Process for the purification of an aqueous stream coming from the fischer-tropsch reaction
AssigneeENI S.p.A.
InventorsRoberta Miglio, Lino Carnelli, Gabriele Carlo Ettore Clerici, Roberto Zennaro
Life of this patent
Estimating the term…
Abstract
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.
Claims37
A process for purifying a first aqueous stream coming from a Fischer-Tropsch reaction, the process comprising:
- feeding the first aqueous stream to at least one pervaporation unit units, wherein the at least one pervaporation unit comprises at least one polymeric pervaporation membrane, to obtain two outgoing streams:
- (i) a second aqueous stream (i) enriched in at least one alcohol having from 1 to 8 carbon atoms;
- and
- (ii) a third aqueous stream (ii) enriched in water.
A process for purifying a first aqueous stream coming from a Fischer-Tropsch reaction, the process comprising:
- (l) feeding the first aqueous stream to at least one pervaporation unit, wherein the at least one pervaporation unit comprises at least one lipophilic polymeric pervaporation membrane, to obtain two outgoing streams:
- (ia) a second aqueous stream (ia) enriched in at least one alcohol having from 1 to 8 carbon atoms;
- and
- (iia) a third aqueous stream (iia) enriched in water;
- (II) feeding the second aqueous stream (ia) at least one pervaporation unit, wherein the at least one pervaporation unit comprises at least one hydrophilic polymeric pervaporation membrane, to obtain two outgoing streams:
- (ib) a fourth aqueous stream (ib) enriched in at least one alcohol having from 1 to 8 carbon atoms;
- (iib) a fifth aqueous stream (iib) enriched in water.
A process for purifying a first aqueous stream coming from a Fischer-Tropsch reaction, the process comprising:
- (I) feeding the first aqueous stream a distillation or stripping column, to obtain a distilled aqueous stream (ic);
- (II) feeding the distilled aqueous stream (ic) enriched in at least one alcohol leaving a head of the distillation or stripping column 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:
- (id) a second aqueous stream (id) enriched in at least one alcohol having from 1 to 8 carbon atoms;
- (iid) a third aqueous stream (iid) enriched in water.
Dependencies are inferred from the claim text.