One pot menthol synthesis via hydrogenations of citral and citronellal over montmorillonite-supported Pd/Ni-heteropoly acid bifunctional catalysts was written by Shah, Abdul Karim;Maitlo, Ghulamullah;Shah, Aqeel Ahmed;Channa, Iftekhar Ahmed;Kandhro, Ghulam Abbas;Maitlo, Hubdar Ali;Bhatti, Umair Hassan;Shah, Ahmed;Memon, Abdul Qayoom;Jatoi, Abdul Sattar;Park, Yeung Ho. And the article was included in Reaction Kinetics, Mechanisms and Catalysis in 2019.COA of Formula: C10H22O The following contents are mentioned in the article:
Menthol synthesis is possible through citral and citronellal hydrogenations via following multistage chem. reactions such as hydrogenation and cyclization. This research mainly focuses on a design of selective, active and cost-effective metal-acid (bifunctional) catalysts for menthol production via citral and citronellal hydrogenations. More specifically, Pd and Ni metals were impregnated over acidic support (e.g., hetero-poly acid supported montmorillonite, HPA_MM). The prepared catalysts were characterized by BET, pyridine adsorption and amine titration methods. Some of the most important parameters such as metal type and loading; applied pressure and reaction time have been investigated throughout this work. The obtained results reveals that the 8 wt% Ni-HPA-MM catalyst (Cat-5) has produced 63% menthols (initial reaction rate 0.126 mmol/min) from citral hydrogenation (80°C, 1.0 MPa) within 24 h. Similarly, during lower applied pressure (0.5 MPa), the production of menthol was significantly improved (approx. 98% of menthol, initial reaction rate ~0.138 mmol/min) with the application of 8 wt% Ni-HPA-MM catalyst (Cat-5) in citronellal hydrogenation. Higher menthol selectivity was achieved from both reactions (citral and citronellal hydrogenation) which might be due to the presence of strong Lewis and medium Bronsted acid sites. This study involved multiple reactions and reactants, such as 3,7-Dimethyloctan-1-ol (cas: 106-21-8COA of Formula: C10H22O).
3,7-Dimethyloctan-1-ol (cas: 106-21-8) belongs to alcohols. Under appropriate conditions, inorganic acids also react with alcohols to form esters. To form these esters, a wide variety of specialized reagents and conditions can be used. The most common reactions of alcohols can be classified as oxidation, dehydration, substitution, esterification, and reactions of alkoxides.COA of Formula: C10H22O
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts