Гідрогеноліз дисахаридів до пропіленгліколю на мідьвмісних оксидах

• Date: 2024
• Main Authors: Varvarin, Anatolii M., Horbaniuk, Ivan S., Trachevskiy, Volodymyr V., Brei, Volodymyr V.
• Format: Article
• Language: Ukrainian
• Published: V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine 2024
• Subjects: гідрогеноліз; цукроза; мальтоза; пропіленгліколь; мідьвмісний каталізатор
• Online Access: https://kataliz.org.ua/index.php/journal/article/view/113
• Journal Title: Catalysis and petrochemistry

The hydrogenolysis of 10 % methanol-water solutions of sucrose and maltose to propylene glycol on supported copper-containing catalysts in flow reactor was studied. The highest concentration of propylene glycol in the reaction products (0.23 mmol/ml) has been obtained in the hydrogenolysis of sucrose on  23Cu-1Cr2O3/Al2O3 catalyst with its full conversion at 170 °C/4.0 MPa H2 and a load on catalyst of 0.8 mmol С12Н22О11/gcat/h. At that, the catalyst productivity towards propylene glycol consists 0.7 mmol/gcat/h. Hydrogenolysis of maltose in these conditions is characterized by 81 % conversion and low (0.04 mmol/ml) concentration of propylene glycol in the reaction products. The main byproducts of sucrose hydrogenolysis are ethylene glycol, hydroxyacetone, 1,2-butanediol, 1,4-butanediol and sorbitol. Concentration of propylene glycol in the reaction products of sucrose hydrogenolysis on 23Cu-1Cr2O3/Al2O3 does not change significantly  (0.23-0.18 mmol/ml) during 18 h of catalyst operation. Сomparison of the productivities of 23Cu-1Cr2O3/Al2O3 catalyst to propylene glycol in hydrogenolysis of 10 % solutions of sucrose (0.7 mmol/gcat/h) and glucose (0.9 mmol/gcat/h) suggests that glucose is more suitable for the production of propylene glycol than studied disaccharides.