Reaction Chemistry & Engineering最新文献_第2页

Iron-loaded pure silica -SVR zeolite for the hydroxylation of phenol† 载铁纯二氧化硅-SVR沸石对苯酚†的羟基化反应

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-19 DOI: 10.1039/D5RE00013K

Wenwen Song, Haodong Xie, Li Liu, Xiang Ni, Yuan Xue, Yan Liu, Junwen Chen, Lei Wang and Hongjun Zhu

{"title":"Iron-loaded pure silica -SVR zeolite for the hydroxylation of phenol†","authors":"Wenwen Song, Haodong Xie, Li Liu, Xiang Ni, Yuan Xue, Yan Liu, Junwen Chen, Lei Wang and Hongjun Zhu","doi":"10.1039/D5RE00013K","DOIUrl":"https://doi.org/10.1039/D5RE00013K","url":null,"abstract":"Dihydroxybenzene compounds are a type of crucial fine chemicals used in daily life, but their production process is severely constrained by contamination and relatively low efficiency. In this work, the iron-containing pure silica -SVR zeolite was successfully developed and proven to be an efficient catalyst in the conversion of phenol into dihydroxybenzene compounds in a green way. Notably, in the presence of hydroperoxide, the heterogeneous-mediated oxidative process achieved a record-high conversion of 37% and selectivity of 99%. Combining physicochemical analysis and multiple spectroscopic techniques, the active species was confirmed to be the trivalent iron sites confined within the -SVR voids. Moreover, the accessible ordered silanol defects confined within the -SVR channel system are abundant, providing anchor points for grafting iron sites. The highly active iron species initiates the free radical-mediated reaction pathway, significantly facilitating the oxidative reaction process. As unveiled by the catalytic kinetics, the iron-containing zeotype catalyst affords a TON of 861 and TOF of 430.5 h−1, and the apparent active energy Ea was determined as 26 kJ mol−1. Overall, these results not only provide a highly effective heterogeneous catalyst for the conversion of phenol into dihydroxybenzene compounds in an eco-friendly manner but also open up new horizons for the effective utilization of pure silica zeolites listed in the IZA database.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1259-1267"},"PeriodicalIF":3.4,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient one-pot hydrogenation and acetylation of 4-nitrophenol for selective synthesis of 4-aminophenol and paracetamol with a reusable Ni catalyst† 可重复使用镍催化剂†催化4-硝基苯酚一锅加氢和乙酰化选择性合成4-氨基苯酚和扑热息痛

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-19 DOI: 10.1039/D5RE00016E

Ziliang Yuan, Xi Wang, Yuxin Liu, Peng Zhou, Renjie Huang, Jie Lv, Yimeng Yang, Yanrong Ren, Zehui Zhang and Bing Liu

引用次数: 0

Rapid preparation of waterborne polyurethane dispersions using continuous-flow microreaction technology† 用连续流微反应技术快速制备水性聚氨酯分散体

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-18 DOI: 10.1039/D5RE00015G

Wenjun Huang, Xuanyu Chen, Qianjiang Lv, Xiaolan Cai, Wei Tan and Yanxiong Fang

{"title":"Rapid preparation of waterborne polyurethane dispersions using continuous-flow microreaction technology†","authors":"Wenjun Huang, Xuanyu Chen, Qianjiang Lv, Xiaolan Cai, Wei Tan and Yanxiong Fang","doi":"10.1039/D5RE00015G","DOIUrl":"https://doi.org/10.1039/D5RE00015G","url":null,"abstract":"This paper provides a strategy for the preparation of waterborne polyurethane (WPU) dispersions by continuous-flow microreaction technology. The strategy starts with the preparation of polyurethane prepolymers in a continuous-flow reactor, followed by emulsification and post-chain expansion reaction in a high-speed disperser to produce M-WPU. Compared with B-WPU preparation in a traditional batch reactor, the continuous-flow microreaction technology can shorten the polymerization time from several hours to several minutes, which greatly improves the production efficiency. Meanwhile, the optimal process conditions were determined by investigating the effects of solvent dosage, catalyst type and dosage, reaction temperature, reaction residence time, total flow rate, and reactor configuration on the extent of reaction of polyurethane prepolymers as well as the effects of neutralization residence time and neutralization temperature on the particle size of WPU. Finally, the films of M-WPU and B-WPU were characterized and tested, and it was found that the M-WPU film exhibited higher molecular weight, tensile strength, hardness, larger water contact angle, better heat resistance, and lower water absorption compared with the B-WPU film prepared by the traditional batch process. This suggests that the continuous-flow microreactor process provides an efficient and promising method for the preparation of WPU.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1326-1336"},"PeriodicalIF":3.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxygen vacancy-enriched MOF-derived Mn2O3 catalysts for high-efficiency direct synthesis of ethylene urea from CO2† 富氧空位mof衍生的Mn2O3催化剂用于CO2直接高效合成尿素乙酯

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-18 DOI: 10.1039/D5RE00061K

Fei Wang, Yulong Jin, Yue Zhang, Xuan Liang, Zihao Tong, Xuejiao Wei, Yihu Ke, Jie Xu and Bing Xue

