Mechanism of the Liquid Phase Oxidation of Organic Compounds

Emanuel, N.M.; Заиков, Г. Е.; Maizus, Z. K.

doi:10.1016/b978-0-08-022067-3.50008-9

Cited by 3 publications

(7 citation statements)

References 61 publications

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“…Key challenges of such non-catalytic liquid phase oxidation are to control product selectivity because of the complex free radical process over-oxidation, to manage heat evolved during the exothermic reaction, and to overcome transport limitations in multiphase reactions. [4,5] Moreover, the reaction rates of the different steps of free radical processes are different, for instance, slow initiation, but instantaneous propagation and termination (Table 3). [4,5] Most of the current processes follow catalytic liquid and gas phase reactions by applying various oxidants such as air, oxygen, KMnO 4 , and Cr 2 O 3 .…”

Section: Autoxidation and Its Mechanismmentioning

confidence: 99%

“…[4,5] Moreover, the reaction rates of the different steps of free radical processes are different, for instance, slow initiation, but instantaneous propagation and termination (Table 3). [4,5] Most of the current processes follow catalytic liquid and gas phase reactions by applying various oxidants such as air, oxygen, KMnO 4 , and Cr 2 O 3 . [21][22][23] It is industrially preferred to use oxidants that are cheap, readily available, and environmentally benign, such as air.…”

Section: Autoxidation and Its Mechanismmentioning

confidence: 99%

“…Initiation commences with H-abstraction, influenced by factors like CÀ H bond strength, O 2 presence, initiators (peroxides), temperature, and light. [4,7,10,25] This step, typically the first step in the free radical oxidation process, is generally the slowest and demands higher activation energy. Different factors including the strength of the CÀ H bond, the presence of O 2 and initiators (peroxides), temperature, and light, Relative abundance of free radicals in bitumen and bitumen derived fractions at an analyte concentration of 3-6 wt %.…”

Section: Autoxidation and Its Mechanismmentioning

confidence: 99%

“…The availability of oxygen constrains the propagation step, crucial for oxygen transfer, as alkyl radicals react with oxygen extremely quickly. [4,5] Free radicals are highly reactive and can form an addition product (Step II) based on oxygen availability. Hence, regulating product selectivity hinges on oxygen availability transitioning from gas to liquid hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

“…Oxygen availability and temperature are important factors that influence ketone-to-alcohol selectivity. [4,7] Ketone can be selectively hydrogenated to alcohol which can be further used for olefin production. The process is catalytic and well described in the literature for the oxygenates obtained from the Fischer-Tropsch wax.…”

Section: Introductionmentioning

confidence: 99%

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Prospect of Controlled Autoxidation to Produce High‐Value Products from the Low‐Value Petroleum Fractions

Siddiquee

2024

The Chemical Record

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Substantial amounts of low‐value light petroleum fractions and low‐value heavy petroleum fractions, such as light naphtha, HVGO, and vacuum residue, are generated during the upgrading and refining of conventional and unconventional petroleum resources. The oil industry emphasizes economic diversification, aiming to produce high‐value products from these low petroleum fractions through cost‐effective and sustainable methods. Controlled autoxidation (oxidation with air) has the potential to produce industrially important oxygenates, including alcohols, and ketones, from the low‐value light petroleum fractions. The produced alcohols can also be converted to olefin through catalytic dehydration. Following controlled autoxidation, the low‐value heavy petroleum fractions can be utilized to produce value‐added products, including carbon fiber precursors. It would reduce the production cost of a highly demandable product, carbon fiber. This review highlights the prospect of developing an alternative, sustainable, and economic method to produce value‐added products from the low‐value petroleum fractions following a controlled autoxidation approach.

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Section: Autoxidation and Its Mechanismmentioning

confidence: 99%

Section: Autoxidation and Its Mechanismmentioning

confidence: 99%

Section: Autoxidation and Its Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Prospect of Controlled Autoxidation to Produce High‐Value Products from the Low‐Value Petroleum Fractions

Siddiquee

2024

The Chemical Record

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Kinetic Modeling of Liquid Phase Oxidation of Cyclohexane

Bhattacharya

Mungikar

2003

Can J Chem Eng

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A kinetic model for the liquid phase oxidation (LPO) of cyclohexane has been derived using a reaction network based on a consistent free radical mechanism. It was demonstrated that on embedding this rate model within the overall model of a semi‐batch gas‐liquid reactor (SBR) one can predict the time variation of the dissolved oxygen concentration and the rate of oxygen absorption which compare fairly closely with some well regarded published experimental data. The model is distinguished by easy extendibility and modularity whereby it could be tailored to predict, in the context of a SBR, cyclohexane conversion and ketone‐alcohol (K‐A) product selectivity levels as observed in commercial plants and in the published data on pilot plant experimentation. The model is expected to be of use in the design and scale‐up of LPO reactors.

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Novel One-Step, in Situ Thermal Polymerization Fabrication of Robust Superhydrophobic Mesh for Efficient Oil/Water Separation

Jiang

Zhang

et al. 2017

Ind. Eng. Chem. Res.

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In this work, a brand new one-step in situ thermal polymerization (ISTP) preparation of highly stable polymer-coated superhydrophobic materials has been reported. On the basis of the thermal initiation and nonvolatility of an ionic liquid (IL) precursor, robust polymeric layer could be in situ generated and coated to meshes under air atmosphere, while the anchored nanoparticles could provide hierarchical micro/nanostructure. An "oxidative crosslinking" effect was found, and the possible mechanism was proposed. As expected, the obtained mesh exhibited superhydrophobicity with water CA of 158°and superoleophilicity with oil CA of 0°. Besides, the mesh showed self-cleaning effect with a low sliding angle. As for application evaluation, the mesh could act as a filter for the highly efficient separation of a series of oil−water mixtures. More importantly, the mesh exhibited excellent stability and durability toward ultrasonic, abrasion treatment, long-term storage, and even under strongly acidic, alkaline, and saline environment conditions. In summary, this work provided a novel, facile, and scalable method in the fabrication of superhydrophobic surface.

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Mechanism of the Liquid Phase Oxidation of Organic Compounds

Cited by 3 publications

References 61 publications

Prospect of Controlled Autoxidation to Produce High‐Value Products from the Low‐Value Petroleum Fractions

Prospect of Controlled Autoxidation to Produce High‐Value Products from the Low‐Value Petroleum Fractions

Kinetic Modeling of Liquid Phase Oxidation of Cyclohexane

Novel One-Step, in Situ Thermal Polymerization Fabrication of Robust Superhydrophobic Mesh for Efficient Oil/Water Separation

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