D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
D21C 11/00 (2006.01) B01D 61/42 (2006.01) B01D 61/44 (2006.01) C02F 1/469 (2006.01) D21C 11/10 (2006.01)
Patent
CA 2135726
A process for treating a low-concentrated aqueous feed solution comprising at least one aqueous process stream from a pulp mill, which comprises concentrating the feed solution by evaporation to form an evaporation concentrate, and subjecting at least a part of said concentrate to a first electrodialysis treatment, for forming a first electrodialysis concentrate containing salt removed from the evaporation concentrate and at least one diluate depleted in said salt. A plant for carrying out the above process which comprises an evaporator device (1) with an outlet connected to the inlet of an electrodialysis concentrating device (15), and optionally arranged in the liquid flow path therebetween a precipitating device (5) and/or a separating device (9).
Eka Nobel Ab
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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