Aminolysis of triglycerides using nanocrystalline nickel doped CaO as an efficient solid catalyst

Abstract

Present manuscript reports the preparation of Ni doped CaO in nanocrystalline form, using wet chemical method, and investigation of their catalytic activity towards aminolysis of variety of triglycerides with diethanolamine. The powder XRD study suggested the formation of a solid solution of NiO in CaO as long as nickel content in catalyst remain ≤ 5 wt%. Transmission electron microscopy study supported the formation of Ni/CaO particles in the form of nanorods at 650 °C calcination temperature. Catalyst activity was found to be a function of basic strength which in turn depends upon the catalyst calcination temperature. Catalyst prepared by 0.5 wt% Ni doping in CaO at 650 °C was found to complete the aminolysis (> 99% amide yield) of waste cottonseed oil within 0.5 and 3.0 h at 110°C and room temperature (35 °C), respectively. The catalyst was easily recovered from the reaction mixture by simple filtration and reused during seven consecutive reaction cycles without significant loss in activity. The (pseudo) first order rate constant and activation energy for the reaction was observed 0.15 min -1 and 52.7 kJ mol -1 , respectively.

Chemoenzymatic Synthesis and Anti-Inflammatory Activity of Fatty Acid Amides Prepared from Bertholletia excelsa (Brazil Nut) Triglycerides

“…45 To investigate the cytotoxicity of FAA triglyceride derivatives from Brazil nut oil on macrophages, we used the MTT assay. The cells were treated with different doses (5,10,20,50, 100, 250, 500 µg mL -1 ) of the FAA compounds for 72 h. The CC 50 value determined in the assay for these FAA was 455 µg mL -1 , demonstrating reduced cell toxicity (Figure 4). Matysiak et al 46 examined the cytotoxicity of methyl esters of ricinoleic acid and their fatty amide derivatives.…”

“…One alternative for obtaining fatty amides is via their direct synthesis from triglycerides; 18 however, high temperatures are necessary for this process, in some cases. [19][20][21] The green chemistry concept has intensified the search for sustainable synthetic methodologies, and the identification and use of enzymatic catalysts have been of particular interest. Advantages of the application of enzymes in chemical synthesis include their high catalytic activity, and high chemo-, regio-, and stereoselectivity.…”

Synergistic Trimetallic Nanocomposites as Visible–NIR–Sunlight-Driven Photocatalysts for Efficient Artificial Photosynthesis

“…The reaction product HCOOH is very useful and possesses a high volumetric capacity for hydrogen storage and has low toxicity and flammability . The minor product CH 3 OH is also a useful reagent for biofuel generation in direct methanol fuel cells. − …”

The GABAergic System and Endocannabinoids in Epilepsy and Seizures: What Can We Expect from Plant Oils?

“…Synthetic endocannabinoids, such as fatty acid amides, can be obtained from triglycerides and/or fatty acids in the presence of metallic catalysis [ 90 , 91 ] or biocatalysis [ 92 , 93 ]. Another possibility is based on the aminolysis of fatty acids ( Figure 3 ), and their different pharmacological properties are attributed to the presence of the amide functional group in their molecules [ 94 , 95 , 96 ].…”