Cooperative catalyst system for the synthesis of oleochemical cyclic carbonates from CO2 and renewables

Green Chem., 2016, Advance Article
DOI: 10.1039/C6GC00671J, Paper
Nils Tenhumberg, Hendrik Buttner, Benjamin Schaffner, Daniela Kruse, Michael Blumenstein, Thomas Werner
Taking Control! The binary catalyst system composed of MoO3 and an organic phoshponium salt [Bu4P]X proved very efficient to produce oleochemical cyclic carbonates from renewables.

Cooperative catalyst system for the synthesis of oleochemical cyclic carbonates from CO2 and renewables

*Corresponding authors
aLeibniz-Institut für Katalyse e. V. (LIKAT Rostock), Albert-Einstein-Str. 29 a, 18059 Rostock, Germany
bEvonik Industries AG, Paul-Baumann-Str. 1, 45772 Marl, Germany
cHobum Oleochemicals, Seehafenstraße 20, 21079 Hamburg, Germany
Green Chem., 2016, Advance Article

DOI: 10.1039/C6GC00671J.!divAbstract

Phosphonium salts and various (transition-) metals were studied as catalysts in the synthesis of carbonated oleochemicals from the corresponding epoxides and carbon dioxide. In combination with tetra-n-butylphosphonium bromide molybdenum compounds were identified as highly active co-catalysts for the formation of cyclic carbonates. The co-catalyst accelerates the conversion of the epoxidized fatty acid ester considerably.
The chemo- as well as the stereoselectivity of the carbonated oleochemicals can be controlled by the choice of the catalyst and the reaction conditions. Under optimized reaction conditions this new catalyst system allows the conversion of both mono- and polyepoxidized oleo compounds into the corresponding carbonates in good to excellent yields up to >99% under comparatively mild reaction conditions. This procedure has been applied to the synthesis of a potential renewable plasticizer and works well even at larger scale (200 g).
/////////Cooperative catalyst system, synthesis, oleochemical cyclic carbonates,  CO2, renewables