2-Methylcyclohexanol

Green, aerobic oxidation of secondary alcohols to ketones poses a significant synthetic challenge. To address this, we have developed a highly active (DPA)CuI/ABNO catalyst system capable of aerobically oxidizing a wide range of secondary alcohols, including benzylic and aliphatic derivatives, yielding the corresponding ketones with high yields. The unique feature of this Cu(I) catalyst is its high stability, even in the presence of water. We also prepared CuI from waste copper sources to enhance the system′s sustainability.

Waste fried oil (WFO) and coal gasification fine slag (CGFS) are both environmentally hazardous wastes, and the flotation separation of resources from CGFS is over-reliant on non-renewable petrochems. as collectors, it is significant to utilize WFO to prepare renewable collectors for CGFS separationIn this study, six surfactants were selected to be compounded with WFO to prepare renewable collectors, and the flotation effect of the compounded collectors on CGFS and the surfactant-enhanced mechanism for WFO flotation effect were examined through flotation experiments, flotation kinetics experiments, laser particle size anal., FTIR anal., XPS anal., and induction time tests.The results show that WFO alone needs to be used in a large dosage (>30 kg/t) in order to show better flotation performance than diesel, while the flotation performance is greatly improved after compounding with surfactants, among which the best effect is achieved with Span80, and the dosage cut-off point of the compounded collector for flotation better than diesel is reduced to 12.5 kg/t.The surfactant can make the dispersed droplet size of WFO in water decrease from D50= 120 μm to 5.63 μm.Meanwhile, the surfactant-assisted WFO can be adsorbed on the residual carbon surface of CGFS through hydrophobic and hydrogen-bonding forces, which can mask the hydrophilic region of the carbon surface and enhance its hydrophobicity.Surfactant-assisted WFO can further shorten the adhesion induction time between CGFS particles and air bubbles, thus facilitating the recovery of more residual carbon in a shorter period of time.The findings can provide theor. basis and tech. support for the resourceful disposal of WFO and CGFS synergistically.