Joint processing technique for coal and stone oil

A petroleum and naphtha technology, which is applied in the petroleum industry, the preparation and refining of liquid hydrocarbon mixtures to remove heteroatoms, etc., can solve the problems of increasing coking tendency, reducing equipment utilization rate, unfavorable transportation, etc., and achieve the reduction of secondary cracking , improve high temperature performance, avoid the effect of secondary cracking

Active Publication Date: 2008-07-16
CHNA ENERGY INVESTMENT CORP LTD +1
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Problems solved by technology

[0006] First, the properties of solvent oil directly affect the properties of coal slurry. In the direct liquefaction process of coal alone, the circulating solvent oil used to prepare coal slurry is required to have an appropriate viscosity, generally less than 40mm 2 /s (80°C), and the viscosity of residual oil is much higher than that of coal liquefaction circulating solvent oil (refer to the typical residual oil listed in Table 1). When preparing coal slurry, on the one hand, the proportion of coal powder in the coal slurry will be greatly reduced. Usually, the content of coal powder in the coal slurry can only be controlled below 40m%, or even below 35%. Using this low-concentration coal slurry raw material It is equivalent to reducing the processing capacity of the direct coal liquefaction device and reducing the utilization rate of the equipment, which is not conducive to fully reflecting the va

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  • Joint processing technique for coal and stone oil
  • Joint processing technique for coal and stone oil
  • Joint processing technique for coal and stone oil

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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those skilled in the art can understand that the present invention is not limited to specific embodiments.

[0034] The characteristics of the process of direct coal liquefaction to directly produce fuel oil: (1) The content of aromatics in the liquefied oil is high, the cetane number of diesel oil is low, and the sulfur content is low. In order to increase the cetane number of diesel oil, it is usually necessary to selectively hydrocrack the produced oil, but this leads to a decrease in liquid product yield, an increase in gas yield, and an increase in hydrogen consumption, which reduces product output and increases processing costs. Even so, the cetane number of diesel can only be increased to about 40, and it is impossible to produce products that meet the current automotive diesel standards (requiring a cetane number higher tha...

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Abstract

The invention relates to a method for processing coal and petroleum together and comprises the following steps: (1) coal power and solvent oil are prepared into coal slurry; (2) the coal slurry is done with hydrogenation reaction and lytic reaction; (3) petroleum products are done with the hydrogenation reaction after the products in the step (2) are done with solid-removing; (4) fraction with the temperature of 350-520 DEG C in the fraction of the step (3) products is taken as the solvent oil circularly; wherein, the solvent oil of the step (1) further comprises residual oil from the petroleum and the naphthenic base residual oil is the best. By adopting the method of the invention, the residual oil can be transformed fully, the density of the coal slurry keeps high and the fuel production rate of high quality engines can be improved.

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Claims

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Application Information

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IPC IPC(8): C10G1/06C10G45/02
Inventor 朱豫飞任相坤金嘉璐黄剑薇袁明张传江高山松李永伦王洪学
Owner CHNA ENERGY INVESTMENT CORP LTD
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