| 摘要 |
Disclosed is a method for recovering butanol from a fermentation medium, the method comprising: a) providing a fermentation medium comprising butanol, water, and a genetically modified microorganism that produces butanol from a fermentation medium comprising at least one fermentable carbon source; b) passing a gas through the fermentation medium to form a butanol-containing gas phase; c) contacting the fermentation medium with (i) at least one first water immiscible organic extractant selected from the group consisting of C12 to C22 fatty alcohols, C12 to C22 fatty acids, esters of C12 to C22 fatty acids, C12 to C22 fatty aldehydes, and mixtures thereof, and optionally (ii) a second water immiscible organic extractant selected from the group consisting of C12 to C22 fatty alcohols, C12 to C22 fatty acids, esters of C12 to C22 fatty acids, C12 to C22 fatty aldehydes, and mixtures thereof to form a two-phase mixture comprising an aqueous phase and a butanol containing organic phase; d) separating the butanol-containing organic phase from the aqueous phase; and e) recovering the butanol from the butanol-containing organic phase and the butanol-containing gas phase to produce recovered butanol.
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