Reaction Chemistry & Engineering最新文献

Ultrasound-assisted condensation cyclization reaction: fast synthesis of quinazolinones from o-aminobenzamides and aldehydes under ambient conditions† 超声辅助缩合环化反应：在环境条件下从邻氨基苯甲酰胺和醛类快速合成喹唑啉酮类化合物†。

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-09 DOI: 10.1039/D4RE00479E

Xuerou Chen, Siqi Li, Shilong Sun and Wuji Sun

引用次数: 0

Metallic sealants increase flux and change selectivity in supported molten-salt membranes.

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-12-03 DOI: 10.1039/d4re00449c

Liam A McNeil, Guannan Chen, Wenting Hu, Evangelos I Papaioannou, Ian S Metcalfe, Greg A Mutch

引用次数: 0

Monitoring and controlling zeolite synthesis via reactor-based solutions: a fed-batch strategy.

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-11-28 DOI: 10.1039/d4re00440j

Amirhossein Javdani, Gleb Ivanushkin, Aron Deneyer, Michiel Dusselier

{"title":"Monitoring and controlling zeolite synthesis via reactor-based solutions: a fed-batch strategy.","authors":"Amirhossein Javdani, Gleb Ivanushkin, Aron Deneyer, Michiel Dusselier","doi":"10.1039/d4re00440j","DOIUrl":"https://doi.org/10.1039/d4re00440j","url":null,"abstract":"Most conventional zeolite synthesis takes place in closed batch autoclaves that cannot be monitored or controlled during the process. Moreover, the study of time-dependent parameters of the synthesis with the conventional \"cooling-opening\" procedure not only reduces accuracy as a series of reactors (never 100% identical) needs to be started in parallel (and stopped at different times), it is also labor intense. Furthermore, the classic batch concept does not permit the intermediate addition of species without disrupting synthesis and the cooling-reheating effects. In this study, we developed a technique for zeolite synthesis monitoring in one-pot experiments using the sampling feature of fed-batch (FB) reactors. These one-pot syntheses can save time and ingredients instead of performing plenty of classic batch experiments. In addition, we could control and manipulate the zeolite synthesis by using the feeding function of the FB reactor and the intermediate addition of precursors at operational temperatures and pressures. Stannosilicate and zincosilicate syntheses were carried out via the FB reactor to investigate the intermediate timed-addition and the possibility of optimizing feeding rates of heteroatoms opposed to a classic synthesis, which faces challenges when a high amount of heteroatom precursor presents at the start. Finally, a modified FB platform was further developed to be able to monitor essential kinetic and synthetic parameters on-line (T, P, and also pH) on-line without intervention. For instance, pH profiles can allow one to estimate key events in zeolite synthesis, but in the art, these profiles are always measured ex situ (including cooling effects etc.).","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11603306/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Acid-functionalized PVA composite membranes for pervaporation-assisted esterification.

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-11-15 DOI: 10.1039/d4re00388h

Julia Piotrowska, Christian Jordan, Kristof Stagel, Marco Annerl, Jakob Willner, Andreas Limbeck, Michael Harasek, Katharina Bica-Schröder

{"title":"Acid-functionalized PVA composite membranes for pervaporation-assisted esterification.","authors":"Julia Piotrowska, Christian Jordan, Kristof Stagel, Marco Annerl, Jakob Willner, Andreas Limbeck, Michael Harasek, Katharina Bica-Schröder","doi":"10.1039/d4re00388h","DOIUrl":"https://doi.org/10.1039/d4re00388h","url":null,"abstract":"Composite flat-sheet membranes functionalized with imidazolium-based ionic liquids (ILs) grafted to poly(vinyl alcohol)/glutaraldehyde as a catalytic layer were developed to enhance the esterification between n-butanol and acetic acid. The functionalized membranes were produced via dip-coating commercial pervaporation membranes, and two distinct Brønsted-acidic ILs with an imidazolium-based cation and different (hydrogen sulfate [HSO4]- or bromide [Br]-) anions were compared. Compact, 12 μm-thick, defect-free catalytic layers were observed on top of the pervaporation membrane supports, and the determined penetration depth of the ILs confirmed their presence in the upper part of the coating. While both ILs could significantly promote the esterification of n-butanol and acetic acid, the [HSO4]- anion catalyzed the formation of butyl acetate more effectively than [Br]--based species, resulting in yields of up to 50% over 15 h. Furthermore, the coated membranes exhibited enhanced water separation factors compared to the unfunctionalized one owing to the reduced swelling of the coated membranes accompanied with their diminished wettability.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11600398/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrating continuous flow reaction and work-up: chiral amine resolution, separation and purification using a novel coalescing filter system.

