Compositions: ceramic – Ceramic compositions – Clay containing
Patent
1987-06-10
1989-03-07
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Clay containing
501145, 423 82, 423119, C04B 3304
Patent
active
048106828
ABSTRACT:
A process for production of useful materials including a product of similar composition to nepheline involves contacting a slurry of red mud with sulphur dioxide to dissolve components of the red mud that are soluble in sulphurous acid, removing residual undissolved solids by filtration, and recovering a filtrate containing soda, alumina and silica values, removing free water from the filtrate to produce a crystallized residue, and calcining the crystallized residue.
REFERENCES:
patent: 3311449 (1967-03-01), Atsukawa
patent: 4017425 (1977-04-01), Shiao
patent: 4668485 (1987-05-01), Cresswell
Chemical Abstracts, vol. 73 (Nov. 16, 1979), 106-107, No. 100566q (Japanese Patent Appln. JP-A-7025762 Yo Kosh), "Recovery of Useful Materials from Red Muds in Alumina Manufacturing Process".
Chemical Abstracts, vol. 80 (Mar. 11, 1974), 113 No. 49861x (Japanese Patent Appln. 7375497 Sumitomo Chemical Co. Ltd.), "Readily Soluble Aluminium Hydroxide".
Chemical Abstracts, vol. 82 (Mar. 24, 1975), 124 No. 75093j (Japanese Patent Appln. 7425118 Sumitomo Chemical Co. Ltd.), "Recovering Valuable Components of Red Mud".
Comalco Aluminum Limited
Dixon Jr. William R.
Hunter, Jr. James M.
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