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Catalytic Conversion of Dihydroxyacetone to Lactic Acid Using Metal Salts in Water
Author(s) -
Rasrendra Carolus B.,
Fachri Boy A.,
Makertihartha I. Gusti B. N.,
Adisasmito Sanggono,
Heeres Hero J.
Publication year - 2011
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201000457
Subject(s) - dihydroxyacetone , catalysis , yield (engineering) , lactic acid , chemistry , glyceraldehyde , metal , homogeneous catalysis , homogeneous , reaction mechanism , inorganic chemistry , organic chemistry , materials science , enzyme , thermodynamics , metallurgy , physics , biology , bacteria , glycerol , dehydrogenase , genetics
We herein present a study on the application of homogeneous catalysts in the form of metal salts on the conversion of trioses, such as dihydroxyacetone (DHA), and glyceraldehyde (GLY) to lactic acid (LA) in water. A wide range of metal salts (26 in total) were examined. Al III salts were identified as the most promising and essentially quantitative LA yields (>90 mol %) were obtained at 140 °C and a reaction time of 90 min. A reaction pathway is proposed and a kinetic model using the power law approach was developed for the conversion of DHA to LA with pyruvaldehyde (PRV) as the intermediate. Good agreement between experimental data and the model was obtained. Model predictions, supported by experiments, indicate that a high yield of LA is favoured in dilute solutions of DHA (0.1 M ) at elevated temperatures (180 °C) and reaction times less than 10 min.