Method for increasing the chrome to iron ratio of chromites...

Details Method for increasing the chrome to iron ratio of chromites... Method for increasing the chrome to iron ratio of chromites...

2004-02-06

2010-02-09

Langel, Wayne (Department: 1793)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group vib metal

C423S149000

Reexamination Certificate

active

07658894

ABSTRACT:
A method for increasing the chrome to iron ratio of a chromite product selected from the group consisting of ore and ore concentrate comprising the steps of mixing the chromite product with at least one salt so as to produce a mixture, whereby the concentration of salt in the mixture is selected to induce the selective chlorination of iron; and chlorinating the mixture in the presence of CO at a temperature sufficient to induce the formation of a thin film of a melt around the chromite product and at a temperature able to promote the selective chlorination of iron, whereby an iron impoverished chromite product is yielded having an increased chromite to iron ratio as compared to that of the chromite product.

REFERENCES:
patent: 2752301 (1956-06-01), Cooper
patent: 4047934 (1977-09-01), Pollard et al.
patent: 0 096 241 (1983-12-01), None
patent: 1567841 (1980-05-01), None
patent: 97/46724 (1997-12-01), None
patent: 96/4584 (1997-02-01), None
Bezukladnikov et al., Zr. Prikl. Khim., 1974, pp. 1770-1773, vol. 47.
Cook et al., J. Phys. Chem., 1961, pp. 1505-1511, 65.
Johnstone et al., J. Am. Chem. Soc., 1942, pp. 241-244, 64.
Kanari et al., Metallurgical and Materials Transactions B, Aug. 1999, pp. 577-587, 30B.
Kanari et al., Metallurgical and Materials Transactions B, Aug. 1998, pp. 729-737, 29B.
Rhee et al. Metallurgical Transactions B, Apr. 1990, pp. 321-330.
Zhao et al. Metallurgical Transactions B, Feb. 1990, pp. 131-133, 21B.

Affiliated with

Also associated with

Rating

Method for increasing the chrome to iron ratio of chromites... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for increasing the chrome to iron ratio of chromites..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for increasing the chrome to iron ratio of chromites... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4205966