A method for dehydration recovery of non-acid oxygen-containing organic matter in Fischer-Tropsch synthesis water

Abstract

The invention discloses a dehydration recovery method of non-acid oxygen-containing organic substances in Fischer-Tropsch synthesis water. The method comprises the following steps: carrying out extractive distillation on non-acid oxygen-containing organic substances to obtain a light mixed alcohol product at the tower top and obtain a water solution containing heavy mixed alcohols and extractant at the tower bottom, wherein the non-acid oxygen-containing organic substances are oxygen-containing organic substances obtained by deacidifying and rectifying Fischer-Tropsch synthesis water; (2) rectifying the water solution containing heavy mixed alcohols and extractant to obtain a water solution containing heavy mixed alcohols at the tower top and obtain reclaimed extractant at the tower bottom; and (3) carrying out non-homogeneous phase stratification on the water solution containing heavy mixed alcohols to obtain an organic phase solution on the upper layer and obtain a water phase solution on the lower layer; and (4) rectifying the organic phase solution to obtain the heavy mixed alcohol product at the tower bottom. The mixed alcohol product is obtained through a plurality of rectifying operating units; and the product has the advantages of high purity and higher heat value, can be used as a fuel, and can also be subjected to deep processing to obtain different oxygen-containing compounds, thereby greatly increasing the product varieties of the solid fuel liquefying oil producer.

Description

technical field [0001] The invention relates to a method for dehydrating and recovering non-acid oxygen-containing organic matter in Fischer-Tropsch synthesis water. Background technique [0002] Fischer-Tropsch synthesis is the conversion of synthesis gas (carbon monoxide and hydrogen) derived from natural gas, coal, etc., into normal hydrocarbons (alkanes and α-olefins) with chain lengths from C1 to C100 or more, a small amount of isomeric hydrocarbons and low carbon number containing The reaction process of oxygen organic compounds (acids, alcohols, aldehydes, ketones and esters) and water, and this reaction process is accompanied by a strong exotherm. [0003] The detailed stoichiometric relationship of the Fischer-Tropsch synthesis reaction can be expressed as: [0004] Alkanes nCO+(2n+1)H 2 =C n h 2n+2 +nH 2 O (1-1) [0005] Alkenes nCO+2nH 2 =C n h 2n +nH 2 O (1-2) [0006] Acid nCO+(2n-2)H 2 =C n h 2n o 2 +(n-2)H 2 O (1-3) [0007] Alcohol nCO+2nH 2...

AI Technical Summary

Problems solved by technology

The unit processes involved in the patent include: ordinary distillation, azeotropic distillation, extractive distillation, batch distillation, stripping, extraction, dry distillation, hydrogenation reaction, etc., both separation process and reaction process, process flow complex

Since there are many types of oxygen-containing organic substances in the actual Fischer-Tropsch synthesis water phase, their content will inevitably fluctuate during the production process, and the processes introduced in these patents have high stability of raw material composition and process integration. requirements, so it is difficult to achieve industrial scale-up

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