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Study of ultrasound-promoted, lipase-catalyzed synthesis of fructose ester

Kai ZHU, Hui LIU, Pingfang HAN, Ping WEI,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 367-371 doi: 10.1007/s11705-009-0312-4

Abstract: Here we describe the experimental study of the effect of ultrasounds of different intensity on the lipase-catalyzedimportant role in our lipase-catalyzed reaction.It decreased reaction time as compared to a reaction without ultrasound that resulted in the same yield, increased reaction rate, and enhanced the amount of fructose ester produced.was favorable for the reaction.
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Lipase-Catalyzed Synthesis of Sn-2 Palmitate: A Review Review

Wei Wei, Cong Sun, Xiaosan Wang, Qingzhe Jin, Xuebing Xu, Casimir C. Akoh, Xingguo Wang

Engineering 2020, Volume 6, Issue 4,   Pages 406-414 doi: 10.1016/j.eng.2020.02.008

Abstract: In this review, the development of the lipase-catalyzed synthesis of sn-2 palmitate over thelast 25 years are summarized, with a focus on reaction schemes in a laboratory setting.Prospects for the lipase-catalyzed synthesis of sn-2 palmitate are discussed.

Keywords： Structured triacylglycerols，Palmitic acid，Human milk fat substitutes，Lipase-catalyzed reaction，Sn<    

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Regioselective acylation of pyridoxine catalyzed by immobilized lipase in ionic liquid

BAI Shu, REN Mengyuan, WANG Lele, SUN Yan

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 301-307 doi: 10.1007/s11705-008-0060-x

Abstract: The regioselective acylation of pyridoxine catalyzed by immobilized lipase () in 1-butyl-3-methylimidazoliumAmong the tested parameters, water activity () and temperature have profound effects on the reactionFor the reaction in [BMIM]PF, higher temperature (50°C–55°C) and lower (<0.01) are preferable conditionsa different rate-temperature profile and a lower velocity at lower temperature in [BMIM]PF-mediated reactionMoreover, consecutive batch reactions for enzyme reuse also show that lipase exhibited a much higher

Keywords： ACN     stability     1-butyl-3-methylimidazolium hexafluorophosphate     different rate-temperature     alternative    

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Continuous reaction performances of benzene alkylation with long chain olefins catalyzed by ionic liquid

QIAO Congzhen, LI Chengyue

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 1,   Pages 69-73 doi: 10.1007/s11705-008-0014-3

Abstract: Based on a compulsive mixing-reacting-separating-recycling small experimental setup,the continuous reactionperformances of benzene alkylation with long chain olefins catalyzed by [BMIM]Cl-AlCl ionic liquid wereEven under the relatively hypecritical reaction conditions, the single pass conversion of pure 1-dodecene

Keywords： stability     different     hypecritical     compulsive mixing-reacting-separating-recycling     non-benzene    

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One-pot three-component Mannich reaction catalyzed by sucrose char sulfonic acid

Qiong XU, Zhigao YANG, Dulin YIN, Jihui WANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 201-205 doi: 10.1007/s11705-009-0052-5

Abstract: Sucrose char sulfonic acid efficiently catalyzed the one-pot three-component Mannich reaction of ketonesThis reaction can be performed under mild reaction conditions with clean reaction profiles and a simple

Keywords： One–pot synthesis     b-amino ketone     char sulfonic acid     2-acetylpyrazine     catalysis    

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Octane compositions in sulfuric acid catalyzed isobutane/butene alkylation products: experimental and

Lina Liang, Youzhi Liu, Weizhou Jiao, Qiaoling Zhang, Chao Zhang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1229-1242 doi: 10.1007/s11705-020-2030-x

Abstract: a classic carbenium ion mechanism, the carbocation transition states in concentrated sulfuric acid catalyzed

Keywords： sulfuric acid catalyzed alkylation     carbocation reaction     transition state     octane compositions    

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Silver-catalyzed bioleaching for raw low-grade copper sulphide ores

Tianlong DENG, Yafei GUO, Mengxia LIAO, Dongchan LI

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3,   Pages 250-254 doi: 10.1007/s11705-009-0049-0

Abstract: This research was conducted to investigate the biooxidation and copper dissolution from raw low-grade refractory copper sulphide ores located in the Xinjiang Autonomous Region of China using adapted bacteria. In order to accelerate the bioleaching rate, the adapted mixed bacteria and silver ion catalyst were tested in the leach columns at laboratory scale. The overall acid consumption was 4.3 kg sulphuric acid per kg of dissolved copper and was linearly related to the percent copper dissolution. The calculated copper dissolution rates obey the Shrinking Core Model. The relative activation energy of the whole biooxidative leaching stages was calculated to be 48.58 kJ/mol.

