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The process may be likened to how yeast ferments sugars to produce ethanol for wine, beer, or fuel, but the organisms that carry out the ABE fermentation are strictly anaerobic (obligate anaerobes). The ABE fermentation produces solvents in a ratio of 3 parts acetone, 6 parts butanol to 1 part ethanol.
Acetone, butanol, and ethanol are the most common products of solventogenesis. Some species such as Clostridium beijerinckii, Clostridium puniceum and Clostridium roseum are able to further reduce acetone to isopropanol. Several species are able to produce additional solvents under various culture conditions.
A senior lecturer at the University of Manchester, England, he used them in 1916 as a bio-chemical tool to produce at the same time, jointly, acetone, ethanol, and n-butanol from starch. The method has been described since as the ABE process , (Acetone Butanol Ethanol fermentation process), yielding 3 parts of acetone , 6 of n -butanol, and 1 ...
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In ethanol fermentation, one glucose molecule is converted into two ethanol molecules and two carbon dioxide (CO 2) molecules. [11] [12] It is used to make bread dough rise: the carbon dioxide forms bubbles, expanding the dough into a foam. [13] [14] The ethanol is the intoxicating agent in alcoholic beverages such as wine, beer and liquor. [15]
2-methyl-1-butanol - sometimes called "active" amyl alcohol; isobutyl alcohol - one of the least toxic of the butanols. 1-propanol; Other higher alcohols that can be produced during fermentation include: isopropanol (isopropyl alcohol), oxidized to form acetone by alcohol dehydrogenase in the liver, leading to ketosis when ingested in large ...
Catalysts such as Raney Nickel are required to facilitate the hydrogen transfer steps. [1] While the Guerbet reaction is traditionally (and commercially) focused on fatty alcohols, it has been investigated for the dimerization of ethanol to butanol. [3] Organometallic catalysts have been investigated. [4]
He developed the acetone–butanol–ethanol fermentation process, which produces acetone, n-butanol and ethanol through bacterial fermentation. His acetone production method was of great importance in the manufacture of cordite explosive propellants for the British war industry during World War I .