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Method for producing gasoline and diesel oil through hydrogenation of coal tar

A technology for coal tar and gasoline, used in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of high operating pressure and large investment, and achieve the effect of improving cetane number and reducing pollution

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method to process the whole fraction of coal tar is mainly used to pretreat coking raw materials, not for the purpose of directly producing products, and this method has high operating pressure and large investment

Method used

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  • Method for producing gasoline and diesel oil through hydrogenation of coal tar
  • Method for producing gasoline and diesel oil through hydrogenation of coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The distillate at 200°C to 375°C is contacted with the catalyst A in the hydrogenation protection reactor and the catalyst B in the first hydrofining reactor to react, and the reaction effluent is denoted as D. The light fraction <200°C is mixed with the effluent D and hydrogen and then enters the second hydrofining reactor, and contacts the catalyst G and the catalyst C in the second hydrofinishing reactor for reaction. The reaction effluent is separated and fractionated to obtain gasoline fraction and diesel fraction. The specific reaction conditions are shown in Table 3, the properties of gasoline products are shown in Table 4, and the properties of diesel products are shown in Table 5.

[0045] It can be seen from Table 4 that the density of the product gasoline fraction is 0.7885g / cm 3 , The sulfur content is less than 10μg / g, and the research octane number is 87.0, which is 8 units lower than the light fraction in coal tar feedstock. It can be seen from Table 5 that...

Embodiment 2

[0047] The distillate at 200°C to 375°C is contacted with the hydrogenation protection catalyst A and the catalyst B in the first hydrogenation reactor to react, and the reaction effluent is denoted as E. The light fraction <200°C is mixed with the effluent E and hydrogen and then enters the second hydrogenation reactor, and contacts the catalyst G and the catalyst C in the second hydrogenation reactor for reaction. The reaction effluent is separated and fractionated to obtain gasoline fraction and diesel fraction. The specific reaction conditions are shown in Table 3, the properties of gasoline products are shown in Table 4, and the properties of diesel products are shown in Table 5.

[0048] It can be seen from Table 4 that the density of the product gasoline fraction is 0.7902g / cm 3 , The sulfur content is less than 10μg / g, and the research octane number is 88.5, which is 6.5 units lower than the light fraction in coal tar feedstock. It can be seen from Table 5 that the cetan...

Embodiment 3

[0050] The distillate at 200°C to 375°C is contacted with the hydrogenation protection catalyst A and the catalyst B in the first hydrogenation reactor for reaction, and the reaction effluent is denoted as F. The light fraction <200°C is mixed with the liquid effluent F and hydrogen and then enters the second hydrogenation reactor, and contacts the catalyst G and the catalyst C in the second hydrogenation reactor for reaction. The reaction effluent is separated and fractionated to obtain gasoline fraction and diesel fraction. The specific reaction conditions are shown in Table 3, the properties of gasoline products are shown in Table 4, and the properties of diesel products are shown in Table 5.

[0051] It can be seen from Table 4 that the density of the product gasoline fraction is 0.7855g / cm 3 , The sulfur content is less than 10μg / g, and the research octane number is 86.5, which is a decrease of 8.5 units compared with the light fraction in the coal tar feedstock. It can be ...

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Abstract

The invention relates to a method for producing gasoline and diesel oil through hydrogenation of coal tar. The method comprises: cutting full-range distillate oil of coal tar into light distillates, medium distillates and heavy distillates, conducting hydrotreatment to the light distillates and medium distillates through segmented feeding, and introducing the medium distillates into a hydrogenating protective reaction area, a first hydrofinishing reaction area and a second hydrofinishing reaction area; leaving the light distillates only to enter the second hydrofinishing reaction area for moderate hydrotreatment. The method of the invention can produce clean diesel oil with low sulfur and high cetane value, and can simultaneously give consideration to produce gasoline blending components, thus providing an application approach with a higher added value for processing and utilization of coal tar and alleviating the current tense supply-demand situation of petroleum-based gasoline and diesel oil.

Description

Technical field [0001] The invention relates to a method for hydrotreating coal tar, in particular to a method for producing low-sulfur and high cetane number clean diesel from coal tar while simultaneously producing high-octane number gasoline. Background technique [0002] With the sustained and rapid development of the social economy, my country's demand for petroleum products is also increasing. However, oil is a non-renewable energy source and is facing a crisis of depletion. In contrast, China has abundant coal reserves. Therefore, the production of liquid fuels from coal has become a basic direction of coal processing and utilization. [0003] On the other hand, with the rapid growth of the international and domestic steel industry, the coking industry is showing a trend of high growth. The output of coal tar is increasing, and the clean processing and effective utilization of coal tar are becoming more and more important. At present, the conventional processing method is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 李猛胡志海张毓莹刘清河聂红
Owner CHINA PETROLEUM & CHEM CORP
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