Method for simultaneously separating gasoline and diesel components by simulated moving bed

A simulated moving bed and simultaneous separation technology, applied in the petroleum industry, refined hydrocarbon oil, etc., can solve the problems of olefin or aromatic resource waste, complex process flow, large equipment investment, etc., achieve low desorbent consumption, high separation purity, The effect of low investment cost

Pending Publication Date: 2022-07-12
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The above-mentioned processing methods for gasoline and diesel upgrading, whether it is hydroprocessing or adsorption separation technology, have problems such as waste of olefin or aromatic resources, high energy consumption, complicated process flow, and large equipment investment.

Method used

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  • Method for simultaneously separating gasoline and diesel components by simulated moving bed
  • Method for simultaneously separating gasoline and diesel components by simulated moving bed
  • Method for simultaneously separating gasoline and diesel components by simulated moving bed

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Referring to the accompanying drawings, the adsorption tower is divided into 12 beds according to the liquid flow direction, and each bed is connected with 5 material inlet and outlet pipelines, including gasoline and diesel mixed raw materials F2, desorbent D, raffinate R1, extraction liquid E, flushing liquid U, the whole adsorption tower is divided into four zones, the adsorption zone, the refining zone, the desorption zone and the isolation zone are set according to the number of 3-4-3-2 bed layers. The gasoline and diesel mixed feedstock F2 is first injected into the top bed of the adsorption zone. After the material passes down the aromatic hydrocarbon adsorbent, the gasoline and diesel aromatic components are adsorbed on the adsorbent to obtain high-purity gasoline and diesel non-aromatic components from the bottom bed of the adsorption zone. The layer is extracted as raffinate R1 (non-aromatic hydrocarbon components); the adsorbed aromatic hydrocarbon adsorbent e...

Embodiment 2

[0057] Referring to the accompanying drawings, the adsorption tower is divided into 12 beds according to the liquid flow direction, and each bed is connected with 6 material inlet and outlet pipelines, including diesel raw material F1, gasoline raw material F2, desorbent D, raffinate R1, extraction liquid E, For the flushing liquid U, the entire adsorption tower is divided into five zones, the adsorption zone I, the adsorption zone II, the refining zone, the desorption zone and the isolation zone are set according to the number of 3-3-1-3-2 bed layers. Diesel feedstock F1 and gasoline feedstock F2 are first injected into the top bed of adsorption zone I and the top bed of adsorption zone II, respectively. After the material passes through the aromatic hydrocarbon adsorbent downward, the gasoline and diesel aromatics components are adsorbed on the adsorbent, among which the gasoline The non-aromatic components replace the diesel non-aromatic components on the aromatic adsorbent ...

Embodiment 3

[0066] Referring to the accompanying drawings, the adsorption tower is divided into 12 beds according to the liquid flow direction, and each bed is connected with 6 material inlet and outlet pipelines, including gasoline raw material F1, diesel raw material F2, desorbent D, raffinate R1, extraction liquid E, For the flushing liquid U, the entire adsorption tower is divided into five zones, the adsorption zone I, the adsorption zone II, the refining zone, the desorption zone and the isolation zone are set according to the number of 3-3-1-3-2 bed layers. The gasoline feedstock F1 and diesel feedstock F2 are first injected into the top bed of the adsorption zone I and the top bed of the adsorption zone II respectively. After the material passes through the aromatic hydrocarbon adsorbent downward, the diesel oil and gasoline aromatics components are adsorbed on the adsorbent, among which the diesel oil is adsorbed on the adsorbent. The non-aromatic components replace the gasoline n...

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Abstract

The invention relates to a method for simultaneously separating gasoline and diesel components by a simulated moving bed, which is characterized in that gasoline and diesel raw materials subjected to pretreatment to remove impurities enter a simulated moving bed adsorption device for adsorption separation, and the simulated moving bed adsorption device mainly comprises an adsorption area, an isolation area, a desorption area and a refining area. At least one adsorption column is distributed in each area, and gasoline and diesel components are separated at the same time by utilizing a simulated moving bed adsorption device according to the difference of adsorption selectivity of each component in gasoline and diesel to an adsorbent; and adjusting the adsorption separation method according to needs to selectively obtain gasoline non-aromatic hydrocarbon, gasoline light aromatic hydrocarbon, gasoline heavy aromatic hydrocarbon, diesel non-aromatic hydrocarbon and diesel aromatic hydrocarbon components. According to the method, gasoline and diesel oil are classified and managed, all component resources of the gasoline and the diesel oil are reasonably utilized, and the raw material adaptability of the simulated moving bed device is improved.

Description

technical field [0001] The invention relates to a method for simultaneously separating gasoline and diesel components by simulating a moving bed. Background technique [0002] Under the dual pressure of my country's economic slowdown and the rapid development of alternative energy sources, the growth rate of refined oil demand has slowed down, diesel consumption has basically reached its peak, and gasoline consumption is expected to peak around 2025. Different from the refined oil market, basic chemicals such as olefins and aromatics are in strong demand, and domestic production capacity is insufficient, and a large amount of imports are still required. At this stage, the quality of gasoline and diesel in my country has been continuously upgraded, and the requirements for the content of aromatic hydrocarbons and olefins in gasoline and the content of polycyclic aromatic hydrocarbons in diesel are gradually reduced, which will bring challenges to the transformation and upgrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/08
CPCC10G25/08C10G2300/1037C10G2400/02C10G2400/04
Inventor 于海斌赵闯郭春垒李犇李滨孙振海胡智中刘恒汪洋陈自浩
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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