Method for recovering alkanols from aqueous HBr-solutions
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United States of America Patent
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Nov 16, 1999
Grant Date -
N/A
app pub date -
Apr 3, 1998
filing date -
Apr 3, 1997
priority date (Note) -
Expired
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Abstract
The present invention provides processes for recovering alkanols from fluids comprising the alkanol and aqueous hydrobromic acid without forming excessive amounts of alkyl bromide. In certain aspects of the invention, there are provided distillation systems wherein a fluid comprising an alkanol and aqueous hydrobromic acid is introduced into a distillation column at a point between the bottom and the top of the column to thereby separate the alkanol and the hydrobromic acid without causing the production of a significant amount of alkyl bromide. A process for separating an alkanol from aqueous hydrobromic acid which comprises (a) refluxing aqueous HBr in a fractionating column (10) having a port (15) located between the top (19) and bottom (11) ends of the column and in fluid communication with the column; (b) feeding into the column through the port a first fluid comprising an alkanol and aqueous HBr; (c ) recovering from the top end of the column a second fluid comprising at least 50% of the alkanol; and (d) recovering at the bottom end of the column a third fluid comprising at least 50% of the aqueous HBr.
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