Calcium waste as a catalyst in the transesterification for demanding esters: scalability perspective

• Anton N. Potorochenko and
• Konstantin S. Rodygin

Beilstein J. Org. Chem. 2025, 21, 1520–1527, doi:10.3762/bjoc.21.114

• amounts of 1–5 wt %. Keywords: biodiesel; calcium oxide; carbide slag; ester; transesterification; Introduction The ester moiety in molecules is one of the most important functional groups, which is widespread in nature, products of fine organic synthesis, and large-scale chemical manufacturing [1][2][3

• , and minor components did not affect the reaction or were inert. Since the transesterification with a catalyst derived from carbide slag (CS600) and commercial (or obtained from another source) calcium oxide proceeds by the same mechanism with the formation of a new ester and an alcohol as byproduct

Valorisation of plastic waste via metal-catalysed depolymerisation

• Francesca Liguori,
• Carmen Moreno-Marrodán and
• Pierluigi Barbaro

Beilstein J. Org. Chem. 2021, 17, 589–621, doi:10.3762/bjoc.17.53

• compounds, with the notable exception of calcium oxide, which gave ʟ,ʟ-lactide from PLLA in ≈98% yield at 250 °C [263]. Alcoholysis. The solvolytic depolymerisation of PLA was mostly reported using zinc-based catalysts, ethanol or methanol agents, wherein a higher reactivity of the latter was ascribed to