Solketal Production via Solvent-Free Acetalization of Glycerol over Triphosphonic-Lanthanide Coordination Polymers

authors	Santos-Vieira, ICMS; Mendes, RF; Paz, FAA; Rocha, J; Simoes, MMQ
nationality	International
journal	CATALYSTS
author keywords	glycerol; acetalization; solketal; heterogeneous catalysis; coordination polymers; metal-organic frameworks
keywords	FUEL ADDITIVES
abstract	Biodiesel is one of the most significant and valuable alternatives to fossil fuels. In the process of transesterification to produce biodiesel from various feedstocks, glycerol is one of the side products obtained, in a high glycerol: biodiesel weight ratio (1:10). Therefore, the growing world demand for biodiesel prompted a glycerol surplus. It is, thus, of interest to find new and added-value paths for the transformation of this abundant chemical. One of the most auspicious glycerol applications is the production of fuel additives, namely cyclic acetals and ketals, from aldehydes and ketones, respectively. In this work, coordination polymers based on nitrile (trimethylphosphonic acid) and Ln(3+)/Eu3+ are used as catalysts for the acetalization of the bio-renewable glycerol into oxygenated fuel additives. Solketal is the major product obtained from the reaction of glycerol with acetone. This product improves the cold flow properties, lowering the viscosity of biodiesel, improving combustion, and boosting the octane number. The stability of the materials is studied as well as their recovery and reuse.
publisher	MDPI
isbn	2073-4344
year published	2021
volume	11
issue	5
digital object identifier (doi)	10.3390/catal11050598
web of science category	14
subject category	Chemistry, Physical
unique article identifier	WOS:000653576500001