Franca Pisani, Legal Representative

Lino Locatelli

Gabriele Carlo Clerici

The present invention relates to a process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction which comprises: feeding the aqueous stream containing organic by products of the reaction to a fractionating distillation column or to a stripping column; &#x2014;condensation of the vaporized stream leaving the head of the column and the removal of a distillate enriched in the heaviest by-products; &#x2014;feeding the partially purified aqueous stream leaving the bottom of the distillation column, at the head to one or more sensible contact exchangers; &#x2014;sending a process gas in countercurrent to the tail of the exchanger at a temperature lower than that of the aqueous stream; &#x2014;sending the process gas enriched in water and part of the residual organic product leaving the head of the exchanger to the Fischer-Tropsch synthesis plant of hydrocarbons; &#x2014;sending the purified colder water leaving the exchanger directly to further treatment.

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Vigevano, Italy

Franca Pisani, Legal Representative