Combined process of hydrotreatment and catalytic cracking for residual oil

A hydrotreating and catalytic cracking technology, applied in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc., can solve the problems of complex device, low conversion rate of fixed bed, complicated operation, etc., to reduce the difficulty of reaction and harsh processing. The effect of reducing the degree, type and number of devices, and improving the response effect

Active Publication Date: 2015-06-17
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the fixed bed conversion rate is low (generally lower than 35%), which mainly provides high-quality raw materials for catalytic cracking units; Oil products need to be further refined to obtain qualified products; suspension bed can obtain higher conversion rate (generally higher than 80%), but the stability of the device is poor, and it is still difficult to achieve industrial stable operation; the conversion rate of moving bed is between Between fixed bed and ebullating bed, the problem is that the device is complicated and the operation is difficult
The disadvantage of this route is that it has poor adaptability to crude oil and is suitable for processing light and some medium sour crude oil
For ebullating bed reactors, each reactor requires a set of online catalyst addition system, which requires a high investment (accounting for about half of the total investment of ebullated bed hydrogenation units after evaluation), and the operation Complex, with the highest failure rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Combined process of hydrotreatment and catalytic cracking for residual oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, the combined process of fluidized bed, fixed bed and catalytic cracking in the hydrotreating of residue oil is used to carry out the hydroconversion of residue oil. Firstly, the residual oil raw material is preheated and then mixed with catalytic cracking heavy distillate oil and hydrogen into the ebullating bed hydroprocessing unit, and the hydrogenation reaction is carried out under the mixing and process conditions of different ebullating bed hydrogenation catalysts prepared to remove the hydrogenation in the raw material. Heteroatoms such as sulfur, nitrogen, and metals, while converting asphaltenes into colloids or smaller molecules, reducing product viscosity, hydrogenation products are separated to obtain liquid-phase modified oil, and the modified oil enters the fixed-bed hydrogenation unit The reaction is carried out, and the oil is obtained under the fixed-bed graded catalyst and reaction conditions. The resulting oil enters the catalytic c...

Embodiment 2

[0047] Compared with Example 1, the ebullated bed reactor uses a mixed catalyst. The long-term stability of the fixed bed is good, see Table 4 for details, and the temperature of the fixed bed reactor was increased by 3°C at 5000, 8000 and 12000 hours.

[0048] Table 5 Stability results of the fixed bed hydrogenation reaction system.

[0049] Example Example 1 Example 2 Operating time, hours Final oil metal content (μg / g) / total pressure drop of fixed bed reaction system (MPa) Final oil metal content (μg / g) / total pressure drop of fixed bed reaction system (MPa) 500 8.5 / 0.06 6.3 / 0.06 5000 8.7 / 0.08 6.8 / 0.06 8000 8.2 / 0.09 5.9 / 0.07 12000 9.1 / 0.11 6.5 / 0.08

[0050] As can be seen from the stability experiment results of the above-mentioned fixed bed reaction system, the method of the present invention can realize the long-term stable operation of the fixed bed hydrotreating unit, and it can be predicted according to the developm...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a combined process of hydrotreatment and catalytic cracking for residual oil. The combined process comprises the following steps: (1) mixing a residual oil raw material and heavy distillate oil of a catalytic cracking unit and allowing an obtained mixture to enter into a fluidized bed hydrotreatment unit for fluidized bed hydrotreatment; (2) allowing an effluent of fluidized bed hydrotreatment obtained in the step (1) to enter into a fixed bed hydrotreatment unit for fixed bed hydrotreatment, wherein generated oil of an effluent of fixed bed hydrotreatment is used as a raw material for the catalytic cracking unit; and (3) mixing the residual oil raw material with a catalytic heavy fraction obtained after dry gas, liquefied gas and catalytic gasoline are separated from an effluent of a catalytic cracking reaction and subjecting an obtained mixture to fluidized bed hydrotreatment. Compared with the prior art, the combined process provided by the invention has the advantages of wide sources of the raw materials, low equipment investment, stable operation, a long operation period and a good synergistic and coordination effect.

Description

technical field [0001] The present invention relates to a combined process method of residue oil hydrotreating and catalytic cracking, specifically organically combining residue oil fluidized bed hydrogenation treatment, fixed bed hydrogenation treatment and catalytic cracking to process inferior residue oil raw materials to produce gasoline products combination process. Background technique [0002] With the increase of heavy and inferior crude oil and the change of market demand structure for light oil, the processing technology of inferior heavy oil (including various heavy oil and residual oil, etc.) has become the research focus of major oil companies and petroleum scientific research institutions direction. The processing of inferior heavy oil is not only to crack it into products with low boiling point, such as naphtha, middle distillate oil and vacuum gas oil, but also to increase their hydrogen-carbon ratio, so the basic way of its processing is basically There ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/04
Inventor 朱慧红方向晨孙素华刘杰杨光金浩
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap