Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1995-04-13
1997-01-28
Bos, Steven
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423633, 423634, 423DIG1, C01G 4902
Patent
active
055975470
ABSTRACT:
A process for reducing the residual chloride present in iron oxides, particularly in regenerated iron oxides produced from hydrochloric acid waste liquid generated from steel pickling, by post-synthesis treatment of the iron oxides with yellow iron oxide, and subsequently heating the mixture at a temperature sufficient to release at least a part of the crystalline water contained in the yellow iron oxide to facilitate the removal of residual chloride present in iron oxides. The purified regenerated iron oxides are particular suitable for making high-grade ferrites.
REFERENCES:
patent: 1967235 (1934-07-01), Ferkel
patent: 3928529 (1975-12-01), Grulke
patent: 4092401 (1978-05-01), Dreulle
patent: 4107267 (1978-08-01), Hansen
patent: 4201762 (1980-05-01), Daly
patent: 5401485 (1995-03-01), Hamilton, Jr.
Patent Abstracts of Japan--vol. 004, No. 002 (C-069, 9 Jan. 1980 & JP-A-54/138,893 (Mitsui Eng. & Shipbuild Co. Ltd.) 27 Oct. 1979.
Search Report, PCT 17 Jul. 1996, PCT/EP96/01584.
K. Suganuma et al, "Removal of Chloride Ions from Hematite Powders for Ferrite Production", 4th International Conf. on Ferrites, Part I, F. Wang, editor, Advances in Ceramics, vol. 15, pp. 81-85 (1986), no month.
Bos Steven
Shell Oil Company
Tsang Y. Grace
LandOfFree
Reduction of residual chloride in iron oxides does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reduction of residual chloride in iron oxides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of residual chloride in iron oxides will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-940014