METHOD FOR EXTRACTING ALCOHOLS FROM AN INITIAL MIXTURE COMPRISING ALCOHOLS IN AQUEOUS PHASE
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United States of America Patent
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Issued Date -
May 30, 2024
app pub date -
Mar 9, 2022
filing date -
Mar 22, 2021
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Abstract
The invention relates to a process for extracting alcohols from an initial mixture (1) comprising alcohols in aqueous phase, with:
- a distillative separation by an isopropanol-butanol distillation column (III) equipped at the top with a condenser (c3), intended for separating said mixture into a water-isopropanol azeotrope stream (6) at the top and into a water-butanol azeotrope stream (7) at the bottom,a distillative separation intended for separating the water-butanol azeotrope stream into water and butanol, by a hetero-azeotropic distillation system comprising at least one water-recovering water column (IV) and at least one butanol (9)-recovering butanol column (V) equipped with a reboiler (r5),such that a heat transfer is performed from the top water-isopropanol azeotrope stream (6) entering the condenser of the isopropanol-butanol distillation column (III), to the stream entering the reboiler of the butanol column (V).
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