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Hydrogen donating thermal cracking method

A technology of thermal cracking and hydrogen supply, which is applied in hydrocarbon oil cracking, petroleum industry, liquid carbon-containing fuel, etc., to achieve the effects of cost saving, product stability improvement and low viscosity

Active Publication Date: 2014-04-02
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a hydrogen-donating thermal cracking method, select a suitable hydrogen-donating agent fraction and carry out hydrogen-donating visbreaking, so as to improve the stability of visbreaking oil and blending and upgrading oil, and improve visbreaking The API° of the generated oil and the modified oil, and the kinematic viscosity of the modified oil at 50°C is 380mm lower than that of the fuel oil 2 / s requirements, so that the export of synthetic crude oil can be carried out under the condition of ensuring its good stability

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Embodiment 1

[0032] Hydrocarbon raw material A (a kind of atmospheric residue, wherein saturated content 16.56wt%, aromatic content 41.74wt%, colloid 30.16wt%, asphaltenes 11.54wt%, Ni+V metal content is 530 μ g / g, sulfur, Nitrogen content is 4.31wt%, 0.71wt% respectively) add hydrogen donor HDA to carry out small test in the laboratory, the reaction temperature is 425 ℃, the reaction is 0.4MPa(G), and the reaction time is 10min. As a result, the spot test grades of the obtained hydrogen-donating thermal cracking oil and modified oil were both grade 2 (determined according to the spot test method for cleanliness and compatibility of residual fuel oil in ASTM D4740), and the hydrogen-donating thermal cracking produced oil and modified oil The kinematic viscosity at 50°C is 119.6mm 2 / s, 88.6mm 2 / s, the API° of hydrogen-donating thermal cracking oil and upgraded oil are 11.3° and 12.5°.

Embodiment 2

[0035] Hydrocarbon feedstock B (a vacuum residue, wherein saturated content 19.89wt%, aromatics 37.58wt%, colloid 29.33wt%, asphaltenes 13.20wt%, Ni+V metal content is 524μg / g, sulfur, Nitrogen contents were 3.26wt%, 0.72wt%, respectively). The addition of hydrogen donor HDB was carried out in a small test in the laboratory. The reaction temperature was 425°C, the reaction was 0.4MPa(G), and the reaction time was 5min. As a result, the spot test grade of the obtained hydrogen-donating thermal cracking oil is grade 2, and the kinematic viscosity at 50°C is 1502.6mm 2 / s, API° is 10.6°, the spot test grade of hydrothermal cracking upgraded oil is grade 1, and the kinematic viscosity at 50°C is 128.3mm 2 / s, API° is 14.7°.

Embodiment 3

[0038]Hydrocarbon feedstock B (a vacuum residue, wherein saturated content 19.89wt%, aromatics 37.58wt%, colloid 29.33wt%, asphaltenes 13.20wt%, Ni+V metal content is 524μg / g, sulfur, Nitrogen contents were 3.26wt%, 0.72wt%, respectively). Add hydrogen donor HDB to carry out continuous device test in the laboratory. The reaction temperature is 423-425°C, the reaction is 0.6MPa(G), and the feed flow rate is 15-18g / min. The properties of the obtained products are shown in Table 3.

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Abstract

The invention relates to a hydrogen donating thermal cracking method. According to the method, a hydrogen donating thermal cracking reaction is carried out by adding a hydrogen donator to routine viscosity reduction cracking raw materials as a mixed charging material, and hydrogen donating thermal cracking generated oil is blended with gasoline fractions and diesel oil fractions obtained in atmospheric and vacuum distillation to obtain hydrogen donating thermal cracking modified oil, wherein the hydrogen donating thermal cracking reaction temperature is 380-510DEG C, the reaction residence time is 0.1-180min, and the reaction pressure is 0.1-4.0MPa; the hydrogen donator is virginal gas oil (VGO) or a narrow fraction of the VGO; the distillation range is between 350DEG C and 500DEG C; the hydrogen distribution is that the HA amount accounts for 18.0-50.0% of the total hydrogen amount in the hydrogen donator and the Halpha amount accounts for 18.0-50.0% of the total hydrogen amount in the hydrogen donator; and the addition amount of the hydrogen donator accounts for 0.1-50% of the weight of the viscosity reduction cracking raw materials. The method can substantially reduce the viscosity of viscosity reduction cracking products and improve the stability of the products.

Description

technical field [0001] The invention relates to a hydrogen-donating thermal cracking method, in particular to a thermal cracking process in which a hydrogen-donating agent is added in conventional visbreaking. Background technique [0002] At present, the purpose of heavy oil processing is to lighten residual oil, and convert heavy raw materials into various clean oil products and chemical raw materials with wide applications through heavy oil processing. Modern heavy oil processing is a systematic project involving many refining processes. Visbreaking, as a mild thermal conversion process, is usually used to reduce the viscosity of residual oil to produce fuel oil. The purpose is usually: 1) reduce fuel oil production; 2) improve fuel oil quality (reduce viscosity, improve pour point); 3) increase the maximum production of distillate oil less than 350°C. As a shallow thermal processing of heavy oil, visbreaking of heavy oil is a residual oil processing technology in which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/34C10L1/04
Inventor 王宗贤付兴国高飞沐宝泉郭爱军王齐张艳梅侯经纬刘银东
Owner PETROCHINA CO LTD