Method for conversion of low-hydrogen heavy oil to light fractions by hydrogenation with hydrogen-supplying hydrocarbons

A technology for supplying hydrogen hydrocarbons and hydrogen content, which is applied in the treatment of hydrocarbon oil, hydrotreating process, petroleum industry, etc., can solve the problems of high cracking reaction probability, low heat transfer agent efficiency, and low reaction heat, etc.

Active Publication Date: 2012-07-18
洛阳瑞华新能源技术发展有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0017] ③ One of the disadvantages is that "coal tar fractions with a conventional boiling point of 370-450°C" are rich in polycyclic aromatic hydrocarbons and colloids, have poor thermal stability, and poor hydrogen supply capacity. The ability to inhibit coking during the heating process is poor, and the coal tar and heavy oil heating furnace tubes are easy to coke;
[0018] ④ The second disadvantage is that "coal tar fraction with a conventional boiling point of 370-450°C" is rich in polycyclic aromatic hydrocarbons, colloids, and has poor hydrogen supply capacity. Effectively inhibit the "thermal condensation reaction" of cracking fragments, high coke yield and high gas yield;
[0019] ⑤ The third disadvantage is that the "coal tar fraction with a conventional boiling point of 370-450°C" is rich in polycyclic aromatic hydrocarbons and colloids, which itself is an excellent raw material for hydrorefining, which can be converted into excellent hydrocracking Raw materials, such processing has high liquid yield and low gas yield; patent application 201010217358.1 directly introduces the 370-450°C fraction in coal tar into the hydrocracking process, making it undergo non-ideal hydrofining-hydrocracking process, because the dominant function of the suspension bed hydrocracking process in patent application 201010217358.1 is "cracking", which is suitable for the suspension bed hydrogenation catalyst and reaction system function (apparent hydrofinishing function and hydrocracking function) of coal tar heavy oil, It is usually not optimal for coal tar fractions at 370-450°C. For example, the regional operating temperature of the suspended bed hydrogenation process of coal tar heavy oi

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  • Method for conversion of low-hydrogen heavy oil to light fractions by hydrogenation with hydrogen-supplying hydrocarbons
  • Method for conversion of low-hydrogen heavy oil to light fractions by hydrogenation with hydrogen-supplying hydrocarbons

Examples

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Embodiment 1

[0367] This embodiment illustrates the present invention by taking the low-temperature coal tar whose byproduct properties are as shown in Table 2 of the large-scale vertical furnace blue charcoal production plant of Sinosteel Group Anshan Thermal Energy Research Institute and Hubei Huanggang Huaxing Metallurgical Kiln Co., Ltd. as an example.

[0368] Taking the processing of 500,000 tons / year low-temperature coal tar as an example, about 75,000 tons / year of coal-based heavy oil with a conventional boiling point higher than 482°C and coal tar light fraction with a conventional boiling point lower than 482°C are obtained by fractionating low-temperature coal tar.

[0369] Coal tar light fractions with a conventional boiling point lower than 482°C enter the coal tar light fraction hydrotreating process HPU1. The process conditions of the hydrogenation unit are shown in Table 3 to Table 7. The oil produced by separation and hydrofinishing is obtained from gas, liquefied petroleum ...

Embodiment 2

[0375] Based on Example 1, the light distillate oil less than 370°C in the hydrogenation reaction product of the suspended bed or bubbling bed enters the coal tar distillate oil hydrotreating process HPU1 for joint processing to produce gas, liquefied gas, naphtha, diesel components, Hydrofined tail oil, etc. Distillate oil with a normal boiling point greater than 370°C in the suspension bed or bubbling bed hydrogenation reaction product enters the suspension bed or bubbling bed hydrogenation reaction process HPU21 for cyclic cracking.

[0376] Compared with Example 1, the upgrading process of the light oil produced by suspension bed hydrocracking and the hydrotreating process HPU1 of coal tar distillate oil are combined, which simplifies the process.

Embodiment 3

[0378] Based on Example 2, the light oil final boiling point of the oil produced by suspension bed hydrocracking is increased, that is, the light fraction oil with a conventional boiling point less than 450°C in the suspension bed or bubbling bed hydrogenation reaction product enters the aforementioned coal tar fraction Oil hydrorefining process HPU1 combined processing to produce gas, liquefied gas, naphtha, diesel components, hydrorefined tail oil, etc.

[0379] Compared with Example 2, the hydrogenation load of HPU1 in the hydrofinishing process is increased, the proportion of solvent oil in the raw material oil of HPU21 in the suspension bed hydrocracking process is increased, and the hydrogenation load of the suspension bed hydrocracking process is reduced.

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Abstract

The invention relates to a method for conversion of low-hydrogen heavy oil to light fractions by hydrogenation with hydrogen-supplying hydrocarbons, which is a process for conversion of heavy oil such as coal pitch by hydrogenation with hydrogen-supplying hydrocarbon stream enriched in hydrogen-supplying hydrocarbons. The method has the effects of inhibiting condensation coking speed, increasing liquid product yield in the process of conversion of coal tar heavy oil to light fractions, improving product quality, reducing reaction temperature increase and enhancing stability and safety of device operation. The hydrogen-supplying hydrocarbon stream can be hydrogenation reaction effluents in partial hydrogenation saturation process of bicyclic aromatic hydrocarbons or polycyclic aromatic hydrocarbons or oil products enriched in partial saturated aromatic hydrocarbons obtained in the separation process of bicyclic aromatic hydrocarbons or polycyclic aromatic hydrocarbons. The precursor substance of hydrogen-supplying solvent oil is coal tar fractions with boiling points of 350-450 DEG C, and the hydrogen-supplying solvent oil mainly comprises hydrocarbon components with ordinary boiling points of 350-450 DEG C. The combination of the method for conversion of coal tar heavy oil to light fractions by hydrogenation and method for conversion of coal tar light fractions by hydrogenation constitutes a novel combined process for conversion of full-range fractions of coal tar by hydrogenation.

Description

technical field [0001] The present invention relates to a method for hydrogenation and lightening of low-hydrogen-content heavy oil using hydrogen-donating hydrocarbons; in particular, the present invention relates to a method for using hydrogen-donating hydrocarbons for coal tar heavy oil (gum-rich oil with a conventional boiling point greater than 450° C. In the hydrogenation and lightening reaction process, the presence of hydrogen-donating hydrocarbons can disperse coal tar heavy oil and crack small molecules to reduce its polycondensation probability and improve the overall raw material The hydrocarbon hydrogen content reduces the hydrogenation load, accelerates the hydrogen transfer rate and inhibits the condensation of coal tar heavy oil pyrolysis fragments, etc., which can improve the retention rate of pyrolysis molecules (that is, increase the yield of light oil products), reduce the condensation solid yield, Shorten the reaction process time, reduce the total tempera...

Claims

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Application Information

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IPC IPC(8): C10G65/02
Inventor 何巨堂
Owner 洛阳瑞华新能源技术发展有限公司
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