Separating method of aqueous phase byproduct from Fischer-Tropsch synthesis

A technology for Fischer-Tropsch synthesis and by-products, applied in the separation/purification of carboxylic acid compounds, separation/purification of hydroxyl compounds, separation/purification of carbonyl compounds, etc., can solve the problem of direct discharge of by-products in the Fischer-Tropsch synthesis reaction economic and environmental issues

Active Publication Date: 2009-10-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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...

Method used

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  • Separating method of aqueous phase byproduct from Fischer-Tropsch synthesis
  • Separating method of aqueous phase byproduct from Fischer-Tropsch synthesis
  • Separating method of aqueous phase byproduct from Fischer-Tropsch synthesis

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Embodiment 1

[0015] according to figure 1 As shown in the flow process, the Fischer-Tropsch synthesis aqueous phase by-product 6 (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 8 with a boiling range of 50-120°C exits, and the side stream fraction 8 enters the separation column 2 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 liquid phase distribution fraction on the side is 0.7, the gas phase distribution fraction ...

Embodiment 2

[0019] according to figure 1 As shown in the flow process, the Fischer-Tropsch synthesis aqueous phase by-product 6 (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 distillate 8 with a boiling range of 50-120°C exits, and the side draw 8 enters the separation column 2 with a theoretical plate number of 200. The theoretical plate number on the upper part of the dividing plate is 40, and the number of theoretical plates on the lower part is also 60. The upper part of the dividing plate is left The liquid phase distribution fraction on the side is 0.31, the ...

Embodiment 3

[0023] according to figure 1As shown in the flow process, the Fischer-Tropsch synthesis aqueous phase by-product 6 (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 8 with a boiling range of 50-120°C is discharged, and the side stream fraction 8 enters the separation column 2 with a theoretical plate number of 120. The theoretical plate number on the upper part of the dividing plate is 20, and the number of theoretical plates on the lower part is also 30. The liquid phase distribution fraction on the side is 0.52, the gas phase distribution fra...

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Abstract

The invention relates to a separating method of an aqueous phase byproduct from Fischer-Tropsch synthesis and mainly aims at solving the problem that the direct discharge of the aqueous phase byproduct of Fischer-Tropsch synthesis at present is not economical and pollutes the environment. The method adopts the following steps: the aqueous phase byproduct enters the middle part of a common rectifying tower 1, a distillate stream I with the boiling range of 50-120 DEG C is extracted at a lateral line, a light component with a boiling range of less than 40 DEG C is obtained at the top of the tower, and a heavy component with the boiling range of more than 120 DEG C is obtained at a kettle of the tower; and the lateral line distillate is rectified and separated by an isolating tower 2, a co-boiling rectifying tower 3, an acetic acid extraction tower 4 and an extractant recovering tower 5 so as to obtain methanol-acetone solution, ethanol, n-propanol and a basic organic raw material of acetic acid, and such a technical scheme better solves the problem and can be used in the industrial production for treating the aqueous phase byproduct from the Fischer-Tropsch synthesis.

Description

technical field [0001] The invention relates to a method for separating by-products of Fischer-Tropsch synthesis reaction water phase. 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 fuels ...

Claims

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Application Information

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IPC IPC(8): C07C29/74C07C45/78C07C51/42C07C53/08C07C31/02
Inventor 钟禄平肖剑张惠明
Owner CHINA PETROLEUM & CHEM CORP
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