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Heavy oil hydro-conversion method

A hydrogen conversion and heavy oil technology, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems such as difficult to achieve the upgrading effect, achieve the goal of reducing external rejection, reducing environmental pollution, and maintaining catalyst activity Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

CN101993723A discloses a method and device for upgrading inferior heavy oil, which relies on a catalytic cracking unit, sets an inferior heavy oil upgrading reactor, and uses a carbon-deposited catalyst as a heat carrier to form a fluidized inferior heavy oil upgrading process, which can Improve the yield of light oil in the heavy oil conversion process, but it is only suitable for the secondary processing of low-quality heavy oil raw materials with low heavy metal (Ni+V) content
Therefore, if the reaction is carried out under the same reaction conditions, it will be difficult to achieve a better modification effect

Method used

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preparation example Construction

[0034] In the method provided by the present invention, the preparation method of the hydrothermal cracking catalyst comprises: contacting the metal source and the nonmetal source with a sulfidation agent in the presence of a solvent and under sulfidation reaction conditions to obtain the hydrothermal cracking catalyst. Wherein, the metal source is a substance containing V, Ni and lanthanide metal elements and / or Group VIB metal elements, the non-metal source is a substance containing carbon, and the metal source, non-metal source and vulcanizing agent The amount of the metal element contained in the solid product obtained after contacting contains 2-15% by weight of metal elements and 85-98% by weight of non-metallic elements, and based on the weight of the metal elements, the metal elements of more than 95% by weight are V, Ni and lanthanide metal elements and / or Group VIB metal elements; based on the weight of non-metal elements, more than 95% by weight of the non-metal elem...

Embodiment 1-4

[0056] The experimental flow chart is attached figure 1 As shown, two separation devices are used to mix the residual oil raw material with hydrogen, fresh catalyst, and heavy wax oil in the second reactor in the raw material tank, and then transport it to the preheating furnace through a pump, and preheat it to 400°C and enter the first reactor The reaction is carried out, the reaction product of the first reactor enters the separation unit D1, and at least the product of 524°C residual oil in the heavy oil feedstock based on the yield of <524°C distillate oil. The experimental conditions and reaction results are listed in Table 3.

Embodiment 5

[0058] Use as attached figure 2 As shown in the device and process, the first reactor and the second reactor products use the same set of separation equipment D1, and the residual oil raw material, hydrogen, and heavy wax oil from the separation unit are evenly mixed in the raw material tank, and then pumped to the pre-processing stage. The furnace is preheated to a certain temperature and enters the first reactor to react. The reaction product of the first reactor enters the separation unit D1, and at least the product <430°C is separated. The obtained residue is mixed with hydrogen and fresh catalyst and then enters the second Reactor, the reaction product of the second reactor enters the separation unit D1, and separates to obtain light distillate oil, heavy wax oil and residual oil. After the device stabilizes, a small amount of residual oil is thrown out, and the rest is recycled back to the first and second reactors. The experimental conditions and reaction results are ...

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Abstract

The invention provides a heavy oil hydro-conversion method. The method comprises the following steps: (1) a heavy oil raw material and heavy wax oil enter a first reactor in the presence of hydrogen and in the presence or absence of a hydrogen-thermal cracking catalyst to be subjected to a hydrogen-thermal cracking reaction; (2) the reaction product in the first reactor is separated into light distillate, heavy wax oil and residual oil; (3) the residual oil and hydrogen enter a second reactor, and contact with the hydrogen-thermal cracking catalyst to be subjected to a hydrogen-thermal cracking reaction at a relatively low temperature; (4) the reaction product in the second reactor is separated into light distillate, heavy wax oil and residual oil, the separated heavy wax oil is returned to the first reactor, and the separated residual oil part is respectively returned to the two reactors for further reacting according to a proportion; and the reacting temperature in the second reactor is 5-50 DEG C lower than that in the first reactor. Compared with the prior art, the method has the advantages of remarkably improving the heavy oil conversion rate and light oil yield, and improving the light rate of heavy distillate.

Description

technical field [0001] The invention relates to a method for upgrading heavy hydrocarbon oil raw materials, more precisely, relates to a method for realizing lightening of heavy oil by hydrothermal cracking under different reaction conditions. Background technique [0002] With the continuous increase of crude oil production, the increasing market demand for light fuel oil and the increasing environmental protection requirements, refineries are paying more and more attention to the technology of residual oil lightening. There are two types of residual oil lightening methods: thermal processing and catalytic processing. [0003] CN101463267A patent discloses a method of using visbreaking to process heavy oil and realize the lightening of heavy oil. The method is to firstly carry out vacuum distillation on the visbreaking raw material to obtain heavy distillate oil and >540°C vacuum residue, and then The heavy cycle oil is visbroken first and then mixed with the >540°C ...

Claims

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Application Information

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IPC IPC(8): C10G65/10
CPCC10G65/10
Inventor 龙军王子军侯焕娣董明
Owner CHINA PETROLEUM & CHEM CORP
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