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Combined process for processing heavy oil

A technology for hydrogenation of heavy oil and heavy oil, which is applied in the fields of hydrogenation treatment process, petroleum industry, and hydrocarbon oil treatment. And the effect of reducing asphaltene content, reducing carbon residue value, and prolonging the start-up period

Active Publication Date: 2006-10-11
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to solve the problems of harsh operating conditions of heavy oil hydrotreating units in the prior art and the difficulty of using hard asphalt, and develop a new process for the organic combination of decarbonization and hydrogenation of heavy oil, so that the metal content is high. Heavy oil with high content of , colloid and asphaltenes, high carbon residue, high sulfur content and high nitrogen content is processed through a combination of solvent deasphalting process and coking process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Process sand light and heavy oil.

[0038] Shaqian vacuum residue is divided into two parts, of which the one that accounts for 48% by weight of Shaqin vacuum residue's total weight is used as the feed of the solvent deasphalting unit; the other accounts for 52% by weight of Shaqin vacuum residue's total weight After mixing with the deoiled asphalt produced by the solvent deasphalting unit, it is used as the feed of the delayed coking unit; the feed of the heavy oil hydrotreating unit is: a mixture of vacuum wax oil, deasphalted oil and coking heavy oil. The solvent deasphalting test, the delayed coking test and the heavy oil hydrotreating test are all carried out on a medium-sized test device.

[0039] The use of this process route can avoid the sand and light slag directly as the feed of the heavy oil hydrotreating unit, thereby reducing the operating severity of the heavy oil hydrotreating unit, prolonging the operating cycle of the heavy oil hydrotreating unit, and prov...

Embodiment 2

[0055] Process sand light and heavy oil.

[0056]The atmospheric residue is divided into two parts, the part which accounts for 92.5% by weight of the total weight of the atmospheric residue is subjected to vacuum distillation to obtain vacuum wax oil and vacuum residue, and the other part accounts for 7.5% by weight of the total weight of the atmospheric residue. One part goes to the heavy oil hydrotreating unit. The vacuum residue obtained after vacuum distillation is also divided into two parts, of which one part accounting for 50.0% by weight of the total vacuum residue weight is blended with catalytic cracking oil slurry and heavy coking wax oil as the feed of the solvent deasphalting unit. After the feed is deasphalted by the mixed solvent, deasphalted oil is obtained. The yield of deasphalted oil is 84.6%, and the properties are shown in Table 6. The other part, which accounts for 50.0% by weight of the total weight of vacuum residue, enters the heavy oil hydrotreating unit...

Embodiment 3

[0061] This technical solution processes Iranian slag with poor properties. Its processing technology route is that Iranian slag is directly used as the feedstock of the solvent deasphalting unit; deoiled pitch is used as the feedstock of the delayed coking unit; deasphalted oil and coker wax oil are mixed as the feedstock for the heavy oil hydrotreating unit. The oil replaces the original Iranian slag directly into the heavy oil hydrotreating unit. Hydrogenated heavy oil is used as the raw material of the catalytic cracking unit. The solvent deasphalting test, the delayed coking test and the heavy oil hydrotreating test are all carried out on the medium-sized test device.

[0062] Using Iranian slag as the raw material of the solvent deasphalting test device, the solvent used is mainly pentane, mixed with a small part of butane, the weight ratio is 85:15, the test temperature is 175°C, and the pressure is 3.0Mpa. The oil weight ratio is 5.5:1. The main properties of Iranian slag ...

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Abstract

The invention discloses a group technology for heavy oil upgrading, in which the job steps include: (1) full or moiety of heavy oil individually or mixed with catalytic clarified oil entering solvent deasphalting plant, after the solvent deasphalting treatment, obtaining a deasphalted oil and a degreasing asphalt; (2) the degreasing asphalt obtained by step (1) individually or mixed with another moiety of heavy oil entering coking plant for coking treatment, in which the obtained tar heavy oil returns to solvent deasphalting plant or enters heavy oil hydrotreating plant, or moiety of tar heavy oil returns to solvent deasphalting plant and another moiety of tar heavy oil enters heavy oil hydrotreating plant, catalytic plant or hydrocracking plant; (3) the deasphalted oil obtained by step (1) individually or mixed with vacuum residual oil, non-pressure residual oil, pressure-relief residual oil, catalytic cycle stock and one or more than one heavy oil of tar heavy oil obtained by step (2) entering heavy oil hydrotreating plant for hydrotreatment, after hydrotreatment, obtaining fractions of benzin naphtha, plane kerosene and diesel and hydrogenating heavy oil. The invention can improve the charge-in nature, alleviate the operating condition and prolong the cycle length of the heavy oil hydrotreating plant, which provides better raw oil for downstream plants including catalytic plant.

Description

Technical field [0001] The invention belongs to the technical field of petroleum refining, and relates to a technology for processing heavy oil by organically combining decarbonization and hydrogenation processes. Background technique [0002] With the rapid development of the global economy, the demand for light and clean fuel oil is also growing rapidly, and the quality of crude oil is getting worse and worse with the continuous increase of crude oil extraction, which is mainly manifested in high density, high viscosity, and high heavy metal content. , High sulfur content, high nitrogen content, high gum and asphaltene content, which brings greater difficulties to the processing of crude oil. [0003] There are two types of processing techniques for heavy oil processing. One is a hydrogenation process, which mainly includes hydrotreating and hydrofining, and the other is a decarbonization process, which mainly includes solvent deasphalting, coking, and heavy oil catalytic crack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/04
Inventor 黄新龙徐惠秦如意霍宏敏王洪彬胡艳芳赵晓青孟凡东
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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