A one-step process for converting ethanol, derived from carbohydrates, to butadiene, using a mixed alumina/zinc oxide catalyst at approximately 400°C: 2CH3CH2OH → CH2=CH ΜΆ CH=CH2. (Check source for accuracy of chemical formula)
Comyns, Alan E. Dictionary, Encyclopedic Dictionary of Named Processes in Chemical Technology (3rd ed.), Alan E. Comyns (Ed.), Boca Raton, FL, CRC Press LLC, USA 2000, http://worldtracker.org/media/library/Science/Chem istry/Synthesis/Encyclopedic%20Dictionary%20of%20N amed%20Processes%20in%20Chemical%20Technology.pdf, (Named Chem Procss - Amer) {35}