Catalyst production for use in a process for fluorination of hydrocarbons
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United States of America Patent
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Apr 21, 1998
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N/A
app pub date -
Mar 17, 1995
filing date -
Sep 17, 1992
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Abstract
A process for the removal of fluoride from a spent chromium-based fluroination catalyst by contacting the catalyst with potassium hydroxide to produce a suspension of solid hydrated chromium oxide in aqueous potassium fluoride. The solid hydrated chromium oxide may be separated from the solution, washed with water and/or aqueous acid, and contacted with nitric acid to produce a chromium (HI) nitrate solution from which a chromium-based catalyst may be prepared by precipitation of hydrated chromium oxide therefrom with aqueous alkali, and washing, drying and calcining the hydrated chromium oxide.
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