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A method and system for producing aromatics from multiple raw materials

A technology for aromatics and raw materials, which is applied in the field of aromatics production from diversified raw materials to achieve the effect of reducing project investment and improving utilization rate

Active Publication Date: 2018-09-28
BEIJING PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the supply and demand of p-benzene and p-xylene in China are still increasing year by year, and there is still a supply gap

Method used

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  • A method and system for producing aromatics from multiple raw materials
  • A method and system for producing aromatics from multiple raw materials
  • A method and system for producing aromatics from multiple raw materials

Examples

Experimental program
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Effect test

Embodiment 1

[0078] This embodiment provides a system for realizing the method for producing aromatics from multiple raw materials, and its structural diagram is as follows figure 1 shown, from figure 1 As can be seen, the system includes:

[0079] Diesel hydrocracking unit, aromatics complex and light hydrocarbon aromatization unit;

[0080] Wherein, the diesel hydrocracking unit is provided with a hydrogen inlet, a diesel inlet, a fuel gas outlet, a liquefied gas outlet, a light naphtha outlet, and a heavy naphtha outlet;

[0081] Aromatics complex includes naphtha hydrogenation unit, continuous reforming unit, catalyst regeneration unit, aromatics extraction unit, disproportionation and transalkylation unit, adsorption separation unit, isomerization unit and xylene fractionation unit;

[0082] The aromatics complex includes a naphtha inlet, a first mixed aromatics inlet, a heavy naphtha inlet, a hydrogen-containing gas outlet, a fuel gas outlet, a liquefied gas outlet, a pentane outle...

Embodiment 2

[0093] This embodiment provides a method for producing aromatics from multiple raw materials, which includes the following specific steps:

[0094] (1) Diesel hydrocracking process: diesel oil is converted into fuel gas, liquefied gas, light naphtha and heavy naphtha through hydrocracking;

[0095] (2) Aromatics combined process: using naphtha, mixed aromatics and heavy naphtha produced by step (1) diesel hydrocracking process as raw materials, through naphtha hydrogenation, continuous reforming, catalyst regeneration, aromatics extraction, Disproportionation and transalkylation, isomerization, adsorption separation and xylene fractionation processes to obtain hydrogen-containing gas, fuel gas, liquefied gas, pentane, raffinate, heavy aromatics, benzene and p-xylene;

[0096] (3) Light hydrocarbon aromatization process: one or both of light naphtha and liquefied gas obtained in step (1) diesel oil hydrocracking process, and / or light naphtha obtained in step (2) aromatics combi...

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Abstract

The invention provides a method and system for preparing aromatics from diversified raw materials. The method comprises the steps of adopting a diesel hydrocracking process: converting diesel into fuel gas, liquefied gas, light naphtha and heavy naphtha through hydrocracking; adopting an aromatics union process: adopting naphtha, mixed aromatics and heavy naphtha produced through the diesel hydrocracking process as raw materials, and obtaining hydrogen containing gas, fuel gas, liquefied gas, pentane, light naphtha, raffinate oil, heavy aromatics, benzene and paraxylene through naphtha hydrogenation, continuous catalytic forming, catalyst regeneration, aromatics extraction, disproportionation and alkyl shift, adsorption separation, isomerization and an xylene fractionation process; adopting a light hydrocarbon aromatization process: taking one or both of light naphtha and liquefied gas obtained through the diesel hydrocracking process and / or one or a combination of more selected from a group consisting of light naphtha, liquefied gas, pentane and raffinate oil obtained through the aromatics union process as raw materials, and obtaining hydrogen containing gas, propane and mixed aromatics.

Description

technical field [0001] The invention relates to a method and system for producing aromatics from diversified raw materials, belonging to the technical field of petrochemical industry. Background technique [0002] At present, the growth rate of the domestic refined oil market is slowing down, and the consumption diesel-gasoline ratio is decreasing year by year, which is higher than the supply diesel-gasoline ratio. The peak period of diesel use was originally expected to be in 2018, but in fact, 2014 has already come ahead of schedule, and gasoline was originally expected to be in 2025. It may reach its peak in 2020. With the implementation of the National VI standard for gasoline and diesel in the future, the content of olefins and aromatics in gasoline will be further reduced, and there will be some surplus oils rich in aromatics. In recent years, the supply and demand of p-benzene and p-xylene in China are still increasing year by year, and there is still a supply gap. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/30
Inventor 曹坚仇艳华刘戈
Owner BEIJING PETROCHEM ENG