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

1993-03-15

1995-06-06

Bos, Steven

Chemistry of inorganic compounds

Halogen or compound thereof

Binary compound containing metal

159DIG16, C01G 4900

Patent

active

054220912

ABSTRACT:
Concentrated aqueous solutions of ferric chloride, directly useful as flocculating agents in a variety of water treatments, are prepared by (a) digesting iron with a dilute aqueous solution of hydrochloric acid until such acid has essentially been consumed and thereby producing an aqueous solution of ferrous chloride; (b) reacting chlorine with such aqueous solution of ferrous chloride, in the presence of a recycled aqueous solution of ferric chloride; (c) decompressing the step (b) reaction product solution to vaporize water therefrom, thereby concentrating same; and (d) recycling a fraction of the decompressed liquid phase to step (b) 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
Chemical Abstracts, vol. 89, No. 12, Sep. 19, 1978, p. 104, No. 91817y.
Chemical Abstracts, vol. 100, No. 6, Feb. 1984, p. 114, No. 36486k.
Chemical Abstracts, vol. 107, No. 26, Dec. 1987, p. 148, No. 239316x.
Chemical Abstracts, vol. 82, No. 20, May 1975, p. 114, No. 127078e.
Perry Chemical Engineer's Handbook, 3d Ed., p. 510 (1950).
Translation of JP 49-113798, (1974).

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