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-11-13 DOI: 10.1039/d4re00442f

Bethan M Rowley, Lisa A Thompson, Luke A Power, James Daglish, Emma Parks, James Birbeck, Steve Marsden, Nikil Kapur, A John Blacker

{"title":"Integrating continuous flow reaction and work-up: chiral amine resolution, separation and purification using a novel coalescing filter system.","authors":"Bethan M Rowley, Lisa A Thompson, Luke A Power, James Daglish, Emma Parks, James Birbeck, Steve Marsden, Nikil Kapur, A John Blacker","doi":"10.1039/d4re00442f","DOIUrl":"https://doi.org/10.1039/d4re00442f","url":null,"abstract":"To maximize the benefits of a continuous flow reaction, a continuous work-up is also needed. Herein, we present a process design and novel equipment for a continuous amine resolution reaction, integrated with liquid-liquid (L-L) extraction, back-extraction into a different solvent, and crystallisation purification for product isolation. The reaction, in iso-propyl acetate, flows through a heated fixed-bed reactor with solid supported Candida antarctica lipase which catalyses the resolution of (rac)-1-phenylethylamine to give the (R)-amide in 50% conversion and 96% enantiomeric excess (ee). This is separated from the unreacted (S)-amine co-product by mixing with an acidic aqueous stream and separating the phases using our recently reported coalescence filter separator. The aqueous stream is neutralised by mixing with base and back-extracted into methyl-THF solvent before separating the phases using a membrane separator. Finally, a solid amine salt is isolated by filtration, achieved by mixing the free base with an organic acid to cause crystallisation to give the (S)-1-phenylethylamine in 43% yield and >99% ee from racemate. The work illustrates how typical reactions, work-up and purification steps that involve multiple phases can be telescoped together using both new and commercially available laboratory equipment. This continuous system uses mild reaction conditions, green solvents and minimises their use for reduced waste.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11603407/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142764873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Upcycling polymethyl methacrylate to methacrylic acid†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-11-13 DOI: 10.1039/D4RE00341A

Yanfa Zhuang, Nooshin Saadatkhah, Tien-Dat Nguyen, Jacopo De Tommaso, Clive Yi Jie Ng, Chunyu Wang, Abdellah Ajji and Gregory S. Patience

{"title":"Upcycling polymethyl methacrylate to methacrylic acid†","authors":"Yanfa Zhuang, Nooshin Saadatkhah, Tien-Dat Nguyen, Jacopo De Tommaso, Clive Yi Jie Ng, Chunyu Wang, Abdellah Ajji and Gregory S. Patience","doi":"10.1039/D4RE00341A","DOIUrl":"https://doi.org/10.1039/D4RE00341A","url":null,"abstract":"Waste polymethyl methacrylate (PMMA) has become a more prominent contributor to global plastic waste in the aftermath of the COVID-19 pandemic. Recycling PMMA relies either on mechanical recycling or thermal depolymerization. Mechanical properties deteriorate after several mechanical recycling cycles. Depolymerization technologies operate in an inert atmosphere and require costly monomer purification downstream. Therefore, neither chemical nor mechanical recycling of PMMA is economically viable. Here, we demonstrate a sustainable recycling method through catalytic hydrolysis to upcycle PMMA while reaching higher product purity. PMMA reacts over zeolites and produces methacrylic acid instead of methyl methacrylate offering technical, economical, and market benefits. Direct hydrolysis of PMMA over an H-type zeolite with an SiO2/Al2O3 ratio of 80 produced methacrylic acid with a yield of 56% and a selectivity of 58%. Coke formed within the framework of large-pore zeolites, causing reversible deactivation of medium–strong acid sites and Brønsted acid sites. The catalytic decarboxylation of methacrylic acid primarily produces acetone and CO, and six-membered glutaric anhydride forms in solid residues.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 237-250"},"PeriodicalIF":3.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844656","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

