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Process for making dibutyl ethers from dry 1-butanol

Published online: Apr 27, 2009

Geographical region	Europe
Subject	Dibutyl ether production
Published date	Apr 8, 2009
Title	Process for making dibutyl ethers from dry 1-butanol
Patent Application Number	EP2043987 A2
Assignee	Du Pont, USA
Relevance	A process for producing dibutyl ether from fermentation broth by contacting dry 1-butanol with an acid catalyst.
Type of claims	Publication
Overview	This patent discloses a process for making dibutyl ether from fermentation broth by contacting dry 1-butanol with an acid catalyst such as homogeneous or heterogeneous catalyst. The dry 1-butanol is produced with greater efficiency by utilizing renewable feedstock such as corn stalks, corn cobs, etc., via fermentation using Clostridium sp. The dry 1-butanol is a used as a reactant to produce dibutyl ether which is used as additive in transportation fuels. The process comprises, A) obtaining a fermentation broth comprising 1-butanol, B) separating dry 1-butanol from the fermentation broth to form separated dry 1-butanol by distillation, C) contacting the separated dry 1-butanol of step (B), optionally in the presence of a solvent, with an acid catalyst at a temperature of about 50° to 450°C and a pressure from about 0.1 to 20.7 MPa to produce a reaction product comprising dibutyl ether and D) recovering dibutyl ether from the reaction product.
Related patent documents	US Patent publications US6358717 - Method of producing butanol using a mutant strain of Clostridium beijerinckii (2002) US5192673 - Mutant strain of C. acetobutylicum and process for making butanol (1993) US5753474 - Continuous two stage, dual path anaerobic fermentation of butanol and other organic solvents using two different strains of bacteria (1998) US5755967 - Silicalite membrane and method for the selective recovery and concentration of acetone and butanol from model ABE solutions and fermentation broth (1998) US20050089979 - Process for continuous solvent production (2005) US4450294 - Process for recovering oxygenated organic compounds from dilute aqueous solutions employing solid sorbent (1984) US4628116 - Vinyl bromide extraction of butyric acid and butanol from microbial fermentation broth (1986) Foreign patent publications Not Listed
Patent Document	Full Patent Document [external link]

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