{"title":"Oxygen vacancy-enriched MOF-derived Mn2O3 catalysts for high-efficiency direct synthesis of ethylene urea from CO2†","authors":"Fei Wang, Yulong Jin, Yue Zhang, Xuan Liang, Zihao Tong, Xuejiao Wei, Yihu Ke, Jie Xu and Bing Xue","doi":"10.1039/D5RE00061K","DOIUrl":"https://doi.org/10.1039/D5RE00061K","url":null,"abstract":"The direct reaction of CO2 with ethylene diamine (EDA) to produce ethylene urea (EU) provides significant potential for the resourceful utilization of CO2. Herein, we systematically synthesized a series of Mn2O3 catalysts by pyrolyzing the corresponding metal–organic framework (MOF) precursor with different calcination temperatures to evaluate their catalytic activity in the synthesis of EU from CO2. Among them, MnBDC-400 exhibited the highest reactivity for EU formation, which reached 96% EDA conversion and 98% EU selectivity, even at a lower temperature (120 °C). This result was superior to all previously reported catalysts. The excellent activity benefited from more surface oxygen vacancies and Mn3+ species on the surface of MnBDC-400, which facilitated the formation of ethylenediamine carbamate (EDA-CA) intermediates, leading to improved EU yields. This work has a certain guiding significance for the preparation of highly active MOF-derived oxide catalysts for CO2 conversion.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1399-1407"},"PeriodicalIF":3.4,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient selective hydrogenation of benzonitrile over TiO2-supported nickel catalysts† 二氧化钛负载镍催化剂上苯腈的高效选择性加氢研究

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-17 DOI: 10.1039/D5RE00024F

Yinkun Li, Dongxue Wang, Xixi Liu, Guoqiang She, Peng Zhou, Yanxi Zhao, Zehui Zhang and Bing Liu

引用次数: 0

Open-source fraction collector for flash column chromatography and continuous flow reactions† 开源馏分收集器的闪蒸柱色谱和连续流动反应†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-14 DOI: 10.1039/D5RE00070J

Yuesu Chen, Cassian Desmons, Martin Cattoen and Jean-Christophe M. Monbaliu

引用次数: 0

Is it reliable to determine the stoichiometry of extraction complexes using the classic slope analysis model in acidic extraction systems?† 在酸性萃取系统中，用经典的斜率分析模型来确定萃取物的化学计量是否可靠？__

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-14 DOI: 10.1039/D4RE00596A

Qi Zhao, Shuai Wang and Kaimin Shih

引用次数: 0

Development of site- and stereoselective continuous flow deuterium labelling method for carbohydrates using high dispersion effect towards Ru/C of hydrogen flow† 利用氢流对Ru/C的高分散效应，建立了原位和立体选择性连续流碳水化合物氘标记方法

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-11 DOI: 10.1039/D5RE00026B

Naoya Sakurada, Daiki Sasaki, Manato Ono, Tsuyoshi Yamada, Takashi Ikawa and Hironao Sajiki

引用次数: 0

The synergistic effect of a novel photocatalyst based on triazine with 2-aminoanthraquinone for the Beckmann rearrangement in batch and a simple hand-made continuous flow photocatalytic reactor† 基于三嗪和2-氨基蒽醌的新型光催化剂在批量贝克曼重排中的协同作用和简单的手工连续流光催化反应器†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-11 DOI: 10.1039/D4RE00612G

Mona Hosseini-Sarvari and Mohammad Namjoo

{"title":"The synergistic effect of a novel photocatalyst based on triazine with 2-aminoanthraquinone for the Beckmann rearrangement in batch and a simple hand-made continuous flow photocatalytic reactor†","authors":"Mona Hosseini-Sarvari and Mohammad Namjoo","doi":"10.1039/D4RE00612G","DOIUrl":"https://doi.org/10.1039/D4RE00612G","url":null,"abstract":"The Beckmann rearrangement is a fundamental organic transformation that plays an indispensable role in the synthesis of various functionalized compounds. In recent years, the development of efficient and selective catalysts for this reaction has garnered significant attention. In this study, we investigate the synergetic effect of a novel triazine-based photocatalyst in combination with 2-aminoanthraquinone in the Beckmann rearrangement under visible light irradiation. The triazine-based photocatalyst by incorporating 2-aminoanthraquinone, with its unique structural properties and high photocatalytic activity, offers promising potential for enhancing the efficiency and selectivity of the Beckmann rearrangement. Furthermore, we provide insights into a simple, handmade, continuous-flow photocatalytic reactor system that allows us to perform large-scale Beckmann rearrangement in a shorter time with reasonable efficiency. Overall, this study highlights the synergetic effect of a novel triazine-based photocatalyst with 2-aminoanthraquinone in the Beckmann rearrangement, offering new avenues for synthesizing functionalized compounds with improved efficiency and selectivity.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1386-1398"},"PeriodicalIF":3.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of organic linker substituents on properties of metal–organic frameworks: a review† 有机连接取代基对金属-有机骨架性能的影响

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2025-03-11 DOI: 10.1039/D4RE00570H

Viktoriia V. Torbina, Yulia A. Belik and Olga V. Vodyankina

{"title":"Effect of organic linker substituents on properties of metal–organic frameworks: a review†","authors":"Viktoriia V. Torbina, Yulia A. Belik and Olga V. Vodyankina","doi":"10.1039/D4RE00570H","DOIUrl":"https://doi.org/10.1039/D4RE00570H","url":null,"abstract":"Tuning the properties of solid materials through the directed change of their composition is the most desirable tool for researchers. Varying the electronic structure of metal–organic frameworks by introducing different functional groups into the organic linker is usually regarded as the “Holy Grail” of the synthesis of porous materials with given properties. However, despite having more obvious structure–property relationships in comparison with inorganic porous materials, the chemistry of metal–organic frameworks is more complex, and the presence of a substituent can affect not only the electronic properties but also the structure, stability, numbers of defect sites and coordinatively unsaturated atoms, formation of new adsorption sites, etc. All these changes can influence the field of application of the designed/prepared materials. In the present review, the effect of the substituent nature on a broad range of metal–organic framework characteristics is discussed. The benefits and drawbacks of functionalizing organic linkers in metal–organic frameworks for gas storage and separation as well as catalysis and photocatalysis are also considered.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 6","pages":" 1197-1215"},"PeriodicalIF":3.4,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144148234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0