Synthesis of ethylphenols and xanthenes via reaction of calcium carbide and phenol: experimental and theoretical studies†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-11-08 DOI: 10.1039/D4RE00397G

Xin Liu, Yuxin Yan, Zhenyu Liu and Qingya Liu

{"title":"Synthesis of ethylphenols and xanthenes via reaction of calcium carbide and phenol: experimental and theoretical studies†","authors":"Xin Liu, Yuxin Yan, Zhenyu Liu and Qingya Liu","doi":"10.1039/D4RE00397G","DOIUrl":"https://doi.org/10.1039/D4RE00397G","url":null,"abstract":"Calcium carbide (CaC2) is a platform chemical for various organic synthesis, and monomeric phenol (PhOH) is expected to be produced via biomass conversion in the near future. This work explores their downstream product during reaction at 300–400 °C without additional solvent and catalyst. The reaction matrix was investigated by density functional theory (DFT) calculation and characterization of the solid product. Results indicate that in addition to ethylphenols, xanthenes are unexpectedly formed with a yield of 26.0% at 350 °C. DFT calculation indicates that PhOH is firstly alkylated by CaC2 to form vinylphenol or dehydrated intermolecularly to form diphenyl ether. Xanthenes are then formed through two pathways: dehydration of vinylphenol with PhOH and then cyclization; alkylation and cyclization of diphenyl ether with CaC2-derived acetylene. Ethylphenols are formed through hydrogenation of vinylphenol where PhOH provides hydrogen. Vinylphenol hydrogenation for ethylphenols exhibits a competitive advantage over vinylphenol dehydration for xanthenes. X-ray diffraction (XRD) of the solid product indicates that CaC2 is converted to calcium phenoxide. Isomolecular electrostatic potential maps suggest that calcium phenoxide exerts a catalytic effect on the alkylation and dehydration reactions. This work provides a novel protocol for xanthene synthesis and an in situ efficient utilization method of the acetenyl group.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 191-202"},"PeriodicalIF":3.4,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844651","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

Nickel foam supported biochar doped Ni–Mo bimetallic oxide for supercapacitor application†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-31 DOI: 10.1039/D4RE00471J

Zhongxin Jin, Kaijia Hu, Feng Lin, Siqi Liu, Ruining Gu, Wei Zhang, Siyu Liu, Caiying Li, Hongyang Liao, Xinping Cai, Haijun Pang, Chunjing Zhang and Huiyuan Ma

{"title":"Nickel foam supported biochar doped Ni–Mo bimetallic oxide for supercapacitor application†","authors":"Zhongxin Jin, Kaijia Hu, Feng Lin, Siqi Liu, Ruining Gu, Wei Zhang, Siyu Liu, Caiying Li, Hongyang Liao, Xinping Cai, Haijun Pang, Chunjing Zhang and Huiyuan Ma","doi":"10.1039/D4RE00471J","DOIUrl":"https://doi.org/10.1039/D4RE00471J","url":null,"abstract":"As novel energy storage devices that have garnered significant attention, supercapacitors offer merits including long cycle life, high power density, ease of fabrication, and rapid charge/discharge rates. The core component of supercapacitors is an electrode material. Carbon materials are the most widely used in supercapacitors. However, their intrinsic charge storage mechanism results in relatively low capacitance performance, which falls short of the requirements for high-performance electrode materials. In this study, rice husks were converted into biochar. The porous biochar produced exhibits characteristics such as a well-developed porous structure, high specific surface area, tunable architecture, and low cost. Polyoxometalates exhibit excellent redox properties and high stability, offering advantages such as acting as electron reservoirs or electron sponges. C-MoO3-NiO2/NF was synthesized on nickel foam (NF) by using polyoxometalate (NH4)4[Ni(II)Mo6O24H6]·5H2O as a precursor, doping with rice husk biochar and utilizing KOH for porosity development. The supercapacitor test results indicate that the C-MoO3-NiO2/NF electrode material exhibits a charge–discharge time reaching 374.4 s and a specific capacitance of 180.77 F g−1 at a current density of 1 A g−1 in 6 mol L−1 KOH solution. After 1000 cycles of charge–discharge testing, the capacitance retention rate was still 75%. This indicates that the electrode material is an excellent supercapacitor material, laying a foundation for the development of novel supercapacitor materials.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 224-236"},"PeriodicalIF":3.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844655","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

