Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ivb metal
Patent
1978-03-06
1978-10-10
Hearn, Brian
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ivb metal
423 85, 423119, 423128, 423131, 423146, 423199, 423208, C01G 2306, C01F 706
Patent
active
041196988
ABSTRACT:
The red mud by-product of the Bayer process by which aluminum oxide is reed from bauxite as an aluminate, is digested with concentrated sulfuric acid or with sulfur trioxide gas to produce sulfates that can be leached out to the resulting mass with water. The solution is then heated at a pH of 1 to precipitate titanium oxide hydrate by hydrolysis. The remaining sulfates of the solution are then obtained in solid form by evaporation, or by precipitation with acetone, and the solid is then roasted to convert the aluminum and iron to the oxide. After leaching out the sodium sulfate with water, the aluminum and iron oxide are separated by the Bayer process, which works in this case even though x-ray diffusion patterns show that the aluminum oxide is mainly .alpha.Al.sub.2 O.sub.3.
REFERENCES:
patent: 2398425 (1946-04-01), Haff
patent: 2402668 (1946-06-01), Roller
patent: 2551944 (1951-05-01), Haff
patent: 2830892 (1958-04-01), Udy
patent: 3295924 (1967-01-01), Colombo
patent: 3311449 (1967-03-01), Atsakawa et al.
Nafissi Ahmad
Winkhaus Gunther
Zimmer Erich
Hearn Brian
Kernforschungsanlage Julich, Gesellschaft mit beschrankter Haftu
Vereinigte Aluminum-Werke Aktiengesellschaft
Woodward William R.
LandOfFree
Reclamation treatment of red mud does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reclamation treatment of red mud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reclamation treatment of red mud will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1767031