Distillation: processes – separatory – Plural distillations performed on same material – One a distillation under positive pressure or vacuum
Patent
1981-01-12
1982-09-14
Sever, Frank
Distillation: processes, separatory
Plural distillations performed on same material
One a distillation under positive pressure or vacuum
55 71, 55 72, 203 77, 203 78, 203 80, 203 82, 203 84, 423135, 423210, 423463, 423496, B01D 314
Patent
active
043494200
ABSTRACT:
Metal chlorides such as aluminum chloride (AlCl.sub.3) are separated from a mixture containing metal chlorides including AlCl.sub.3 and ferric chloride (FeCl.sub.3). In order to effect this separation, the mixture is subjected to a fractional distillation process utilizing an array of distillation columns. According to this process, the mixture is introduced into a first distillation column which is operated at temperatures and pressures sufficient to separate FeCl.sub.3 from the mixture while avoiding the formation of a solid solution of FeCl.sub.3 and AlCl.sub.3 within the column. At least one additional distillation column is then employed to separate metal chlorides from the remaining mixture from the first column.
REFERENCES:
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patent: 2813786 (1957-11-01), Milliken
patent: 2870869 (1959-01-01), Mahler
patent: 3436211 (1969-04-01), Dewing
patent: 3786135 (1974-01-01), King et al.
patent: 3938969 (1976-02-01), Sebenik et al.
patent: 4083923 (1978-04-01), Lippman et al.
Aluminum Company of America
Hill David J.
Sever Frank
Sullivan Jr. Daniel A.
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