Process for recycling alkali metal fluorides and/or difluorides
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United States of America Patent
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Oct 1, 2002
Grant Date -
N/A
app pub date -
Apr 10, 2000
filing date -
Apr 19, 1999
priority date (Note) -
Expired
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Abstract
The invention relates to a process for recovering alkali metal fluorides and/or difluorides from waste mixtures containing alkali metal chlorides and/or alkali metal fluorides and/or difluorides and, optionally, organic compounds, by (a) subjecting a waste mixture comprising one or more alkali metal chlorides and/or one or more alkali metal fluorides and/or difluorides and, optionally, one or more organic compounds, to a thermal/oxidative pre-treatment and/or an extractive pre-treatment, and (b) bringing the pre-treated mixture into contact with hydrogen fluoride.
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