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Process for preparing hihg-quality diesel oil or jet fuel maximumly from coal liquefied oil

A technology for coal liquefied oil and jet fuel, which is applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of high total pressure, high cetane number, and harsh hydrorefining process conditions.

Inactive Publication Date: 2004-08-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The "TECHNOLOGY STATUSREPORT 010-COAL LIQUEFACTION" published by the British Ministry of Trade and Industry in October 1999 introduced the German Kohleoel Process process, which is to hydrogenate coal liquefied oil on-line and recycle part of the product as a hydrogen supply agent to coal Liquefaction system, the diesel fraction in the product has low impurity content and high cetane number, but its hydrofining process conditions are relatively harsh, with a total pressure of up to 30.0MPa

Method used

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  • Process for preparing hihg-quality diesel oil or jet fuel maximumly from coal liquefied oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The filtered coal liquefied oil A and hydrogen enter the stable hydrogenation reactor, contact with the hydrogenation protection agent RG-10A / RG-10B, and the hydrogenation refining catalyst RCT-1, and the effluent of the stable hydrogenation reactor is separated to obtain gas, Naphtha fraction, diesel fraction and tail oil fraction, among which part of the tail oil fraction is recycled back to the coal liquefaction system as a hydrogen donor, and the hydrogen-rich gas stream is recycled back to the stable hydrogenation reactor; the diesel fraction obtained from the stable hydrogenation reactor, the remaining The tail oil fraction and hydrogen enter the deep hydro-upgrading reactor equipped with hydrofinishing agent RN-10 and hydrocracking agent RT-5, contact with RN-10 and RT-5, and separate the hydro-upgrading reactor The effluent is obtained from gas, naphtha fraction, diesel fraction and tail oil fraction. The tail oil fraction is returned to the deep hydro-upgrading ...

Embodiment 2

[0036] The process of this embodiment is basically the same as that of Embodiment 1, the raw material is still coal liquefied oil A, and the final target product is jet fuel. The process conditions and jet fuel product properties of stable hydrogenation and deep hydroupgrading are listed in Table 2 and Table 3, respectively. As can be seen from Table 3, the total yield of jet fuel has reached 50%, and the content of sulfur and nitrogen in the jet fuel fraction in the product is very low, and the indicators such as freezing point, aromatics content and smoke point have reached the requirements, and it is a qualified jet fuel product .

Embodiment 3

[0038] The process of this example is basically the same as that of Example 1, the raw material is still coal liquefied oil B, the final target product is diesel oil, and the deep hydro-upgrading process is one-pass, hydrofinishing agent RN-10 and hydrocracking agent RT -5 were packed in two reactors respectively. The properties of feedstock oil, process conditions and properties of diesel products are listed in Table 1, Table 4 and Table 5, respectively. It can be seen from Table 1 that the coal liquefied oil B is relatively heavy; it can be seen from Table 5 that the total yield of diesel oil is 73%, which realizes the purpose of producing diesel oil in a large amount. The content of sulfur and nitrogen in the diesel fraction is very low, and the content of aromatics is low, which can meet the requirements for sulfur, nitrogen and aromatics content of Class III diesel in the "World Fuel Specifications". The cetane number exceeds 45, which is a qualified diesel product.

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Abstract

A process for preparing high-quality diesel oil or jet fuel from liquefied coal oil with the highest output includes filtering, stable hydrogenation to obtain diesel oil fraction and tail oil fraction, modifying them by deep hydrogenation, separating its product to obtain gas, naphtha fraction, diesel oil fraction, jet fuel, and tail oil fraction, and cyclic use of hydrogen-enriched gas. Its advantages are high output rate of diesel oil (more than 70 wt.%), low contents of S and N, low density and high hexadecane number.

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 or jet fuel from 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. The IGOR process developed in Germany refines coal liquefied oil on-line and directly produces qualified diesel products. Coal liquefied oil produced by other processes must undergo subsequent processing before it can become a qualified fuel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G45/00
Inventor 石玉林胡志海门卓武李大东石亚华熊震霖聂红
Owner CHINA PETROLEUM & CHEM CORP
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