Keywords： green process     biohydrometallurgy     bioleaching     reaction kinetics     sulphide ores    

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Stability analysis of alkaline nitrobenzene-containing wastewater by a catalyzed Fe-Cu treatment process

FAN Jinhong, XU Wenying, GAO Tingyao, MA Luming

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 504-508 doi: 10.1007/s11783-007-0081-6

Abstract: Iron and copper bimetallic system (catalyzed Fe-Cu process) is a promising technology for alkaline nitrobenzene-containing

Keywords： technology     bimetallic     catalyzed     nitrobenzene-containing wastewater     efficiency    

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Alkylation of benzene with propylene catalyzed by FeCl3-chloropyridine ionic liquid

SUN Xuewen, ZHAO Suoqi, LI Hui

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 292-295 doi: 10.1007/s11705-007-0053-1

Abstract: Significant improvements in propylene conversion and cumene selectivity under mild reaction conditionsIf reaction is carried out in following two stages, the result will be very good.At the initial stage of the reaction, alkylation is the main reaction and a higher conversion of propyleneAt the later stage of the reaction, transalkylation is the main reaction and selectivity to cumene canbe increased by appropriately raising the reaction temperature.
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Changes in Lipoprotein Lipase in the Heart Following Diabetes Onset Review

Chae Syng Lee, Yajie Zhai, Brian Rodrigues

Engineering 2023, Volume 20, Issue 1,   Pages 19-25 doi: 10.1016/j.eng.2022.06.013

Abstract: making this substrate and attains its FAs from multiple sources, including the action of lipoprotein lipase

Keywords： Cardiac metabolism     Lipoprotein lipase     Heparanase     Vascular endothelial growth factor     Diabetic cardiomyopathy    

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Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative coupling

Yun Liu, Youquan Zhu, Chaojun Li

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 3-8 doi: 10.1007/s11705-017-1693-4

Abstract: A mild and efficient synthesis for the biaryl acids via rhodium-catalyzed cross-dehydrogenative couplingreaction has been developed.This novel protocol with sodium chlorite as an oxidant featured many advantages such as mild reaction

Keywords： biaryl acids     cross-dehydrogenative coupling     rhodium-catalyzed    

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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: A lipase from SRZ2 (SRL) with 73% amino acid sequence identity to lipase B (CALB) was cloned andThis study indicated that a CALB-type lipase from SRZ2 showed great potential in organic ester synthesis

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

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Chemical reactions of oily sludge catalyzed by iron oxide under supercritical water gasification condition

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 886-896 doi: 10.1007/s11705-021-2125-z

Abstract: Supercritical water gasification is a promising technology in dealing with the degradation of hazardous waste, such as oily sludge, accompanied by the production of fuel gases. To evaluate the mechanism of Fe2O3 catalyst and the migration pathways of heteroatoms and to investigate the systems during the process, reactive force field molecular dynamics simulations are adopted. In terms of the catalytic mechanisms of Fe2O3, the surface lattice oxygen is consumed by small carbon fragments to produce CO and CO2, improving the catalytic performance of the cluster due to more unsaturated coordination Fe sites exposed. Lattice oxygen combines with •H radicals to form water molecules, improving the catalytic performance. Furthermore, the pathway of asphaltene degradation was revealed at an atomic level, as well as products. Moreover, the adsorption of hydroxyl radical on the S atom caused breakage of the two C–S bonds in turn, forming •HSO intermediate, so that the organic S element was fixed into the inorganic liquid phase. The heteroatom O was removed under the effects of supercritical water. Heavy metal particles presented in the oily sludge, such as iron in association with Fe2O3 catalyst, helped accelerate the degradation of asphaltenes.

