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Method and device for separating 1-octene from Fischer-Tropsch synthetic oil through reaction separation coupling process

A technology for Fischer-Tropsch synthesis of oil and octene, applied in distillation purification/separation, hydrocarbon purification/separation, chemical instruments and methods, etc., can solve the problems of complex process, high energy consumption and equipment cost, and achieve energy consumption and equipment The effect of low cost, improving market competitiveness and high economic efficiency

Active Publication Date: 2019-01-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above-mentioned literature generally has the defects of complicated process, high energy consumption and equipment cost

Method used

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  • Method and device for separating 1-octene from Fischer-Tropsch synthetic oil through reaction separation coupling process
  • Method and device for separating 1-octene from Fischer-Tropsch synthetic oil through reaction separation coupling process
  • Method and device for separating 1-octene from Fischer-Tropsch synthetic oil through reaction separation coupling process

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Experimental program
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Effect test

Embodiment 1

[0067] The present invention is used for the separation and purification process of 1-octene, such as figure 1 As shown, including dividing wall column (T11), azeotropic rectification column (T21), entrainer recovery column (T22), normal hydrocarbon reactor (R31), filter (F32) normal hydrocarbon separator (T33) , normal olefin reactive distillation column (T41), reverse reactive distillation column (T42), condenser, reboiler, pump and related feed pipelines and pipelines connecting the above equipment. The raw material is Fischer-Tropsch synthetic oil light oil, which contains a mixture of hydrocarbons with a carbon number range of C2-C50 and oxygen-containing compounds with a carbon number range of C2-C20. The hydrocarbons mainly include normal alkanes and α-olefins, and also include some isoparaffins, internal olefins, branched olefins, and a small amount of cycloalkanes, aromatics, and cycloolefins. The oxygen-containing compound includes one or more of alcohols, aldehydes...

Embodiment 2

[0070] The present invention is used for the separation and purification process of 1-octene, such as figure 1 As shown, including dividing wall column (T11), azeotropic rectification column (T21), entrainer recovery column (T22), normal hydrocarbon reactor (R31), filter (F32) normal hydrocarbon separator (T33) , normal olefin reactive distillation column (T41), reverse reactive distillation column (T42), condenser, reboiler, pump and related feed pipelines and pipelines connecting the above equipment. The raw material is Fischer-Tropsch synthetic oil light oil, which contains a mixture of hydrocarbons with a carbon number range of C2-C50 and oxygen-containing compounds with a carbon number range of C2-C20. The hydrocarbons mainly include normal alkanes and α-olefins, and also include some isoparaffins, internal olefins, branched olefins, and a small amount of cycloalkanes, aromatics, and cycloolefins. The oxygen-containing compound includes one or more of alcohols, aldehydes...

Embodiment 3

[0073] The present invention is used for the separation and purification process of 1-octene, such as figure 2 As shown, it includes the light removal tower (T12), the weight removal tower (T13), the extractive distillation tower (T23), the extractant recovery tower (T24), the normal hydrocarbon reactor (R31), the filter (F32), the normal Hydrocarbon separator (T33), normal olefin reactor (R41), normal paraffin separation tower (T43), reverse reactor (R42), normal olefin separator (T44), condenser, reboiler, pump and Associated feed lines and lines connecting the above equipment.

[0074]The raw material is Fischer-Tropsch synthetic oil light oil, which contains a mixture of hydrocarbons with a carbon number range of C2-C50 and oxygen-containing compounds with a carbon number range of C2-C20. The hydrocarbons mainly include normal alkanes and α-olefins, and also include some isoparaffins, internal olefins, branched olefins, and a small amount of cycloalkanes, aromatics, and ...

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Abstract

The invention relates to a method and a device for separating 1-octene from Fischer-Tropsch synthetic light-weight oil. The method comprises the following steps: performing narrow fraction cutting toobtain C8 narrow fraction; removing an oxygen-containing compound by extractive distillation or azeotropic distillation; adding a reactant for converting a kind of substances into a derivative thereof, and obtaining C8 n-hydrocarbon through a reversible reaction auxiliary separation method; performing a reaction distillation method to separate a 1-octene converted olefin derivative from alkane; and performing reversible reaction on the olefin derivative to re-obtain a 1-octane product. By virtue of the reversible reaction auxiliary separation method, the separating problem for a mixture with extremely close boiling points or an azeotropic mixture is converted into the separating problem with for a mixture with relatively great boiling point difference. By virtue of a method of narrow fraction cutting, extraction / azeotropic distillation and reaction separation coupling, the 1-ocetne product with a high additional value is separated out from Fischer-Tropsch synthetic oil; and meanwhile,the energy consumption and the equipment cost are relatively low, so that relatively high economic benefits can be created.

Description

technical field [0001] The invention relates to a method for separating and purifying 1-octene from Fischer-Tropsch synthetic oil, which is especially suitable for the process of producing high-purity 1-octene from coal-based raw materials. Background technique [0002] Fischer-Tropsch synthesis is the indirect coal liquefaction process, in which the synthesis gas (CO, H 2 ) into gasoline, diesel and other hydrocarbon products. The reaction crude products are mainly light oil, heavy oil and heavy wax. Among them, the main substances in light oil are normal alkanes and normal olefins, and the olefin components are mostly α-olefins. When conventional naphtha and diesel are the main products, olefins need to be hydrotreated. If appropriate methods can be used to separate the required α-olefin components from the product to further produce high-value products, the economic benefits of the process will be greatly improved. [0003] At present, China does not have the ability ...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C7/04C07C7/06C07C7/08C07C7/148C07C7/152C07C11/02
CPCC07C7/005C07C7/04C07C7/06C07C7/08C07C7/14825C07C7/152C07C11/02Y02P20/10
Inventor 高鑫赵悦袁炜蔡力宏刘素丽李洪李鑫钢
Owner TIANJIN UNIV
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