Method for producing C4 oxygentates by fermentation using high oxidation state sulfur
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United States of America Patent
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Sep 12, 2017
Grant Date -
Aug 7, 2014
app pub date -
Apr 4, 2014
filing date -
Jul 11, 2012
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Abstract
The invention relates to improvements in the production of butanol and butyrate by microbial fermentation, particularly to production of alcohols by microbial fermentation of a substrate comprising CO and the addition of an inorganic sulfur additive. It more particularly relates to the provision of an inorganic organic sulfur source to a fermentation system such that one or more micro-organisms convert a substrate comprising CO to butanol. In one aspect the invention uses a sulfur additive comprising inorganic sulfur compounds having a +2 to a +4 sulfur oxidation state that produces sulfur oxoanions and hydrosulfur oxoanions in an aqueous fermentation medium.
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