Process for the preparation of acicular .alpha.-iron oxide hydra

Details Process for the preparation of acicular .alpha.-iron oxide hydra Process for the preparation of acicular .alpha.-iron oxide hydra

1992-09-15

1996-04-16

Bell, Mark L.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423634, 252 6258, 252 6259, C01G 4906, C04B 3526

Patent

active

055080170

ABSTRACT:
A process for the preparation of acicular .alpha.-iron oxide hydrate which comprises oxidizing a slurry of ferrous hydroxide having an excessive alkali concentration of 1.0 mol/l or above with an oxygen-containing gas, interrupting oxidation, adding an excessive quantity of an aqueous solution of a salt of aluminate, homogenizing and stirring the resulting mixture, again oxidizing it with an oxygen-containing gas to obtain a slurry containing free aluminate ion and .alpha.-iron oxide hydrate, homogenizing and stirring the slurry, then neutralizing and aging it, and washing and drying it.

REFERENCES:
patent: 4323464 (1982-04-01), Umeki
patent: 5076836 (1991-12-01), Hisaoka et al.
patent: 5185093 (1993-02-01), Ichikawa et al.
Database WPI Derwent Publications Ltd., London, GB; AN 77-91198Y & JP-A-52 134 858 (Kanto Denka Kogyo) * abstract * Feb. 1989.

Affiliated with

Also associated with

Rating

Process for the preparation of acicular .alpha.-iron oxide hydra does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of acicular .alpha.-iron oxide hydra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of acicular .alpha.-iron oxide hydra will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-323555