Separating and recovering method for organic oxygen-containing compounds in Fischer-Tropsch synthesis water phase

Abstract

The invention relates to method and equipment system for separating and recovering organic oxygen-containing compounds in a Fischer-Tropsch synthesis water phase. The equipment system is integrated by adopting twelve towers including a mixed acid cutting tower, an acetaldehyde rectifying tower, a methanol / ethanol dividing tower, a methanol extraction rectifying tower, a methanol rectifying tower, an acetaldehyde removing tower, an ethanol tower, a propanol concentration extracting tower, a propanol intermittent azeotropic distillation tower, a carboxylic acid extraction tower, a carboxylic acid intermittent rectifying tower and an extraction agent recovering tower matched with the carboxylic acid extraction tower for use. By applying the method and equipment system disclosed by the invention, more than ten kinds of organic oxygen-containing compounds such as acetaldehyde, acetone, methanol, ethanol, normal propyl alcohol, normal butanol, acetic acid, metacetonic acid, butyric acid, butanone and the like can be separated from raw materials; and the products can respectively reach the industrial purity. The method and equipment provided by the invention are economic, effective and reasonable; and according to the method and equipment, efficiency of Fischer-Tropsch synthesis industrial enterprises can be greatly increased, production cost is reduced and goal of clean production can be achieved.

Description

technical field [0001] The invention relates to a separation process and recovery method of organic oxygen-containing compounds in the water phase by-products of Fischer-Tropsch synthesis. Background technique [0002] Convert carbon-containing resources such as coal, natural gas, biomass, organic waste, and sludge into synthesis gas (CO+H 2 ), and then convert it into liquid fuel through Fischer-Tropsch synthesis (Fischer-Tropsch synthesis, F-T synthesis) on iron-based catalyst or cobalt-based catalyst, which is to supplement the shortage of petroleum-based liquid fuel, alleviate the tight supply of oil products, and ensure economic stability. important means of sustainable development. The process of coal indirect liquefaction to synthetic oil is a complex integrated process system including multiple processes such as coal transportation, coal gasification, synthesis gas purification, Fischer-Tropsch synthesis, oil product processing, water and electricity supply, and was...

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Problems solved by technology

[0005] Chinese patent ZL03814122.1 introduces a process for treating Fischer-Tropsch synthesis reaction water containing organic oxygen-containing compounds, aliphatic hydrocarbons, aromatic hydrocarbons, cyclic hydrocarbons and inorganic substances to obtain purified water. The method includes ordinary distillation, Biological treatment, solid-liquid separation and other steps do not take into account the separation and purification of individual organic oxygen compounds

[0009] Based on the problem that the direct discharge of Fischer-Tropsch synthesis water-phase by-products is uneconomical and pollutes the environment, the inventor proposes a process and a separation technology for the separation of water-phase by-products. Oxygenated compounds are separated, and the purity of the separated products meets the requirements for industrial product sales

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