Upflow type hydrogenation thermal cracking method with characteristic of high-aromatic-carbon-rate poor-quality hydrocarbon branching feeding

A high aromatic carbon rate, up-flow technology, applied in hydrotreating process, treatment of hydrocarbon oil, petroleum industry, etc., can solve the problems of large reaction heat, unreported, high gas yield and condensate yield, etc.

Active Publication Date: 2016-11-30
洛阳瑞华新能源技术发展有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Chinese patent ZL201010217358.1, all fractions in coal tar above 370°C are used as hydrocracking raw materials to enter the hydrocracking reaction process, but because of the low hydrogen content of the raw material oil and low content of hydrogen-donating hydrocarbons, the , the total hydrogen consumption is large, the reaction heat is large, the reaction temperature rise is large, the thermal condensation reaction is too much, the gas yield and the condensation product yield are large, and it is not an excellent diluent and hydrogen donor.
[0033] Method of the present invention has no report

Method used

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  • Upflow type hydrogenation thermal cracking method with characteristic of high-aromatic-carbon-rate poor-quality hydrocarbon branching feeding
  • Upflow type hydrogenation thermal cracking method with characteristic of high-aromatic-carbon-rate poor-quality hydrocarbon branching feeding
  • Upflow type hydrogenation thermal cracking method with characteristic of high-aromatic-carbon-rate poor-quality hydrocarbon branching feeding

Examples

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Effect test

Embodiment 1

[0491] Based on Comparative Example 1, according to the present invention, the distillate oil of coal tar F00 with a conventional boiling point greater than 355° C. is used as inferior hydrocarbon HDS, and the inferior hydrocarbon HDS is divided into the first one with a volume ratio of 50:50. The first path of inferior hydrocarbons HDS1 and the second path of inferior hydrocarbons HDS2.

[0492] Based on Comparative Example 1, add the suspended bed pre-hydrocracking reactor R101E of the first inferior hydrocarbon HDS1, and the space velocity of the reactor R101E is: 2.0h for the first inferior hydrocarbon HDS1 -1 , HDS space velocity for total inferior hydrocarbons is 4.0h -1 , so the total space velocity of the three suspended bed hydrogenation reactors R101E, R102E, R103E operated in series is: the total inferior hydrocarbon HDS is 0.8h -1 .

[0493] Table 6 shows the reaction temperature of hydrothermal cracking in Example 1.

[0494] The effect of this embodiment is: ...

Embodiment 2

[0501] Embodiment 1 was improved by adopting Chinese patent ZL201210022921.9, a method for hydrogenation and lightening of heavy oil with low hydrogen content using hydrogen-donating hydrocarbons.

[0502] In the coal tar F00 separation part FRAC, coal tar F00 is separated into a light fraction F0L mainly composed of hydrocarbons with a conventional boiling point of 60-355°C, and a medium-low temperature coal tar middle fraction F0M mainly composed of hydrocarbons with a conventional boiling point of 355-435°C And the heavy fraction F0D mainly composed of hydrocarbons with a conventional boiling point greater than 435°C, the heavy fraction F0D is used as inferior hydrocarbon HDS; the middle fraction F0M enters the pre-hydrogenation process RF0M to be converted into hydrogenation reaction effluent RF0M-P, hydrogenation reaction effluent RF0M-P enters the first hydrogenation reaction process R10.

[0503] The operating conditions of the pre-hydrogenation process RFOM are: temper...

Embodiment 3

[0514] Combined application of a hydrothermal cracking method disclosed in Chinese patent application CN105623724A to produce low-carbon single six-membered ring hydrocarbons from high aromatics, to form a second product solution for Example 2. Compared with Example 2, the hydrocarbon components in the first hydrogenation reaction effluent R10P with a conventional boiling point of 290-355°C are returned to the first hydrogenation reaction process R10 as cracked cycle oil instead of being used as a deep hydrogenation upgrading reaction Process R20 raw materials are used, the effect is:

[0515] ① For the first hydrogenation reaction process R10, the total amount of hydrogen-donating hydrocarbons is increased, which can further increase the ratio KSH of "weight of hydrogen-donating hydrocarbons / weight of coal tar heavy oil HDS1";

[0516] ② Utilize the "selective cracking function" of the hydrothermal cracking reaction process to maximize the production of cyclohexane-based hydr...

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Abstract

The invention relates to an upflow type hydrogenation thermal cracking method with a characteristic of high-aromatic-carbon-rate poor-quality hydrocarbon branching feeding. According to the present invention, the upflow type hydrogenation thermal cracking method is suitable for the suspension bed hydrogenation thermal cracking process R10 of coal tar heavy oil having the high contents of metals, polycyclic aromatic hydrocarbons, colloid and asphaltene and having the conventional boiling point of higher than 450 DEG C, wherein the R10 comprises two or a plurality of operation series connecting sub-hydrogenation reaction zones such as a first sub-hydrogenation reaction zone R101, a second sub-hydrogenation reaction zone R102 and the like, poor-quality hydrocarbon HDS is divided into the two-branch raw material such as HDS1 and HDS2 or multi-branch raw material, the HDS1 enters the R101, and the obtained reaction effluent R101P or the stream R101PX containing the hydrogenation generation oil of the R101P enters the R102 and contacts the HDS2, such that the concentration of the fresh raw material HDS2 in the R102 liquid phase can be reduced, the ratio of the hydrogen supply hydrocarbon weight to the fresh raw material HDS weight in the SHS flowing-through reaction zone can be significantly increased when the R101 uses the hydrogen supply hydrocarbon stream SHS, and the thermal condensation coking rate can be reduced.

Description

technical field [0001] The present invention relates to an upflow hydrothermal cracking method for split feed of low-quality hydrocarbons with high aromatic carbon content, which is suitable for coal tar heavy oil with high content of metals, polycyclic aromatic hydrocarbons, colloids and asphaltenes, whose conventional boiling point is higher than 450°C HDS suspension bed hydrothermal cracking reaction process R10, R10 includes 2 or more first and second sub-hydrogenation reaction zones R101, R102, etc. operated in series, and inferior hydrocarbon HDS is divided into two or more split feedstocks HDS1, HDS2, HDS1 enters R101 to obtain the reaction effluent R101P or the stream R101PX containing its hydrogenated oil to enter R102 to contact with HDS2, which can reduce the concentration of fresh raw material HDS2 in the R102 liquid phase. When R101 uses the hydrogen-donating hydrocarbon stream SHS , can significantly increase the ratio of "hydrogen-donating hydrocarbon weight / fre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
CPCC10G67/00
Inventor 何巨堂
Owner 洛阳瑞华新能源技术发展有限公司
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