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中国生物工程学会2014年学术年会暨全国生物技术大会

作者： Yun Li Benkun Qi Yinhua Wan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of Sciences University of Chinese Academy of Sciences

Researches on bioconversion of lignocellulosic materials for biofuel production have attracted great attention all over the world due to both the abundance of cheap and renewable cellulosic biomass and the consumption of nonrenewable fossil fuels. However, the current bioconversion process is still not commercially viable and cost-competitive in great part due to the recalcitrance of cellulosic biomass. It has been believed that the presence of lignin in lignocelluloses contributes greatly to the recalcitrance. On one hand, with tight association with cellulose and hemicellulose, lignin acts as a barrier to prevent the access of cellulolytic enzymes to the substrate;on the other hand, lignin unproductively absorbs cellulase, decreasing the amount of available cellulase for hydrolyzing. In order to reduce the recalcitrance of lignocellulosic biomass, biomass-disrupting pretreatment is required prior to enzymatic hydrolysis. Most of the prevalent pretreatments, however, are performed under severe conditions, resulting in formation of phenolic compounds from degradation of lignin. These phenolic compounds identified in lignocellulosic hydrolyzates include simple phenolics(vanillin, ferulic acid, syringaldehyde and conifer alcohol, etc.) and oligomeric phenolics(ellagia acid, epicatechin and tannic acid, etc.). The amount and type of phenolic compounds depend on the biomass source, pretreatment methods and conditions. The inhibition of lignin-derived phenols on fermentative strains has been widely investigated, whereas few reports are available on their inhibition on cellulose hydrolysis. Kim et al.(2013) investigated the effect of soluble inhibitors on cellulase and found that phenolic compounds and xylo-oligosaccharides were the most important causes leading to the decrease in cellulase activity. Ximenes et al.(2011;2010) confirmed that vanillin, syringaldehyde, trans-cinnamic acid and hydroxybenzoic acid inhibited cellulose hydrolysis in wet cake. What's more, their

关键词： vanillin cellulase inhibition kinetics HCH-1 model inhibitory group

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A facile two-step pretreatment method for delignification of cornstalk by combining choline hydroxide and 1-ethyl-3-methylimidazolium dimethylphosphate

A facile two-step pretreatment method for delignification of...

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第十七届全国化学热力学和热分析学术会议

作者： Junli Xu Xingmei Lu Suojiang Zhang Beijing Key Laboratory of Ionic Liquids Clean Process Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences College of Chemistry and Chemical Engineering Graduate University of Chinese Academy of Sciences

Ionic liquids are recognized as solvents with great potential for cellulose dissolution and biomass pretreatment.1, 2 The aim of this work was to develop efficient cornstalk pretreatment methods with low energy cost. An effectively two-step method combining choline hydroxide(ChOH) and 1-ethyl-3-methylimidazolium dimethyl phosphate([Emim][DMP]) was developed for delignification of cornstalk under mild conditions. In this two-step method, cornstalk sample was first soaked in ChOH aqueous solution for 3 hours, and then the residue was dissolved completely by [Emim][DMP] in 10 minutes. As compared to cornstalk sample, most lignin was removed and cellulose content was greatly increased in the regenerated cellulose rich material(CRM), which was obtained from [Emim][DMP] solution by adding anti-solvent. Meanwhile, the CRM was converted into HMF with a high yield of 87.21 %. This two-step method enhanced the cornstalk pretreatment by increasing the dissolution of cornstalk and shortening the dissolving time at high pretreated temperature, which indicated that the two-step method for cornstalk was effective and eco-friendly.

关键词： Cornstalk Two-step method Pretreatment Ionic liquids

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Study on Vulcanization of Low-grade Nickel Oxide Ore by Sulfate Reducing Bacteria

Study on Vulcanization of Low-grade Nickel Oxide Ore by Sulf...

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The 6th International Conference on Hydrometallurgy(第六届国际湿法冶金会议)

作者： Junya Cao Xiao Qing He Yuanyuan Li Guangji Zhang Chao Yang School of Chemical & Environmental Engineering China University of Mining & TechnologyBeijing100083China National Key Laboratory of Biochemical Engineering Key Laboratory of Green Process and EngineeringInstitute of Processing EngineeringChinese Academy of SciencesBeijing100190China School of Chemical & Environmental EngineeringChina University of Mining & TechnologyBeijing100083China National Key Laboratory of Biochemical EngineeringKey Laboratory of Green Process and EngineeringInstitute of Processing EngineeringChinese Academy of SciencesBeijing100190China

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中国化学会第十届全国天然有机化学学术会议

作者： Ru-Ming Liu Ying-Bo Li Jian-Hui Xiao Jian-Jiang Zhong Key Laboratory of Cell Engineering of Guizhou Province Affiliated Hospital of Zunyi Medical University Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences State Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology Shanghai Jiao Tong University

Ganoderic acids（GAs）produced by Ganoderma lucidum have been received great attention due to their multiple charming *** this study,four structurally related GAs,i.e.,GA-T,GA-Mk,and two deacetylated derivatives of GA-T,3α,15α-biacetoxy-22-hydroxy-5α-lanosta-7,9（11）,24-trien-26-oic acid（GA-T1）and 3α-acetoxy-15α,22-bihydroxy-5α-lanosta-7,9（11）,24-trien-26-oic acid（GA-T2）,were used to investigate the mechanism of react oxygen species

关键词： apoptosis ROS Structurally related ganoderic acids induce reactive oxygen species-mediated apoptosis on human cervical cancer HeLa cells

