Heavy oil processing combined process capable of using deasphalted oil efficiently

Abstract

The invention discloses a heavy oil processing combined process capable of using deasphalted oil efficiently, which takes a deasphalted oil solvent extraction process as key technology and organically combines a solvent deasphalting process, a catalytic cracking process, a catalytic cracking oil slurry topping process and an asphalt blending process together to realize the mutual raw material supply and optimization among the processes. The heavy oil processing combined process capable of using the deasphalted oil efficiently effectively solves the problem of the application of deoiled hard asphalt generated in the solvent deasphalting process and improves the operating rate of the solvent deasphalting process. Extract oil which is prepared from low-priced deoiled hard asphalt and catalytic cracking oil slurry by using a solvent extraction process is used for preparing high-grade road asphalt products with a high additional value, so that the rationality and flexibility of the heavy oil processing and the entire economic benefits of the heavy oil processing are improved.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry and relates to a heavy oil processing combined process for efficiently utilizing deasphalted oil. Background technique [0002] Solvent deasphalting process is an important residue decarbonization process, which uses light hydrocarbon solvents to separate the components in atmospheric residue and / or vacuum residue with different solubility under certain conditions. Selectively remove harmful substances such as asphaltenes and heavy metals in residual oil, and obtain deasphalted oil with low metal and carbon residue as raw material for catalytic cracking or other devices, and also obtain a part of oil with high softening point and low penetration deoiled hard asphalt. For the solvent deasphalting process, obtaining high-quality, high-yield deasphalted oil is a universally pursued goal. However, the yield of deasphalted oil and deoiled hard asphalt is always a pair of contradictions....

AI Technical Summary

Problems solved by technology

This patent realizes the mutual supply of raw materials among the various devices, but it has three disadvantages: first, the deasphalted oil is directly used as the raw material of the catalytic cracking unit, which will reduce the light oil yield of the catalytic cracking unit, and produce dry gas and coke. The second is to mix some deoiled hard asphalt with topped light oil slurry for visbreaking to produce fuel oil, which is of low grade and poor benefit; the third is to use topped heavy oil slurry and deoiled hard asphalt to blend to produce roads Asphalt, easily affected by the properties of crude oil, the aging resistance of road asphalt is poor, and the yield of high-grade road asphalt is low

Since the extracted oil obtained from furfural refining of deasphalted oil is used as aromatic hydrocarbon rubber extension oil, it is not used to blend asphalt. Therefore, in essence, heavy traffic roads obtained by blending catalytic cracking oil slurry for solvent Asphalt still uses heavy oil slurry as a soft component, which does not solve the problem of poor aging resistance of road asphalt produced from deoiled asphalt

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