Process for the purification of an aqueous stream coming from the fischer-tropsch reaction

摘要

Process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction which comprises: feeding said aqueous stream containing the organic by products of the reaction to one or more pervaporation units, said one or more pervaporation units comprising at least one polymeric pervaporation membrane, obtaining two outgoing streams: —an aqueous stream (i) enriched in alcohols having from 1 to 8 carbon atoms, preferably from 2 to 4 carbon atoms; —an aqueous stream (ii) enriched in water.

主权项

1. A process for purifying a first aqueous stream coming from a Fischer-Tropsch reaction, the first aqueous stream comprising an aldehyde, a ketone, an acid, a nitrogenated compound, a sulfurated compound, and traces of metals, the process comprising:
feeding the first aqueous stream to at least one pervaporation unit, wherein the at least one pervaporation unit comprises at least one polymeric pervaporation membrane, to obtain two outgoing streams: (i) a second aqueous stream enriched in at least one alcohol having from 1 to 8 carbon atoms, with respect to said first aqueous stream; and (ii) a third aqueous stream enriched in water, wherein said first aqueous stream is fed to said at least one pervaporation unit without any intervening distillation.