions.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of liquid hydrocarbons obtained by destructive hydrogenation of coal. More specifically, a method of producing diesel from coal liquefied oil. Background technique [0002] As early as 1913, Germany had started research on the technology of producing liquid hydrocarbons by direct liquefaction of coal, 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 a variety of direct coal liquefaction processes have been developed successively. The IGOR process developed in Germany uses online hydrogenation and upgrading of direct coal liquefied oil. The process conditions are relatively harsh, and diesel products with a cetane number of 45 are produced. The NEDO process developed by Japan uses two-step hydrogen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/06
Inventor 胡志海门卓武董建伟陈水银孟勇新聂红毛以朝
Owner CHINA PETROLEUM & CHEM CORP
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