Carbon black-polydopamine-ruthenium composite as a recyclable boomerang catalyst for the oxidative cleavage of oleic acid

From Deep Eutectic Solvents to Nitrogen‐rich Ordered Mesoporous Carbons: A Powerful Host for the Immobilization of Palladium Nanoparticles in the Aerobic Oxidation of Alcohols

“…Based on the positive hot‐filtration test, most likely the catalytic reaction was caused by the leached soluble (homogeneous) Pd species. But according to high observed recyclability and durability of the present catalyst system, it seems that the Pd catalyst is indeed working in a boomerang‐type catalyst that means active species re‐incorporate with solid surface after separation from catalyst surface and quite reaction catalysis so that all the starting material is consumed [97–102] . To put in nut shells, such catalysts can be recovered and reused repeatedly several times without any loss in efficiency.…”

“…But according to high observed recyclability and durability of the present catalyst system, it seems that the Pd catalyst is indeed working in a boomerang-type catalyst that means active species re-incorporate with solid surface after separation from catalyst surface and quite reaction catalysis so that all the starting material is consumed. [97][98][99][100][101][102] To put in nut shells, such catalysts can be recovered and reused repeatedly several times without any loss in efficiency. However, to be sure that boomerang or release and catch system is operative, the recycling experiment in the aerobic oxidation of benzyl alcohol under optimal reaction conditions described in entry 1 in Table 2, have been investigated at incomplete conversion level (after 2 h in each run).…”

Ru on Modified Carbon Submicrometric Spheres as Novel Catalysts for the Oxidative Cleavage of Oleic Acid with N‐Methylmorpholine‐N‐Oxide as Green Oxidizing Agent

“…This was not the case for CCN‐PDA‐Ru(2 %) since the functionalized catalyst with polydopamine maintained almost the same Ru loading as before performing the successive oxidative cleavage runs. From our previous experiences with oxidized carbon black functionalized with PDA, we know that the polymer has the capability to recover Ru ions instead of keeping attached Ru during the whole catalytic test [47] …”

Catalyst and reactor design considerations for selective production of acids by oxidative cleavage of alkenes and unsaturated fatty acids with H2O2

“…4,5 Oxidative cleavage of unsaturated fatty acids (UFAs) obtained from triglycerides or formed by fermentation provides one promising route to replace fossil resources with biomass-derived intermediates, such as through the production of mono- and di-acids from oleic acid (OA). 6,7 OA is the most abundant naturally occurring fatty acid, 8–10 and the products of oxidative cleavage ( i.e. , nonanoic acid and azelaic acid) are valuable monomers for synthesis of polyamides and plasticizers.…”

“…4,5 Oxidative cleavage of unsaturated fatty acids (UFAs) obtained from triglycerides or formed by fermentation provides one promising route to replace fossil resources with biomass-derived intermediates, such as through the production of mono-and di-acids from oleic acid (OA). 6,7 OA is the most abundant naturally occurring fatty acid, [8][9][10] and the products of oxidative cleavage (i.e., nonanoic acid and azelaic acid) are valuable monomers for synthesis of polyamides and plasticizers. [11][12][13][14] Industrially, azelaic acid has been produced by oxidizing OA with ozone generated by passing oxygen through an electrical discharge field, 15 however, this process requires high energy and technologic demand for ozone utilization.…”