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A process and system for producing more gasoline and aromatics

A technology of aromatics and process, applied in the field of petroleum refining, can solve the problems of high hydrogen consumption, harsh operating conditions, and ineffective utilization of aromatic components, and achieve the effects of high yield, improved component properties, and significant economic benefits

Active Publication Date: 2021-11-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although common hydrofining or hydroupgrading routes can basically remove sulfur and nitrogen in catalytic diesel oil and increase its cetane number to varying degrees, there are still technical problems such as high hydrogen consumption and harsh operating conditions.
In addition, in catalytic diesel, more aromatic components have not been effectively utilized

Method used

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  • A process and system for producing more gasoline and aromatics
  • A process and system for producing more gasoline and aromatics
  • A process and system for producing more gasoline and aromatics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a process system for producing more gasoline and aromatics, which includes: a heavy oil riser 2 , a first fractionation tower 4 , a hydrogenation reactor 9 , a second fractionation tower 11 and an aromatics extraction device 14 .

[0054] Wherein, the product outlet of the heavy oil riser 2 communicates with the inlet of the first fractionation tower 4;

[0055] The diesel fraction outlet of the first fractionation tower 4 communicates with the inlet of the hydrogenation reactor 9, and the outlet of the hydrogenation reactor 9 communicates with the second fractionation tower 11;

[0056] The heavy fraction 13 outlet of the second fractionation tower 11 communicates with the aromatics extraction unit 14; the raffinate 16 outlet of the aromatics extraction unit 14 and / or the light fraction 12 outlet of the second fractionation tower 11 It communicates with the entrance of the heavy oil riser 2.

Embodiment 2

[0058] combined with figure 1 , present embodiment provides a kind of technique of the technique of producing gasoline and aromatics, it comprises the following steps:

[0059] (1) catalytic cracking

[0060] The heavy oil raw material 1 enters the bottom of the heavy oil riser 2 for catalytic cracking. The reaction conditions of the heavy oil riser 2 are: riser outlet temperature 510°C, agent-oil ratio 6.5, reaction pressure 0.15MPa, and reaction time 3.1s , Atomized water vapor accounts for 3w% of the feed amount.

[0061] After the heavy oil catalytic cracking, the heavy oil catalytic cracking product 3 enters the first fractionation tower 4 for fractionation. The first gas 5, catalytic gasoline 6 and first oil slurry 8 are separated by the first separation tower to the downstream system, and the separated catalytic diesel oil 7 enters the fixed-bed hydrogenation reactor 9 for hydrofining.

[0062] The conditions for hydrofining are:

[0063] (2) Hydrofining

[0064] P...

Embodiment 3

[0075] This embodiment provides a process for producing more gasoline and aromatics, the difference lies in the different parameters, the difference is as follows: the outlet temperature of the heavy oil riser of the catalytic cracking unit is 500°C.

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Abstract

The invention discloses a process and a system for producing more gasoline and aromatics, and relates to the technical field of petroleum refining. Specifically, the process uses catalytic diesel produced by a catalytic cracking unit through hydrogenation, cutting distillation, and extraction of aromatics. , to obtain components with better quality and cracking performance. Compared with catalytic diesel oil and hydrogenated catalytic diesel oil, the properties of this component are significantly improved. The yield of cracked gasoline is higher, and the yield of dry gas and coke is lower. It can be used as feed for heavy oil riser of catalytic cracking unit without deterioration of catalytic cracking. The product distribution of the device, at the same time, will not significantly reduce the processing volume of the heavy oil riser, and has significant economic benefits. In addition, the investment for adding a second riser reactor is also saved, and the catalytic cracking unit does not need to be greatly modified, and the investment cost is relatively low.

Description

technical field [0001] The invention relates to the technical field of petroleum refining, in particular to a process and system for producing more gasoline and aromatics. Background technique [0002] Catalyzed diesel is the main secondary processed diesel component. With the development and changes of domestic market demand and environmental protection requirements, it is more and more difficult to use LCO with low cetane number as a blending component of vehicle diesel. [0003] At present, catalytic diesel is generally used as a blending component to produce automotive diesel after hydrotreating. Although common hydrofining or hydroupgrading routes can basically remove sulfur and nitrogen in catalytic diesel oil and increase its cetane number to varying degrees, there are still technical problems such as high hydrogen consumption and harsh operating conditions. . And in the catalytic diesel, more aromatic components are not effectively utilized. [0004] In view of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/04
CPCC10G67/0418C10G2400/02C10G2400/30
Inventor 孙世源孟凡东闫鸿飞张亚西武立宪张瑞风杨鑫
Owner CHINA PETROLEUM & CHEM CORP