Bayer process for production of alumina trihydrate, the said improvement relating to separation of aluminate liquor and insoluble residues
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United States of America Patent
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Oct 5, 2010
Grant Date -
Oct 18, 2007
app pub date -
Sep 19, 2005
filing date -
Sep 21, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
′) containing the said liquor and the said residues and that supplies or is derived from the said liquid-solid separation device. In a first embodiment, at least one hydrocyclone is used at the upstream side of the settler-thickener, as clarifier of the pregnant liquor. In a second embodiment, at least one hydrocyclone is used as a thickener of insoluble residue mud. In a third embodiment, a hydrocyclone is used in combination with the causticisation settler.
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