Method for separating and reclaiming organic matter from high-temperature Fischer-Tropsch synthesis reaction water

Abstract

The invention relates to a separation and recovery method of organic matters in high-temperature Fischer-Tropsch synthesis reaction water. The method comprises steps of: (1) separating and recoverying aldehyde after rectifying and removing organic acid; (2) rectifying and separating ketone / n-propanol; (3) rectifying and separating acetone / butanone; (4) refining acetone; (5) extracting and separating butanone / ethanol; (6) rectifying and separating ethanol / n-propanol; further rectifying alcohol-containing aqueous sollution obatained from the bottom of a column for rectifying and separating ketone / n-propanol, ethanol containing little water and obtained from the top of the column, and n-propanol alcohol-containing aqueous sollution obatained from the bottom of the column; (7) azeotropic rectifying ethanol sollution obtained by exaction and separation, and ethanol sollution with n-propanol separated to prepare anhydrous ethanol; (8) adding calces in n-propanol aqueous sollution, distilling to obtain n-propanol products; the invention effectively and orderly separates and recoveries aldehyde, acetone, butanone, ethanol and n-propanol, the purity of each product is above 95% and the yield is above 90%.

Description

technical field

[0001] The invention relates to a separation method, in particular to a method for separation and recovery of organic matter in high-temperature Fischer-Tropsch synthesis reaction water. Specifically, the content of acetaldehyde in the high-temperature Fischer-Tropsch synthesis reaction water is 0.19%-0.52%, the content of acetone is 0.67%-1.38%, the content of butanone is 0.65%-1.33%, the content of ethanol is 2.22%-4.96%, and the content of propanol is 0.45%- When the concentration is 0.99%, a series of rectification methods are used to separate and recover acetaldehyde, ethanol, n-propanol, acetone, butanone products with high recovery rate and purity. Background technique

[0002] The development of coal liquefaction has become a long-term strategic measure for my country to solve the contradiction between oil supply and demand. The Fischer-Tropsch synthesis reaction is the core reaction of coal indirect liquefaction. The temperature of the high-temperat...

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