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
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, 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)
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, Multidisciplinary
Yohan Martinetto, Bruce Pegot, Catherine Roch-Marchal, Mohamed Haouas, Betty Cottyn-Boitte, Franck Camerel, Jelena Jeftic, Denis Morineau, Emmanuel Magnier, Sebastien Floquet
Summary: This study characterized a new POM-based ionic liquid and demonstrated its properties as both a solvent and catalyst in organic transformations.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Fulai Liu, Xutao Gao, Rui Shi, Jinfan Xiong, Zhengxiao Guo, Edmund C. M. Tse, Yong Chen
Summary: This study reports an electrocatalytic strategy for the selective oxidation of KA oil to AA coupled with H2 evolution over a Co3O4/graphdiyne cooperative catalyst (Co3O4/GDY). Experimental studies reveal that GDY facilitates the enrichment of cyclohexanone on the catalyst surface and enhances the adsorption/activation of cyclohexanone.
ADVANCED FUNCTIONAL MATERIALS
(2023)
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
Chemistry, Physical
Dawid Lisicki, Beata Orlinska, Adam A. Marek, Jakub Binczak, Krzysztof Dziuba, Tomasz Martyniuk
Summary: An alternative method for synthesizing adipic acid (AA) of industrial importance has been presented. The method involves the solvent-free oxidation of a mixture of cyclohexane and cyclohexanone (CH/CH=O) with a cheap oxidizing agent like O-2 or air, under mild conditions using N-hydroxyphtalimide (NHPI) and transition metals as catalysts. The study showed that the CH/CH=O mixture oxidized faster than CH and CH=O separately due to the higher oxidizability of CH=O compared to CH. The presence of CH=O also increased the polarity of the reaction mixture, enhancing the solubility of NHPI. The study further investigated the influence of catalyst type and amount, CH/CH=O ratio, temperature, time, and oxidizing agent type on the composition of the oxidation products.
Article
Chemistry, Physical
Dawid Lisicki, Beata Orlinska, Tomasz Martyniuk, Krzysztof Dziuba, Jakub Binczak
Summary: This paper presents a catalytic system consisting of transition metals Co2+ and Mn2+ and alkyl nitrites R-ONO for the oxidation of cyclohexanone to adipic acid. The influence of catalyst, temperature, time, and raw material on conversion and product composition were investigated. The system showed high activity in the oxidation of cyclic ketones.
Article
Engineering, Chemical
Lujie Liu, Lu Liu, Kaidi Zhang, Mingyang Qin, Huimin Luan, Zhaochi Feng, Jiexun Chen, Liang Wang, Feng-Shou Xiao
Summary: This study reports a highly efficient catalyst for the selective conversion of cyclohexene to trans-2-methoxycyclohexanol with a yield as high as 95%. Mechanistic studies reveal that the siliceous beta zeolite facilitates the formation of efficient MoOx species, which are active for both the epoxidation and solvolysis of cyclohexene. The catalyst also exhibits activity for the conversion of other olefins.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Luis Gutierrez-Rus, Gloria Gamiz-Arco, J. A. Gavira, Eric A. Gaucher, Valeria A. Risso, Jose M. Sanchez-Ruiz
Summary: Enzymes catalyze the chemical reactions of life, and for nearly half of known enzymes, catalysis requires the binding of cofactors. This study identifies heme binding as a potential driver for the formation of ancestral polypeptide-cofactor complexes. Binding of heme to a flexible region in the ancestral structure enhances peroxidation catalysis by protecting the bound heme from degradation processes, resulting in a longer lifetime and higher effective concentration for the catalyst. This finding suggests that the protection of catalytic cofactors by polypeptides is a general mechanism to enhance catalysis and may have benefited primordial polypeptide-cofactor associations.
MOLECULAR BIOLOGY AND EVOLUTION
(2023)
Article
Engineering, Chemical
Trent F. Parker, Yufeng Quan, Benjamin A. Wilhite, Qingsheng Wang
Summary: In this study, the suitable operating regions for cyclohexanone synthesis were determined using response surface methodology, aiming to minimize heat release and maximize product yields. The results revealed that reaction temperature played the most significant role in both heat release and cyclohexanone yield.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Minyi She, Rongtian Gu, Deming Meng, Hua Yang, Yujie Wen, Xiaofeng Qian, Xiangke Guo, Weiping Ding
Summary: Nanosheets of nickel doped SAPO-34 molecular sieves with a thickness of around 10 nm were successfully prepared through a morphology-reserved synthesis method. The addition of an appropriate amount of nickel to the synthetic system was found to be crucial for the preservation of the nanosheet morphology. The nickel was confirmed to be doped in the framework of the molecular sieve, which helped balance the high surface energy of the nanosheet products. The resulting NS-Ni-SAPO-34 exhibited excellent catalytic performance for the oxidation reaction of cyclohexanone to adipic acid using gaseous oxygen.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
