Process for the purification of an aqueous stream coming...

Details Process for the purification of an aqueous stream coming... Process for the purification of an aqueous stream coming...

2011-08-02

2011-08-02

Parsa, Jafar (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C518S728000, C210S175000, C210S180000

Reexamination Certificate

active

07989510

ABSTRACT:
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; —condensation of the vaporized stream leaving the head of the column and the removal of a distillate enriched in the heaviest by-products; —feeding the partially purified aqueous stream leaving the bottom of the distillation column, at the head to one or more sensible contact exchangers; —sending a process gas in countercurrent to the tail of the exchanger at a temperature lower than that of the aqueous stream; —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; —sending the purified colder water leaving the exchanger directly to further treatment.

REFERENCES:
patent: 6462097 (2002-10-01), Martino et al.
patent: 6887908 (2005-05-01), Pruet
patent: 2003/0125396 (2003-07-01), Espinoza et al.
patent: 2005/0131085 (2005-06-01), Kohler et al.
patent: 647 903 (1950-12-01), None
patent: 03 048272 (2003-06-01), None

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