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Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1416-4

Abstract:

• Solvent-free chitosan oxidation is obtained by rapid mechanochemical

Keywords： Chitosan     High energy ball milling     Mechanochemistry     Oxidation    

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Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective catalytic oxidation of cyclohexane

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8,   Pages 1211-1223 doi: 10.1007/s11705-022-2145-3

Abstract: The one-step highly selective oxidation of cyclohexane into cyclohexanone and cyclohexanol as the essential intermediates of nylon-6 and nylon-66 is considerably challenging. Therefore, an efficient and low-cost catalyst must be urgently developed to improve the efficiency of this process. In this study, a Co3O4–CeO2 composite oxide catalyst was successfully prepared through ultrasound-assisted co-precipitation. This catalyst exhibited a higher selectivity to KA-oil, which was benefited from the synergistic effects between Co3+/Co2+ and Ce4+/Ce3+ redox pairs, than bulk CeO2 and/or Co3O4. Under the optimum reaction conditions, 89.6% selectivity to KA-oil with a cyclohexane conversion of 5.8% was achieved over Co3O4–CeO2. Its catalytic performance remained unchanged after five runs. Using the synergistic effects between the redox pairs of different transition metals, this study provides a feasible strategy to design high-performance catalysts for the selective oxidation of alkanes.

Keywords： composite oxides     cyclohexanone     cyclohexanol     ultrasonic-assisted co-precipitation     selective oxidation     solvent-free    

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Implementing An “Impracticable” Copolymerization to Fabricate A Desired Polymer Precursor for N-doped Porous Carbons Article

Shi-Chao Qi, Xiao-Jie Lu, Yin-Cong Lou, Rui Zhou, Ding-Ming Xue, Xiao-Qin Liu, Lin-Bing Sun

Engineering 2022, Volume 16, Issue 9,   Pages 154-161 doi: 10.1016/j.eng.2021.07.031

Abstract: Considerable efforts have been made but wasted in searching for unknown reaction conditions in solventtris(chloromethyl)-2,4,6-trimethylbenzene and melamine was confirmed to be impracticable under various solventconditions; however, it was successfully implemented using a solvent-free method.monomer molecules in the solid phase, were demonstrated to make the copolymerization successful in the solvent-free

Keywords： Solvent-free method     Solvent effect     Copolymerization     N-doped porous carbon    

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Expression and characterization of a CALB-type lipase from

Jiang-Wei Shen, Xue Cai, Bao-Juan Dou, Feng-Yu Qi, Xiao-Jian Zhang, Zhi-Qiang Liu, Yu-Guo Zheng

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 868-879 doi: 10.1007/s11705-019-1889-x

Abstract: was covalently immobilized and successfully used for ethyl hexanoate synthesis in cyclohexane or in a solvent-free

Keywords： lipase     Sporisorium reilianum     biochemical characterization     short-chain flavor ester     solvent-free system    

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Regulation of radicals by hydrogen-donor solvent in direct coal liquefaction

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1689-1699 doi: 10.1007/s11705-022-2186-7

Abstract: The synergistic mechanism of hydrogen supply and hydrogenolysis of hydrogen-donor solvent was proposed

Keywords： direct coal liquefaction     hydrogen-donor solvent     induced pyrolysis     radical mechanism     density functional    

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Micronization of curcumin with biodegradable polymer by supercritical anti-solvent using micro swirl

Kimthet Chhouk, Wahyudiono, Hideki Kanda, Shin-Ichro Kawasaki, Motonobu Goto

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 184-193 doi: 10.1007/s11705-017-1678-3

Abstract: employed to produce the micronized curcumin with polyvinylpyrrolidone (PVP) by the supercritical anti-solvent

Keywords： micronization     curcumin     polyvinylpyrrolidone     supercritical anti-solvent     swirl mixer    

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Study of an artificial boundary condition based on the damping-solvent extraction method

Qiang XU, Jianyun CHEN, Jing LI, Mingming WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 281-287 doi: 10.1007/s11709-012-0167-5

Abstract: The boundary condition was based on the damping-solvent extraction method.The principle of the damping-solvent extraction method was described.Compared with the damping-solvent extraction method, this boundary condition is easier to be applied

Keywords： damping-solvent extraction method     structure-unlimited-foundation system     spring-damper system     artificial    

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Deep eutectic solvent inclusions for high- composite dielectric elastomers

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 996-1002 doi: 10.1007/s11705-022-2138-2

Abstract: developed a novel strategy for improving the dielectric constant of polymeric elastomers via deep eutectic solvent

Keywords： composite materials     deep eutectic solvent     dielectric elastomer     high dielectric constant    

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A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid

Tingting MA, Ying TENG, Peter CHRISTIE, Yongming LUO, Yongshan CHEN, Mao YE, Yujuan HUANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 31-42 doi: 10.1007/s11783-012-0463-2

Abstract: optimized procedure based on gas chromatography-mass spectrometry (GC-MS) combined with accelerated solvent

Keywords： phthalic acid esters     quality assurance and quality control     soil type     accelerated solvent extraction     certified    

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Purification of artemisinin from quercetin by anti-solvent crystallization

Chandrakant R. MALWADE, Haiyan QU, Ben-Guang RONG, Lars P. CHRISTENSEN

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 72-78 doi: 10.1007/s11705-013-1305-x

Abstract: In the present work, anti-solvent crystallization of artemisinin from four different organic solventsWater was used as anti-solvent.The effect of an impurity (quercetin) on the performance of anti-solvent crystallization of artemisininAnti-solvent crystallization experiments were designed based on the fundamental process data determinedFirstly, the anti-solvent crystallization of artemisinin without impurity was performed from all four

Keywords： anti-solvent crystallization     artemisinin     quercetin     solubility     Artemisia annua    

