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Process for the separation of aqueous phase by-product of fischer-tropsch synthesis reaction

A technology of Fischer-Tropsch synthesis and separation method, which is applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., and can solve the problems of environmental pollution and uneconomical direct discharge of water-phase by-products of Fischer-Tropsch synthesis reaction.

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem that the current Fischer-Tropsch synthesis reaction water phase by-product is directly discharged uneconomical and pollutes the environment, and a new method for separating the Fischer-Tropsch synthesis reaction water phase by-product is provided

Method used

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  • Process for the separation of aqueous phase by-product of fischer-tropsch synthesis reaction
  • Process for the separation of aqueous phase by-product of fischer-tropsch synthesis reaction
  • Process for the separation of aqueous phase by-product of fischer-tropsch synthesis reaction

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Embodiment 1

[0015] according to figure 1 As shown in the flow process, Fischer-Tropsch synthesis aqueous phase by-product 8 (components with a boiling point less than 40°C, components with a boiling range of 50 to 120°C and components with a boiling point greater than 120°C account for 5%, 85% of the weight composition respectively and 10%) enter the common rectifying column 1 that the number of theoretical plates is 15, the feeding position is the 7th theoretical plate, the reflux ratio is 12, the control tower top temperature is 40 DEG C, and the side line is taken from the 8th theoretical plate The fraction 11 with a boiling range of 50-120°C exits, and the side stream fraction 11 enters a dividing column with a theoretical plate number of 50. The theoretical plate number on the upper part of the dividing plate is 10, and the number of theoretical plates on the lower part is also 10. The upper left side of the dividing plate is The liquid phase distribution fraction is 0.7, the gas pha...

Embodiment 2

[0019] according to figure 1As shown in the flow process, Fischer-Tropsch synthesis aqueous phase by-product 8 (components with a boiling point less than 40°C, components with a boiling range of 50 to 120°C and components with a boiling point greater than 120°C account for 5%, 85% of the weight composition respectively and 10%) enter the common rectifying column 1 that the number of theoretical plates is 60, the feed position is the 35th theoretical plate, the reflux ratio is 1, the control tower top temperature is 40 ℃, and the side line is taken from the 40th theoretical plate The fraction 11 with a boiling range of 50-120°C exits, and the side stream fraction 11 enters a dividing column with a theoretical plate number of 200. The upper part of the dividing plate has a theoretical plate number of 40, and the lower part of the dividing plate has a theoretical plate number of 60. The left side of the upper part of the dividing plate The liquid phase distribution fraction is 0....

Embodiment 3

[0023] according to figure 1 As shown in the flow process, Fischer-Tropsch synthesis aqueous phase by-product 8 (components with a boiling point less than 40°C, components with a boiling range of 50 to 120°C and components with a boiling point greater than 120°C account for 5%, 85% of the weight composition respectively and 10%) enter the common rectifying column 1 that the number of theoretical plates is 30, the feeding position is the 17th theoretical plate, the reflux ratio is 3, the control tower top temperature is 40 ℃, and the side line is taken from the 20th theoretical plate The fraction 11 with a boiling range of 50-120°C exits, and the side stream fraction 11 enters a dividing column with a theoretical plate number of 120. The upper part of the dividing plate has a theoretical plate number of 20, and the lower part of the dividing plate has a theoretical plate number of 30. The upper left side of the dividing plate The liquid phase distribution fraction is 0.52, the ...

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Abstract

The invention relates to a method for separating a water phase side product of Fischer-Tropsch synthesis. The method mainly solves the problem that the water phase side product of the existing Fischer-Tropsch synthesis reaction is discharged directly, thereby being uneconomical and polluting the environment. The invention solves the problem well by the technical proposal which comprises the stepsas follows: the water phase side product enters into the middle part of an ordinary rectifying tower 1; a distillate stream I with the boiling range of 50 DEG C to 120 DEG C is extracted from a lateral line; a light component with the boiling point lower than 40 DEG C is obtained at the top of the tower; a heavy component with the boiling point higher than 120 DEG C is obtained at the bottom of the tower; distillate at the lateral line is carried out the rectifying separation through a separation tower 2, an extractive rectifying column 3, an azeotropic rectifying column 4, an acetic acid extracting tower 5, a solvent recycling tower 6 and an extracting agent recycling tower 7 to obtain acetone, methanol, ethanol, normal propyl alcohol and acetic acid basic organic raw material. The invention can be applied to the industrial production for disposing the water phase side product of the Fischer-Tropsch synthesis.

Description

technical field [0001] The invention relates to a method for separating the water-phase by-product of Fischer-Tropsch synthesis reaction. Background technique [0002] With the increase of demand for liquid fuels based on petroleum and the reduction of available reserves of petroleum resources, the method of producing usable liquid fuels from solid fuels such as coal has attracted more and more attention. There are two different technical routes for the liquefaction of solid fuels, one is direct liquefaction and the other is indirect liquefaction. Direct liquefaction is a process of directly converting solid fuels such as coal into liquefied oil under the action of solvents and catalysts under high temperature and pressure. The operating conditions of direct liquefaction are harsh and highly dependent on raw materials. Indirect liquefaction, commonly referred to as Fischer-Tropsch synthesis, is the synthesis gas containing carbon monoxide and hydrogen produced by solid fue...

Claims

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Application Information

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IPC IPC(8): C07C51/44C07C45/82C07C49/08C07C53/08C07C29/80C07C31/02
Inventor 钟禄平肖剑钟思青顾军民
Owner CHINA PETROLEUM & CHEM CORP
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