Fixed bed multistage reactor for aromatizing reaction of olefin-containing liquefying gas

A reactor and liquefied gas technology, applied in the field of catalytic conversion reactors, can solve problems that do not involve multi-bed reactor equipment and the like

Inactive Publication Date: 2010-11-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are relatively few patents on fixed-bed multi-stage (stage) reactors for olefin-containing liquefied gas aromatization. Chinese patent CN200810084127.0 applies for a method for producing clean fuel oil using petroleum cracking dry gas and C4 components. The patent discloses The catalyst bed can be divided into two or more sections, and a heat exchanger is installed between the sections; from the second section, a certain amount of dry gas, C4 components, straight-run gasoline, and straight-run diesel oil can be passed into a certain section to adjust the bed. temperature, but does not involve how to set up the multi-bed reactor equipment itself, especially the reactor design of the first stage of the inlet raw material does not involve

Method used

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  • Fixed bed multistage reactor for aromatizing reaction of olefin-containing liquefying gas
  • Fixed bed multistage reactor for aromatizing reaction of olefin-containing liquefying gas
  • Fixed bed multistage reactor for aromatizing reaction of olefin-containing liquefying gas

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Embodiment 1

[0030] Low-temperature production of gasoline from liquefied gas: When the concentration of olefins in liquefied gas (LPG) is 58% (others are alkanes), and the conversion rate of olefins is 90%, the temperature rise of each catalyst bed is controlled to 40°C, design 8 stage fixed bed reactor (such as figure 1 As shown, the experimental results are shown in Table 4). At the same time, the number of stages of the fixed bed reactor can be adjusted according to the LPG circulation amount of the injected saturated liquefied gas accounting for the raw material. The number of levels can be less, generally 4-8 levels.

[0031] Table 4 Example 1 The conversion rate of olefins in each stage of reaction bed is 90%, and the result of adiabatic temperature rise of each stage of bed

[0032]

Embodiment 2

[0034] BTX aromatics from liquefied gas: When the concentration of olefins in liquefied gas (LPG) is 58% (others are alkanes), and the conversion rate of olefins is 90%, the temperature rise of each catalyst bed is pre-controlled to 50°C, and the design 6-stage fixed bed (experimental results are shown in Table 5), similar to the situation of liquefied gas to gasoline, the number of stages of the fixed-bed reactor can be adjusted according to the LPG circulation volume of the injected saturated hydrocarbon accounted for the raw material, if the circulation volume is high, in In the case of maintaining the temperature rise of catalyst beds at all levels at 50°C, the number of fixed-bed reactor stages can be less.

[0035] Table 5 Example 2 The conversion rate of olefins in each stage of the reaction bed is 90%, and the result of the adiabatic temperature rise of each stage of the bed

[0036]

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Abstract

The invention aims to provide a fixed bed multistage quench-type reactor for an aromatizing reaction of olefin-containing liquefying gas, which is characterized in that: the stage number of the fixed bed multistage reactor is determined according to the circulation quantity of saturated hydrocarbon entering the reactor and bed temperature rise in beds controlled in advance by the catalyst beds in the reaction process; and the saturated hydrocarbon is introduced to control the olefin content of the olefin-containing liquefying gas so as to control the temperature rise in the reactive catalyst beds. In the aromatizing reaction of the olefin-containing liquefying gas, the reactor can control the temperature rise in each stage of catalyst bed, so the appropriate reaction performance is obtained, the utilization rate of catalysts is improved, the service life of the catalysts is prolonged, and secondary reactions are reduced.

Description

technical field [0001] The invention relates to a catalytic conversion reactor for petroleum hydrocarbons, in particular to a fixed-bed multistage reactor for aromatization conversion of olefin-containing liquefied gas. Background technique [0002] my country's "West-to-East Gas Transmission" plan and the implementation of civil natural gas pipeline projects have caused a further backlog of excess liquefied gas in refineries, and it is urgent to find a way out, especially the amount of carbon tetraolefins contained in it is less than 50%. In addition, the presence of high content of olefins in liquefied gas also affects the production of liquefied gas for vehicles. Therefore, how to optimize the use of liquefied gas resources in these refineries is one of the problems facing my country's petroleum and petrochemical industries. Catalytic conversion of liquefied gas into high-aromatic high-octane gasoline blending components or BTX (benzene, toluene and xylene) aromatics has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G50/00
Inventor 陈福存刘盛林徐龙伢朱向学安杰张爽王清遐
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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