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Fluidized roasting reduction kinetics of low-grade pyrolusite coupling with pretreatment of stone coal

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International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 221-227页

作者： Ya-li Feng Zhen-lei Cai Hao-ran Li Zhu-wei Du Xin-wei Liu School of Civil and Environmental Engineering University of Science and Technology Beijing State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences

Based on the fluidized roasting reduction technology of low-grade pyrolusite coupling with pretreatment of stone coal, the manganese reduction efficiency was investigated and technical conditions were optimized. It is found that the optimum manganese reduction efficiency can be up to 98.97% under the conditions that the mass ratio of stone coal to pyrolusite is 3：1, the roasting temperature of stone coal is 1000℃, the roasting temperature of pyrolusite is 800℃, and the roasting time is 2 h. Other low-grade pyrolusite ores in China from Guangxi, Hunan, and Guizhou Provinces were tested and all these minerals responded well, giving -99% manganese reduction efficiency. Meanwhile, the reduction kinetic model has been established. It is confirmed that the reduction process is controlled by the interface chemical reaction. The apparent activation energy is 36.397 kJ/mol.

关键词： pyrolusite ore roasting ore reduction fluidized beds kinetics stone coal

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Double layered,one-pot hydrothermal synthesis of M-TiO_2(M=Fe^(3+),Ni^(2+),Cu^(2+)and Co^(2+)) and their application in photocatalysis

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Science China Chemistry 2013年第12期56卷 1783-1789页

作者： CHEN YingYing XIE YongBing YANG Jun CAO HongBin LIU Hui ZHANG Yi National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences University of Chinese Academy of Sciences

A double layered, one-pot hydrothermal method was adopted in this work to prepare transition metal ions （Fe3＋, Ni2＋, Cu2＋ and Co2＋） doped TiO〉 The morphology and chemical properties of TiO2 and the status of metal ions were characterized with XRD, TEM, BET, UV-Vis and XPS analysis. TEM images show that the obtained TiO2 was very uniform with an average particle size of 10.4 nm. XPS, TEM and XRD results show that transitional metals were doped onto TiO2 in the form of ions. Photocatalytic decomposition of oxalic acid under UV illumination and methylene blue degradation under visible light on these materials were conducted, respectively. The results reveal that Cu2＋-TiO2 and C02＋-TiO2 showed a highest activity under UV and visible light illumination, respectively, and they were both more active than commercial P25 TiO2. With this special design of double layers, the hydrolysis of titanium precursor in the system with water can be easily controlled and metal ions are simply doped. This strategy can be further applied to synthesize metal ion doped TiO2 using various metal precursors with controllable amounts, and thus lead to better optimization of highly active photocatalyst.

关键词： double layered hydrothermal synthesis metal ions doped Ti02 photocatalysis

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Assembly of MOF Microcapsules with Size‐Selective Permeability on Cell Walls

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Angewandte Chemie 2015年第3期128卷

作者： Wanbin Li Yufan Zhang Zehai Xu Qin Meng Zheng Fan Shuaiju Ye Guoliang Zhang Institute of Oceanic and Environmental Chemical Engineering State Key Lab Base of Green Chemical Synthesis Technology Zhejiang University of Technology Hangzhou 310014 P. R. China College of Engineering University of California Berkeley CA 94720 USA Department of Chemical and Biochemical Engineering State Key Laboratory of Chemical Engineering Zhejiang University Hangzhou 310027 P. R. China

The assembly of metal–organic frameworks (MOFs) into microcapsules has attracted great interest because of their unique properties. However, it remains a challenge to obtain MOF microcapsules with size selectivity at the molecular scale. In this report, we used cell walls from natural biomaterials as non‐toxic, stable, and inexpensive support materials to assemble MOF/cell wall (CW) microcapsules with size‐selective permeability. By making use of the hollow structure, small pores, and high density of heterogeneous nucleation sites of the cell walls, uniform and continuous MOF layers could be easily obtained by inside/outside interfacial crystallization. The prepared MOF/CW microcapsules have excellent stability and enable the steady, slow, and size‐selective release of small molecules. Moreover, the size selectivity of the microcapsules can be adjusted by changing the type of deposited MOF.

关键词： Metall-organische Gerüste Mikrokapseln Permeabilität Zellwände

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Unstrained carbon-carbon bond cleavage

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Chemistry - An Asian Journal 2014年第12期9卷 3360-3389页

作者： Liu, Hui Feng, Minghao Jiang, Xuefeng Shanghai Key Laboratory of Green Chemistry and Chemical Process Department of Chemistry East China Normal University 3663 North Zhongshan Road Shanghai200062 China School of Chemical Engineering Shandong University of Technology Zibo255049 China Peking University Beijing100871 China State Key Laboratory of Elemento-organic Chemistry Nankai University Tianjin300071 China

This Focus Review presents recent developments in the cleavage of C-C bonds in organic molecules. Significant progress in C-C activation, including the development of a variety of new synthetic strategies, has contributed to the development of this field over the past few decades. Transition-metal-mediated C-C bond cleavage has been shown to be a quite efficient process and several elegant metal-free methods have also recently been developed. Strained rings have been widely used in C-C cleavage transformations;however, unstrained C-C activation has increasingly caught the attention of organic researchers, which inspired us to clarify the developments in this field.

关键词： Transition metals

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Ligand Controlled Regiodivergent C1Insertion on Arynes for Construction of Phenanthridinone and Acridone Alkaloids

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Angewandte Chemie 2015年第49期127卷

作者： