Carbon nanotubes as catalyst for the aerobic oxidation of cumene to cumene hydroperoxide

Carbon nanotubes catalysis in liquid-phase aerobic oxidation of hydrocarbons: Influence of nanotube impurities

“…The addition of an acceptor of free radicals (namely, p-benzoquinone) to the reaction system almost completely retarded the oxidation process. The authors associate the catalytic activity of the MWCNTs with the initial formation of a complex of CNTs O 2 and further development of the reaction by a radical mechanism according to the following scheme: In another study [32], the authors describe the aerobic liquid-phase oxidation of ethylbenzene in the presence of CNTs obtained and processed similarly to those in the previously mentioned work [31]. In this case, a significant catalytic effect was observed from the use of CNTs.…”

“…In one example, an industrially oriented process (Shen-zhen Nanotech Port Co. Ltd) nanotubes ware used for the oxidation of cumene [31]. The CNTs material was preliminarily purified with hydrochloric acid, then washed with deionised water to pH = 6-7 and dried with hot air at 110°C for 24 h. The use of such MWCNTs for the oxidation of cumene at 80°C, an oxygen flow rate of 10 ml/min and the amount of MWCNTs added 10 g/l resulted in a hydrocarbon conversion of 24.1% and a selectivity of formation of cumene hydroperoxide of 88.4%.…”

“…Based on the results of these studies, it is argued that catalytic systems based on CNTs are a good alternative to the well-known traditional oxidation catalysts based on metal-containing compounds [36,37]. Nevertheless, in evaluating the outcomes of the above articles [31][32][33][34][35][36][37], it is evident that none of them investigated the nature and content of metallic impurities originating from CNTs synthesis. Metal analysis has not been undertaken despite the fact that all the CNTs samples were obtained by the CVD method in the presence of various metal catalysts.…”

A new highly active La2O3–CuO–MgO catalyst for the synthesis of cumyl peroxide by catalytic oxidation

“…2,3 CHP is used in industry as an initiator for chain autoxidation and polymerization reactions, an accelerator for rubber vulcanization, an oxidant in ne chemicals, and in polymer synthesis. 4,5 Phenol is an important raw material for phenol resins, perfumes, medicines, agricultural chemicals, and many other industries. 6 At present, more than 90% of phenol production in the world is based on this route.…”

Selective oxidation of cumene into 2-phenyl-2-propanol and acetophenone over activated carbon supported Co1.5PW12O40 material

“…Oxidation of hydrocarbons is a key challenge in petrochemical industrial processes due to the efficient conversion from cheap petroleum feed stocks to value-added oxygenated compounds (Liao et al 2014, Labinger 2016, Silva et al 2017, Nesterov et al 2018, Xu et al 2018. Oxidation of cumene into 2-phenyl-2propanol (Ph-PrOH) and acetophenone (Ph = O) is one of such reactions.…”