RT Journal Article
T1 Synthesis of lactic acid by alkaline hydrothermal conversion of glycerol at high glycerol concentration
A1 Ramírez-López, Camilo A.
A1 Ochoa-Gómez, José R.
A1 Fernández-Santos, María
A1 Gómez-Jiménez-Aberasturi, Olga
A1 Alonso-Vicario, Ainhoa
A1 Torrecilla-Soria, Jesús
AB The synthesis of lactic acid by alkaline hydrothermal conversion of glycerol at high glycerol concentrations under autogenous pressure is described. Temperature (250-290 °C), NaOH/glycerol molar ratio (1.1-1.75), glycerol concentration (2.5-3.5 M), and reaction time (30-250 min) have been the variables studied with temperature and NaOH/glycerol molar ratio having the major influence. An 84.5% lactic acid (as sodium lactate) yield is obtained at 280 °C and 90 min with a 2.5 M glycerol concentration and a 1.1 NaOH/glycerol molar ratio. The same yield is obtained starting from crude glycerol from biodiesel production as raw material. Sodium acrylate, oxalate and formate, and sodium carbonate have been identified as the main byproducts with carbonate being the major one. Several conversion routes based on the experimental results are proposed. A process for lactic acid separation based on electrodialysis is outlined.
SN 0888-5885
YR 2010
FD 2010-07-21
LK https://hdl.handle.net/11556/3842
UL https://hdl.handle.net/11556/3842
LA eng
NO Ramírez-López , C A , Ochoa-Gómez , J R , Fernández-Santos , M , Gómez-Jiménez-Aberasturi , O , Alonso-Vicario , A & Torrecilla-Soria , J 2010 , ' Synthesis of lactic acid by alkaline hydrothermal conversion of glycerol at high glycerol concentration ' , Industrial & Engineering Chemistry Research , vol. 49 , no. 14 , pp. 6270-6278 . https://doi.org/10.1021/ie1001586
DS TECNALIA Publications
RD 31 jul 2024