Method of producing fuel oil by coal tar hydrogenation modifying

A hydrogenation reforming and coal tar technology, which is applied in the fields of hydrogenation treatment process, petroleum industry, gasoline stabilization, etc., can solve the problems of unguaranteed long-term operation, unresolved strong exothermic effect, high asphaltenes and benzene insolubles, and achieves The effect of improving product quality, reducing olefin and aromatic content, and reducing total temperature rise

Active Publication Date: 2009-08-26
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To sum up, the existing coal tar hydrogenation technology mainly has the following problems: a. Full-fraction coal tar colloids, asphaltenes, and benzene insolubles are high, and it is easy to coke during the hydrogenation process, which cannot guarantee long-term operation; b. Strong exothermic effect during tar hydroupgrading has not been resolved

Method used

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  • Method of producing fuel oil by coal tar hydrogenation modifying
  • Method of producing fuel oil by coal tar hydrogenation modifying
  • Method of producing fuel oil by coal tar hydrogenation modifying

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021]The raw material oil is a mixture of catalytic diesel oil and medium and low temperature full distillate coal tar I in a weight ratio of 1:10. The properties are shown in Table 1. The first hydrogenation reactor is filled with HG-1 hydrogenation protection agent and pre-hydrogenation catalyst from top to bottom, and the second hydrogenation reactor is filled with the main hydrogenation catalyst. The filling volume ratio of the three catalysts is 2: 3:10, the hydrogenation reaction conditions and test results are shown in Table 2 and Table 3. The products were cut into light oil fraction (≤205°C), diesel fraction (205°C to 325°C), and heavy oil fraction (>325°C). The composition of gasoline, diesel, and heavy oil after cutting is shown in Table 4.

[0022] Table 1. Properties of hydrogenation raw materials

[0023] project All distillate coal tar I Catalytic diesel Raw oil Exterior color Black, sticky, foul smelling maroon Dark black, foul smell ...

Embodiment 2

[0033] The raw material oil is a mixture of hydrogenated diesel oil and medium and low temperature full-cut coal tar II in a weight ratio of 1:1 and 10:1 respectively. The properties are shown in Table 5. The first hydrogenation reactor is filled with HG-1 hydrogenation protection agent and pre-hydrogenation catalyst from top to bottom, and the second hydrogenation reactor is filled with the main hydrogenation catalyst. The filling volume ratio of the three catalysts is 3: 3:10, the hydrogenation reaction conditions and test results are shown in Table 6 and Table 7. The products were cut into gasoline fraction (≤205°C), diesel fraction (205°C~325°C), and heavy oil fraction (>325°C). The composition and properties of gasoline, diesel, and heavy oil after cutting are shown in Table 8, Table 9, and Table 10. And table 11.

[0034] Table 5. Properties of hydrogenation raw materials

[0035]

[0036]

[0037] Table 6. Coal tar II hydrogenation reaction conditions

[0038]

[0039...

Embodiment 3

[0054] The feedstock oil is a mixture of hydrogenated diesel oil and high-temperature full-distillate coal tar III in a weight ratio of 1:1. The first hydrogenation reactor is filled with HG-1 hydrogenation protection agent and pre-hydrogenation catalyst from top to bottom, and the second hydrogenation reactor is filled with the main hydrogenation catalyst. The filling volume ratio of the three catalysts is 3: 3:10, the hydrogenation reaction conditions and test results are shown in Table 12 and Table 13.

[0055] Table 12, Coal tar III hydrogenation reaction conditions

[0056]

[0057] Table 13 Hydrogenation raw materials and product properties

[0058]

[0059]

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Abstract

The present invention relates to a method for producing fuel oil by utilizing coal tar. It is characterized by that said method includes the following steps: after the whole coal tar in which the moisture and ash are removed and diluting oil are mixed according to a certain mixing ratio, making the obtained mixture be successively passed through a shallow hydrogenation unit with hydrogenation protecting agent and prehydrogenation catalyst and a deep hydrogenation unit with main hydrogenation catalyst, then making the product obtained after deep hydrogenation undergo the processes of high-pressure separation, low-pressure separation and fractionation so as to obtain light-oil fraction, medium-oil fraction and tail-oil fraction, namely obtain low-sulfur low-nitrogen fuel oil and light oil product.

Description

1. Technical Field: [0001] The invention belongs to the field of fuel chemical industry, and specifically relates to a method for producing fuel oil by hydrogenation and upgrading of coal tar. 2. Background technology: [0002] Coal tar is a by-product of industries such as coking, coal chemical and coal gasification. In recent years, my country's mechanical coke output has increased rapidly, and the total output in 2003 has reached 138.79 million tons (the National Bureau of Statistics Express, the coke output is only the output of enterprises above designated size). If the coal tar production rate is calculated on the basis of 3% to 4% of coking coal into the furnace, the annual output of coal tar will reach 5.6-7 million tons. In the next few years, China's local coke production will be completely cancelled. Based on the analysis of the world's coke trade, my country's mechanical coke production will increase year by year. The steady growth of mechanical coke will by-produce a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G65/04C10G7/02
Inventor 李庆华郭朝辉佘喜春朱方明
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
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