Abstract
The valorization of glycerol (1), a waste of biodiesel production of Fatty Acid Methyl Esters (FAMEs), adopting a “green” approach, represents an important goal of sustainable chemistry. While the polymerization of 1 to hyperbranched oligomers is a well-established process, the linear analogues are difficult to obtain. In this context, we explore the reaction without the solvent of heterogeneous hybrid La(III)O-KIT-6 catalyst (2), which is based on lanthanum oxide on mesoporous silica gel, showing a superior linear selectivity compared to most of the analogous catalysts recently reported.
Highlights
Glycerol (1) (1,2,3-propanetriol) is a non-toxic, edible, biosustainable and biodegradable compound.It is obtained from the fermentation of glucose, hydrogenolysis of sorbitol, and as by-product of biodiesel production from vegetable oils [1]
Linear polyglycerols are essentially used as surfactants after conversion to fatty acid esters, and they can replace polyethylene glycol (PEG), which is produced from ethylene oxide of petroleum origin
These conclusions were confirmed by powder X-ray diffraction (PXRD) spectra, where the broad
Summary
Glycerol (1) (1,2,3-propanetriol) is a non-toxic, edible, biosustainable and biodegradable compound It is obtained from the fermentation of glucose, hydrogenolysis of sorbitol, and as by-product of biodiesel production from vegetable oils [1]. High selectivity in linear diglycerol is obtained with CsHCO3 as aa homogeneous homogeneous catalyst, catalyst, but but at at aa low low conversion conversion of of glycerol glycerol [12]. WeWe report widely available such as mesoporous reporthere herethe the synthesis, synthesis, characterization, characterization, and and catalytic performances performances of the hybrid material La(III)@KIT-6, which conjugates the amphoteric properties of the lanthanum oxide [25,26], enabling a bifunctional catalysis, with the possibility of governing the selectivity selectivity of polymerization polymerization by by means means of mesoporous silica gel pores sizes [17,21]
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