Keywords： oily sludge     SCWG     ReaxFF     Fe2O3     heteroatoms    

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Benzene alkylation with long chain olefins catalyzed by ionic liquids: a review

QIAO Congzhen, CAI Yonghong, GUO Quanhui

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 346-352 doi: 10.1007/s11705-008-0045-9

Abstract: The introduction of ionic liquids to alkylation process gives a choice for “green production” in the petrochemical and detergent industry. A lot of papers and patents have been published using chloroaluminate ionic liquid as a novel catalyst for alkylation with high reactivity and easy separation from reactants. These included the acidity, characterization, determination and catalysis technologies in batch and continuous operation mode for different scales. According to published data and several results of pilot alkylation,including the authors’ experience,the prospect of chloroaluminate ionic liquids for commercials was also discussed. It has been pointed out that there still are many difficulties and challenges to be overcome for commercial application of the ionic liquid catalyst.

Keywords： different     petrochemical     characterization     introduction     chloroaluminate    

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Asymmetric transfer hydrogenation of prochiral ketone catalyzed over Fe-CS/SBA-15 catalyst

XUE Ping, WU Tao

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 251-255 doi: 10.1007/s11705-007-0045-1

Abstract: Effects of Fe content in catalyst, reaction temperature, reaction time and promoter KOH concentrationUnder optimal reaction conditions: KOH concentration 0.03 mol/L, reaction temperature 70ºC and reactionUnder the above KOH concentration and reaction temperature and reaction time of 8 h, the ee of ()-4-methyl

Keywords： asymmetric transfer     enantioselectivity     Fe-CS/SBA-15     aliphatic     aromatic    

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Title Author Date Type Operation

Study of ultrasound-promoted, lipase-catalyzed synthesis of fructose ester

Kai ZHU, Hui LIU, Pingfang HAN, Ping WEI,

Journal Article

Lipase-Catalyzed Synthesis of Sn-2 Palmitate: A Review

Wei Wei, Cong Sun, Xiaosan Wang, Qingzhe Jin, Xuebing Xu, Casimir C. Akoh, Xingguo Wang

Journal Article

Regioselective acylation of pyridoxine catalyzed by immobilized lipase in ionic liquid

BAI Shu, REN Mengyuan, WANG Lele, SUN Yan

Journal Article

Continuous reaction performances of benzene alkylation with long chain olefins catalyzed by ionic liquid

QIAO Congzhen, LI Chengyue

Journal Article

One-pot three-component Mannich reaction catalyzed by sucrose char sulfonic acid

Qiong XU, Zhigao YANG, Dulin YIN, Jihui WANG

Journal Article

Octane compositions in sulfuric acid catalyzed isobutane/butene alkylation products: experimental and

Lina Liang, Youzhi Liu, Weizhou Jiao, Qiaoling Zhang, Chao Zhang

Journal Article

Silver-catalyzed bioleaching for raw low-grade copper sulphide ores

Tianlong DENG, Yafei GUO, Mengxia LIAO, Dongchan LI

Journal Article

Stability analysis of alkaline nitrobenzene-containing wastewater by a catalyzed Fe-Cu treatment process

FAN Jinhong, XU Wenying, GAO Tingyao, MA Luming

Journal Article

Alkylation of benzene with propylene catalyzed by FeCl3-chloropyridine ionic liquid

SUN Xuewen, ZHAO Suoqi, LI Hui

Journal Article

Changes in Lipoprotein Lipase in the Heart Following Diabetes Onset

Chae Syng Lee, Yajie Zhai, Brian Rodrigues

Journal Article

Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative coupling

Yun Liu, Youquan Zhu, Chaojun Li

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

Chemical reactions of oily sludge catalyzed by iron oxide under supercritical water gasification condition

Journal Article

Benzene alkylation with long chain olefins catalyzed by ionic liquids: a review

QIAO Congzhen, CAI Yonghong, GUO Quanhui

Journal Article

Asymmetric transfer hydrogenation of prochiral ketone catalyzed over Fe-CS/SBA-15 catalyst

XUE Ping, WU Tao

Journal Article