Selective oxidation of glucose–galactose syrup to gluconic and galactonic acids

Joseph Install (Avtor), Anže Zupanc (Avtor), Seonyeong Kim (Avtor), Wenjia Wang (Avtor), Marianna Kemell (Avtor), George W. Huber (Avtor), Timo Repo (Avtor)

Povzetek

The global food industry, inclusive of dairy, is searching for sustainable upgrading of the large volumes of inedible waste they produce. Presented here is the selective oxidation of Greek yoghurt acid-whey derived glucose–galactose syrup (GGS) to gluconic and galactonic acids. Aldonic acids are high value biproducts with many applications. Our straightforward approach combines efficient catalytic oxidation and simple separation to upgrade a large dairy waste product to higher value products under base free conditions, using an Au/Al$_2$O$_3$ catalyst with 73% and 55% selectivity towards gluconic and galactonic acids, respectively, under conditions of 2.5 bar O$_2$ for 24 h at 80 °C with a low Au : GGS ratio of 1 : 1000. A selective separation method was developed allowing the separation of the two epimeric acids based solely on their solubilities with high purity.

Ključne besede

trajnostni razvoj;valorizacija odpadkov;zelena kemija;oksidacija;sladkorji;glukoza;galaktoza;glukonska kislina;galaktonska kislina;sustainability;waste valorization;green chemistry;oxidation;sugars;glucose;galactose;gluconic acid;galactonic acid;

Podatki

Jezik:	Angleški jezik
Leto izida:	2025
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK:	547.455.62:542.943
COBISS:	238505219
ISSN:	1463-9270
Št. ogledov:	63
Št. prenosov:	12
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	trajnostni razvoj;valorizacija odpadkov;zelena kemija;oksidacija;sladkorji;glukoza;galaktoza;glukonska kislina;galaktonska kislina;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 6725-6733
Letnik:	ǂVol. ǂ27
Zvezek:	ǂiss. ǂ23
Čas izdaje:	21 Jun. 2025
DOI:	10.1039/D5GC01381J
ID:	27174977