Removal of gaseous Hg0 by Cl-loaded carbonaceous material prepared from rice husk 用稻壳制备的含氯碳质材料去除气态 Hg0

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-31 DOI: 10.1039/D4RE00414K

Naoto Tsubouchi, Momone Yoshizawa, Javzandogole Bud and Yuuki Mochizuki

{"title":"Removal of gaseous Hg0 by Cl-loaded carbonaceous material prepared from rice husk","authors":"Naoto Tsubouchi, Momone Yoshizawa, Javzandogole Bud and Yuuki Mochizuki","doi":"10.1039/D4RE00414K","DOIUrl":"https://doi.org/10.1039/D4RE00414K","url":null,"abstract":"The main objective of this study was to investigate the removal of gaseous Hg0 from the residue obtained during the chlorination of rice husk char to recover silica. First, the chlorine content, chlorine form, pore size, and chlorination reaction of the chlorination residue of rice husk char were investigated. Subsequently, the adsorption performance of gaseous Hg0 and adsorption form of Hg0 were examined. Through the chlorination of rice husk char (RC) at 1000 °C for 10 min, silicon (Si) in the char could be separated and recovered, and carbonaceous material doped with 9.0% Cl could be prepared. The temperature-programmed desorption (TPD) analysis of the char before and after chlorination revealed that the oxygen-containing functional groups on the surface of char were part of the Cl adsorption sites. Additionally, the X-ray photoelectron spectroscopy (XPS) analysis showed that Cl was mainly present in the C–Cl bonds of the chlorination residue (RCC). The effect of temperature on the performance was small in the tested range (40–160 °C). The adsorption performance of the prepared RCC was superior to those of chlorine- and sulfur-loaded carbons, as reported in previous studies. The results of TPD analysis after the adsorption tests indicated that the adsorption form of Hg0 was mainly HgCl2.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 158-167"},"PeriodicalIF":3.4,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844639","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

Sugar additive with a halogen group enabling a highly reversible and dendrite-free Zn anode†

IF 3.4 3区化学

Reaction Chemistry & Engineering Pub Date : 2024-10-29 DOI: 10.1039/D4RE00366G

Weihao Xu, Xipo Ma, Pengbo Lyu, Zhenren Gao, Chunshuang Yan and Chade Lv

{"title":"Sugar additive with a halogen group enabling a highly reversible and dendrite-free Zn anode†","authors":"Weihao Xu, Xipo Ma, Pengbo Lyu, Zhenren Gao, Chunshuang Yan and Chade Lv","doi":"10.1039/D4RE00366G","DOIUrl":"https://doi.org/10.1039/D4RE00366G","url":null,"abstract":"Aqueous zinc-ion batteries (AZBs) suffer from poor reversibility and limited lifespan due to parasitic side reactions and dendrite growth induced by active water. Although additives are widely used to address these issues by reducing the water content within the Zn-ion solvation sheaths, the strong interaction between the additives and Zn2+ causes poor de-solvation kinetics. Here, we propose a strategy that introduces an electron-withdrawing halogen group to reduce the polarity of the sugar additive. Theoretical simulations and experimental results demonstrate that a sucralose additive with optimal polarity can decrease the coordinated active water without hindering the de-solvation kinetics of Zn2+. This effectively regulates the overpotential and inhibits side reactions. Meanwhile, the additive can adsorb onto the surface of the Zn metal to modify the direction of zinc deposition and suppress dendrite growth. As a result, the Zn//Zn symmetric cell with the sucralose electrolyte additive exhibits an outstanding cycling life of 2400 h at a current density of 1 mA cm−2. Moreover, when coupled with the V2O5 cathode, the full battery also demonstrates excellent operational stability, achieving 4000 cycles with a retained capacity of 51.84%.","PeriodicalId":101,"journal":{"name":"Reaction Chemistry & Engineering","volume":" 1","pages":" 214-223"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844653","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