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Catalytic cracking light product desulfurization method and device and method for producing low-sulfur light oil product

A technology of catalytic cracking and light products, applied in the treatment of hydrocarbon oil, petroleum industry, only multi-stage series refining and cracking process treatment, etc., can solve the problems of gasoline octane number loss and low liquid yield, and achieve loss Less, reduce the loss of gasoline yield, save the effect of hydrogen consumption

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is used for catalytic cracking and stable gasoline desulfurization, but there are problems of low catalytic cracking product liquid yield and large loss of gasoline octane number

Method used

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  • Catalytic cracking light product desulfurization method and device and method for producing low-sulfur light oil product
  • Catalytic cracking light product desulfurization method and device and method for producing low-sulfur light oil product
  • Catalytic cracking light product desulfurization method and device and method for producing low-sulfur light oil product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Example 1 illustrates the effect of the desulfurization and separation method for catalytic cracking light products provided by the present invention.

[0083] Use as attached figure 1 The process flow of the adsorption desulfurization unit, the first desulfurization reactor is a fixed fluidized bed reactor, the first desulfurization adsorbent enters the first desulfurization reactor from the bottom, the naphtha raw material and hydrogen enter the first desulfurization reactor from the bottom, and desulfurization Adsorption desulfurization is carried out by contacting the adsorbent, at a reaction temperature of 400°C, a reaction pressure of 2.2MPa, and a weight hourly space velocity of 5h -1 , under the reaction conditions of hydrogen oil volume ratio 45. After the reaction is completed, a mixture of desulfurized naphtha and hydrogen is obtained.

[0084] The second desulfurization reactor is a fixed fluidized bed reactor. The rich gas is preheated to 400°C and enters...

Embodiment 2

[0087] Example 2 illustrates the effect of the desulfurization and separation method for catalytic cracking light products provided by the present invention.

[0088] Use as attached figure 1 And attached figure 2 The flow process of the desulfurization and separation method shown in the adsorption desulfurization unit and the absorption stabilization unit adopts the same reaction process, raw materials and desulfurization adsorbent as in Example 1. The difference is that the first desulfurization reactor is operated at a reaction temperature of 440 ° C. , reaction pressure 1.4MPa, weight hourly space velocity 8h -1 , under the reaction condition of hydrogen oil volume ratio of 100 to obtain desulfurized naphtha.

[0089] The reaction conditions of the second desulfurization reactor are: the reaction temperature is 400°C, the reaction pressure is 0.3MPa, and the weight hourly space velocity is 12h -1 , After the reaction is completed, the desulfurized rich gas is obtained ...

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Abstract

The invention discloses a catalytic cracking light product desulfurization method, a catalytic cracking light product desulfurization device and a method for producing a low-sulfur light oil product, and the catalytic cracking light product desulfurization method comprises the following steps: respectively introducing crude gasoline and rich gas from a catalytic cracking fractionating tower into a first desulfurization reactor and a second desulfurization reactor; respectively contacting with a first desulfurization adsorbent and a second desulfurization adsorbent under a hydrogen condition for desulfurization, and flowing upwards; after the reaction, carrying out gas-solid separation to obtain a spent desulfurization adsorbent, desulfurized crude gasoline and desulfurized rich gas; and the desulfurized rich gas and crude gasoline are respectively sent to an absorption stabilization system for separation, and desulfurized dry gas, liquefied gas and stable gasoline are obtained. The method provided by the invention is flexible to operate and suitable for treating rich gas and crude gasoline obtained by a catalytic cracking fractionating tower, and the obtained low-sulfur gasoline is high in yield and low in octane number loss.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a hydrocarbon oil desulfurization method and device, more specifically, to a catalytic cracking rich gas and naphtha desulfurization and separation method and device. Background technique [0002] The catalytic cracking unit in the refinery is the main source of light olefins, liquefied petroleum gas and gasoline. In the existing catalytic cracking process, the reaction products of the catalytic cracking unit can be fractionated to obtain rich gas, naphtha, light diesel oil, and heavy diesel oil and oil slurry and other components. The rich gas passes through the absorption desorption tower and the reabsorption tower to obtain dry gas products, and the dry gas can be used as refinery fuel gas after desulfurization. Liquefied gas and catalytic cracking stable gasoline can be obtained after the crude gasoline is separated by the absorption and stabilization tower. The catalytic ...

Claims

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Application Information

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IPC IPC(8): C10G53/08C10G55/06
CPCC10G53/08C10G55/06C10G2300/202C10G2300/4006C10G2300/4012C10G2300/4018
Inventor 王文寿毛安国张执刚徐莉刘玉良
Owner CHINA PETROLEUM & CHEM CORP
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