Article
Engineering, Chemical
Detao Pan, Guangxiao Li, Yuanhai Su, Huilong Wei, Zhenghong Luo
Summary: A comprehensive model for the adipic acid production reaction based on kinetic study was developed, showing a significant impact of temperature and nitric acid concentration on the formation rate of adipic acid. The model accurately predicted the yield of adipic acid at different temperatures, providing valuable insights for industrial tubular reactor design.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Simone Fernandes, Fatima Mirante, Baltazar de Castro, Carlos M. Granadeiro, Salete S. Balula
Summary: This study investigated the correlation between polyoxotungstate structures and their catalytic performance in oxidative desulfurization processes. Results showed that the Lindqvist catalyst achieved faster desulfurization with lesser amount of catalyst and oxidant. The reusability of the Lindqvist-type catalyst was also confirmed for consecutive oxidative desulfurization processes.
Article
Chemistry, Multidisciplinary
Ran Wang, Yikun Kang, Jianxiang Wu, Tao Jiang, Yongjie Wang, Limin Gu, Yefei Li, Xuejing Yang, Zhipan Liu, Ming Gong
Summary: Incorporating Cu2+ into a Ni hydroxide lattice improves the efficiency of electrocatalytic oxidation of cyclohexanol into adipic acid, facilitating sustainable production of adipic acid.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Applied
Joao Carlos S. Soares, Arthur Henrique A. Goncalves, Fatima M. Z. Zotin, Lucia R. Raddi de Araujo, Alexandre B. Gaspar
Summary: The one-step oxidative cleavage of cyclohexene to adipic acid using H2O2 as oxidizing agent and heteropolysalts as heterogeneous catalysts was successfully achieved without additives. The best catalyst K3PW12O40 calcined at 600 degrees C showed the highest yield of adipic acid (83%). The reaction mechanism involved primary oxidation of cyclohexene and observed undesirable parallel reactions such as rearrangement of 1,2-cyclohexanediol and allyl oxidation.
Article
Green & Sustainable Science & Technology
Yinshan Liu, Lei Ni, Hang Yao, Jimi Su, Zhen Cheng
Summary: The effects of sulfuric acid (H2SO4) and H2O2 stabilizer (EDTA) on the thermal hazard of H2O2 decomposition and the green synthesis of adipic acid were investigated in this study. Various calorimetry techniques were used to characterize the exothermic behavior of the reactions. An HPLC device was used to analyze the yield of adipic acid and the conversion rate of the raw materials. The addition of H2SO4 and EDTA reduced the exothermic heat of the reactions and increased the yield of adipic acid.
Article
Engineering, Environmental
Guangrong Liu, Mingxin Chen, Xin Jin, Chuangfu Song, Feifei He, Qiang Huang
Summary: In this study, PTA-TiO2 composite catalysts were prepared and characterized. The heat treatment temperature was found to significantly affect the composition and structure of the composite, with higher temperatures leading to destruction of the Keggin structure. A synergistic effect between photo- and thermal catalysis was observed, resulting in improved conversion of cyclohexene and yield of adipic acid.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Kamil Peckh, Dawid Lisicki, Ewelina Pabich, Beata Orlinska
Summary: Adipic acid is an important commercially available aliphatic dicarboxylic acid, but its production process generates nitrous oxide which is difficult to utilize. This paper proposes an alternative method using a two-stage reaction to reduce N2O production and achieve adipic acid synthesis. The method involves oxidizing cyclohexene to epoxide using hydrogen peroxide in the first stage, followed by oxidation of 1,2-cyclohexanediol with oxygen in the second stage. The use of this method can significantly reduce N2O production compared to industrial methods.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Engineering, Chemical
Wei Jiang, Lei Ni, Juncheng Jiang, Qiang Chen, Zhiquan Chen, Shuliang Ye
Summary: This study utilized calorimetric and analytical techniques to evaluate the thermodynamics of the preparation of adipic acid through hydrogen peroxide oxidation, revealing possible macroscopic reaction pathways and the potential for catastrophic accidents if control is lost. The results indicate the need to improve inherent safety measures in order to scale up the reaction process.
Article
Chemistry, Inorganic & Nuclear
Sa Yao, Clement Falaise, Soumaya Khlifi, Nathalie Leclerc, Mohamed Haouas, David Landy, Emmanuel Cadot
Summary: The study demonstrates that the interaction strength between gamma-CD and oxidized or one-electron reduced POMs decreases as the global ionic charge of the POM unit increases. The addition/removal of one electron to POMs, particularly those with molybdenum and vanadium addenda, allows for tuning the host-guest association strength, offering a new avenue for the design of smart materials through redox stimuli.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Ke Wang, Shuo Feng, Pengtao Ma
Summary: A novel organic-inorganic hybrid lanthanide-based polyoxometalate was synthesized and characterized by various analytical methods, showing lower energy transfer efficiency. Time-resolved emission spectroscopy revealed intramolecular energy transitions that sensitize Tb3+ ions in the compound.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Jan-Christian Raabe, Jakob Albert, Maximilian J. Poller
Summary: This study investigates the possibility of adjusting the RedOx activity of polyoxometalate catalysts by introducing an additional RedOx-active element. Keggin-type polyoxometalates (POMs) with multiple different elements are synthesized, and their structures and characteristics are comprehensively characterized using various analytical methods.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Mengyuan Cheng, Haiying Wang, Yufeng Liu, Jingwen Shi, Mingqi Zhou, Weixin Du, Dongdi Zhang, Guoping Yang
Summary: We synthesized and characterized a uranium-containing selenotungstate compound with remarkable photoluminescence properties. The compound was obtained by a one-pot reaction of uranium nitrate, sodium tungstate, and sodium selenite. The introduction of lone-electron pair containing heteroatoms resulted in a unique structure comprising a three-layered heterometallic cluster encapsulated by two different anionic building block units. The compound exhibited strong photoluminescence emission and a high quantum yield.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yongye Zhao, Hongyan Xiao, Chen-Ho Tung, Li-Zhu Wu, Huan Cong
Summary: A new macrocycle RhombicArene has been developed, which forms a host-guest complex with CHON through C-H···π interactions and hydrogen bonds. The nonporous adaptive crystals of RhombicArene exhibit excellent capability for rapid, exclusive, and recyclable vapor adsorption of CHON in the presence of CHOL under mild and user-friendly conditions in just 30 minutes.
Article
Chemistry, Physical
Joao Carlos S. Soares, Fatima M. Z. Zotin, Lucia R. Raddi de Araujo, Arthur Henrique A. Goncalves, Alexandre B. Gaspar
Summary: The study focuses on the effect of different calcination temperatures on the solubility and acidity of heteropolysalts catalysts, as well as the influence of reaction temperature on the conversion and distribution of products in the oxidation of cyclohexene. The results show that the catalyst synthesis was successful, and the thermal treatments did not affect the structures of the polyanions. The solubility of the catalyst was found to be related to the reaction medium, and the acidity of the catalyst played a crucial role in the formation of the desired product.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Siva Prasad Mekala, Marimuthu Prabu, Sheetal Datta Gawali, Karthik Gopakumar, Pranjal Gogoi, Akash Ravindra Bhatkar, Gourab Mohapatra, Eeswar Unnikrishanan, Thirumalaiswamy Raja
Summary: The article introduces a hydrothermal method for preparing iron and tungsten oxide incorporated mesoporous carbon catalysts and investigates their catalytic performance in cyclohexanone oxidation. The experimental results show that the appropriate loading of metal oxide plays a key role in the selectivity of the catalyst.
CATALYSIS COMMUNICATIONS
(2022)
