METHOD OF SODIUM SULFATE ISOLATION FROM SCRUBBING SOLUTION OF ELECTROLYTICAL ALUMINIUM PRODUCTION Russian patent published in 1996 - IPC

Abstract RU 2064891 C1

FIELD: chemical technology, aluminium production. SUBSTANCE: sodium sulfate crystallization is carried out at cooling saturated solution in cascade arranged crystallizers at temperature 7 (-5) C. Temperature of each preceding crystallizer is maintained at level distinct from that in the next crystallizer by 4-6 C. Invention can be used for fluorine regeneration containing in exhaust gases from aluminium electolyzers. EFFECT: improved method of isolation. 1 tbl

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RU 2 064 891 C1

Authors

Moiseev V.N.

Koshik I.M.

Gavrilenko L.V.

Fefelov Ju.N.

Dates

1996-08-10—Published

1994-08-08—Filed