title: Production of biobutanediols by the hydrogenolysis of erythritol.
abstract: The hydrogenolysis of erythritol using an Ir-ReO(x)/SiO(2) catalyst was performed for the production of butanediols, which are widely used as a raw material of polymers. The activity and selectivity to butanediols on Ir-ReO(x)/SiO(2) was much higher than that on conventional hydrogenolysis catalysts. The maximum selectivity to 1,4- and 1,3-butanediols reached 33 and 12 % at 74 % conversion, respectively. The erythritol conversion and selectivity to butanediols was almost maintained during four repeating tests if small amounts of acid were added to the reaction and the catalyst was calcined again. The reaction kinetics, reactivity trends, and characterization results indicate a direct hydrogenolysis mechanism in which the hydride species on the Ir metal surface attacks the alkoxide species on the 3D ReO(x) clusters. Based on the production of erythritol by the fermentation of glucose and glycerol, erythritol hydrogenolysis may be a promising pathway for the production of biobutanediols.
authors.affiliation: Department of Applied Chemistry, School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Sendai 980-8579, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Amada
authors.forename: Hideo
authors.initials: H
authors.lastname: Watanabe
authors.forename: Yuichirou
authors.initials: Y
authors.lastname: Hirai
authors.forename: Yasuteru
authors.initials: Y
authors.lastname: Kajikawa
authors.forename: Yoshinao
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: Keiichi
authors.initials: K
authors.lastname: Tomishige
mesh_terms: D002072:Butylene Glycols / Q000737:chemistry*; D002384:Catalysis; D004896:Erythritol / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D007495:Iridium / Q000737:chemistry; D007700:Kinetics; D012211:Rhenium / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry
chemical_list: D002072:Butylene Glycols; C015428:perrhenate; D007495:Iridium; D012211:Rhenium; D012822:Silicon Dioxide; D006859:Hydrogen; D004896:Erythritol