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Review of solvent based carbon-dioxide capture technologies

Kathryn A. MUMFORD,Yue WU,Kathryn H. SMITH,Geoffrey W. STEVENS

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 2,   Pages 125-141 doi: 10.1007/s11705-015-1514-6

Abstract: This review provides an update on the status of large scale integrated CCS technologies using solventrate, CO capture capacity, thereby reducing equipment size and decreasing the energy required for solvent

Keywords： large scale     carbon dioxide     carbon capture     solvent absorption    

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Vanadium(IV) solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 56-67 doi: 10.1007/s11705-022-2185-8

Abstract: Separation of vanadium from black shale leaching solution at low pH is very meaningful, which can effectively avoid the generation of alkali neutralization slag and the resulting vanadium loss. In this study, coordination mechanism of vanadium in acid leaching solution at low pH was investigated with the intervention of chloride ions. Under the conditions of pH 0.8, di-(2-ethylhexyl)phosphoric acid concentration of 20%, phase ratio of 1:2, and extraction time of 8 min, the vanadium extraction could reach 80.00%. The Fourier transform infrared and electrospray ionization results reveal that, despite the fact that the chloride ion in the leachate could significantly promote vanadium extraction, the chloride ion does not enter the organic phase, indicating an intriguing phenomenon. Among Cl−–V, SO42−–V, and H2O–V, the V–Cl bond is longer and the potential difference between coordinate ions and vanadium is smaller. Therefore, VO2+ gets easily desorbed with chloride ions and enter the organic phase. At the same time, the hydrogen ions of di-(2-ethylhexyl)phosphoric acid also enter the water phase more easily, which reduces the pH required for the extraction reaction.

Keywords： vanadium     black shale     solvent extraction     high acidity extraction    

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Solvent-resistant porous membranes using poly(ether−ether ketone): preparation and application

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1536-1559 doi: 10.1007/s11705-022-2221-8

Abstract: fabricate PEEK-based membranes are illustrated concretely, including conventional thermal-induced and non-solvent-induced

Keywords： PEEK     phase inversion     solvent-resistant membrane     nanofiltration     membrane contactor    

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Nucleation and growth mechanism of cefodizime sodium at different solvent compositions

Xinwei ZHANG, Shudong ZHANG, Xiaodan SUN, Zequn YIN, Quanjie LIU, Xiwen ZHANG, Qiuxiang YIN

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 4,   Pages 490-495 doi: 10.1007/s11705-013-1350-5

Abstract: The induction time of cefodizime sodium was measured in ethanol-water at different solvent compositionsThe results indicate that the solvent composition played an important role in the supersaturation and

Keywords： cefodizime sodium     induction time     primary nucleation     growth mechanism    

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Extraction of hydrogen chloride by a coupled reaction-solvent extraction process

Yunzhao Li,Xingfu Song,Guilan Chen,Shuying Sun,Yanxia Xu,Jianguo Yu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4,   Pages 479-487 doi: 10.1007/s11705-015-1512-8

Abstract: A coupled reaction-solvent extraction process was used to remove HCl from a simulated distiller waste

Keywords： hydrogen chloride     distiller waste     coupled reaction and solvent extraction     N235     extraction mechanism    

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Title Author Date Type Operation

Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan

Journal Article

Ultrasound-assisted co-precipitation synthesis of mesoporous Co3O4–CeO2 composite oxides for highly selective catalytic oxidation of cyclohexane

Journal Article

Implementing An “Impracticable” Copolymerization to Fabricate A Desired Polymer Precursor for N-doped Porous Carbons

Shi-Chao Qi, Xiao-Jie Lu, Yin-Cong Lou, Rui Zhou, Ding-Ming Xue, Xiao-Qin Liu, Lin-Bing Sun

Journal Article

Expression and characterization of a CALB-type lipase from

Jiang-Wei Shen, Xue Cai, Bao-Juan Dou, Feng-Yu Qi, Xiao-Jian Zhang, Zhi-Qiang Liu, Yu-Guo Zheng

Journal Article

Regulation of radicals by hydrogen-donor solvent in direct coal liquefaction

Journal Article

Micronization of curcumin with biodegradable polymer by supercritical anti-solvent using micro swirl

Kimthet Chhouk, Wahyudiono, Hideki Kanda, Shin-Ichro Kawasaki, Motonobu Goto

Journal Article

Study of an artificial boundary condition based on the damping-solvent extraction method

Qiang XU, Jianyun CHEN, Jing LI, Mingming WANG

Journal Article

Deep eutectic solvent inclusions for high- composite dielectric elastomers

Journal Article

A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid

Tingting MA, Ying TENG, Peter CHRISTIE, Yongming LUO, Yongshan CHEN, Mao YE, Yujuan HUANG

Journal Article

Purification of artemisinin from quercetin by anti-solvent crystallization

Chandrakant R. MALWADE, Haiyan QU, Ben-Guang RONG, Lars P. CHRISTENSEN

Journal Article

Review of solvent based carbon-dioxide capture technologies

Kathryn A. MUMFORD,Yue WU,Kathryn H. SMITH,Geoffrey W. STEVENS

Journal Article

Vanadium(IV) solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with

Journal Article

Solvent-resistant porous membranes using poly(ether−ether ketone): preparation and application

Journal Article

Nucleation and growth mechanism of cefodizime sodium at different solvent compositions

Xinwei ZHANG, Shudong ZHANG, Xiaodan SUN, Zequn YIN, Quanjie LIU, Xiwen ZHANG, Qiuxiang YIN

Journal Article

Extraction of hydrogen chloride by a coupled reaction-solvent extraction process

Yunzhao Li,Xingfu Song,Guilan Chen,Shuying Sun,Yanxia Xu,Jianguo Yu

Journal Article