Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1982-01-20
1983-11-22
Cooper, Jack
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423135, 423495, C01F 756
Patent
active
044168624
ABSTRACT:
The invention relates to a method for utilizing silicon tetrachloride formed as a by-product of the chlorination of aluminium- and silicon-containing minerals. More particularly, the invention relates to a process for the preparation of aluminium trichloride and silicon dioxide by chlorination of alumina with silicon tetrachloride. According to the invention alumina or a material essentially consisting of alumina is reacted with silicon tetrachloride as a single chlorinating agent at a temperature exceeding 400.degree. C., unreacted silicon tetrachloride is separated from the aluminium trichloride formed and is recycled into the chlorination step, silicon dioxide is isolated from the solid residue essentially consisting of the unreacted alumina and silicon dioxide, unreacted alumina is recycled into the chlorination step and aluminium trichlorine obtained is continuously eliminated.
REFERENCES:
patent: 4086320 (1978-04-01), Martin et al.
patent: 4096234 (1978-06-01), Martin et al.
patent: 4220629 (1980-09-01), Wyndham et al.
Gencev Dinko
Riederauer Szilard
Szabo nee Mogyorosi Katalin
Szepvolgyi Janos
Cooper Jack
Katona Gabriel P.
Tatabanyai Szenbanyak
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