Production of concentrated aqueous solutions of ferric chloride

Details Production of concentrated aqueous solutions of ferric chloride Production of concentrated aqueous solutions of ferric chloride

1995-06-05

1996-06-18

Bhat, N.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including external recycle loop

422256, 422260, 422280, 422281, 423493, 159DIG16, 202205, B01J 800

Patent

active

055275150

ABSTRACT:
35% to 45% by weight concentrated aqueous solutions of ferric chloride, directly useful as flocculating agents in a variety of water treatments, are prepared by (a) reacting chlorine with an aqueous solution of ferrous chloride, in the presence of a recycled aqueous solution of ferric chloride; (b) decompressing the step (a) reaction product solution to vaporize water therefrom, thereby concentrating same; and (c) recycling a fraction of the decompressed liquid phase to step (a) and recovering remaining fraction as final product aqueous solution of ferric chloride.

REFERENCES:
patent: 1054400 (1913-02-01), Dow et al.
patent: 1969793 (1934-08-01), Hechenbleikner
patent: 2096855 (1937-10-01), Ladd
patent: 3979470 (1976-09-01), Firnhaber et al.
patent: 5118489 (1992-06-01), Clair et al.
patent: 5219531 (1993-06-01), Clair et al.
patent: 5422091 (1995-06-01), Clair et al.
Nagatoshi et al., Concentrated Solution of Ferric Chloride, Chemical Abstracts, vol. 82, No. 20, 1975, p. 114, Abstract No. 127078e.
John H. Perry, Chemical Engineers' Handbook, 3rd Edition, p. 510 (1950).
Translation of JP 49-113,798 (1974).

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