Liquid ferric sulfate manufacturing process

Details Liquid ferric sulfate manufacturing process Liquid ferric sulfate manufacturing process

2006-06-27

2006-06-27

Silverman, Stanley S. (Department: 1754)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C423S146000, C423SDIG022

Reexamination Certificate

active

07067100

ABSTRACT:
A process for the production of liquid ferric sulfate from finely-divided ferric oxide, sulfuric acid and water in a closed reaction vessel at temperatures ranging from about 130.degree. C. to about 150.degree. C. and pressures from about 30 psi to about 70 psi. The reaction time ranges from Four to eight hours and produces liquid ferric sulfate having at least 10% trivalent iron. Yield and efficiency are provided by controlling the specific gravity prior to the reaction and by counter current cycling the waste stream from the reaction through the dilution water and use of a polymeric settling agent to remove unreacted iron content from the digester output.

REFERENCES:
patent: 2252332 (1941-08-01), Plumer
patent: 3503946 (1970-03-01), Scanley et al.
patent: 3719748 (1973-03-01), Manfroy et al.
patent: 4814158 (1989-03-01), Everill
patent: 61-215222 (1986-09-01), None
Perry's Chemical Engineers' Handbook, Seventh Edition (1997), McGraw-Hill, ISBN 0-07-049841-5: Section 18, “Liquid-Solid Operations and Equipment”: Table of Contents at pp. 18-1-18-4, and pp. 18-74-18-77 of section entitled “Filtration”.

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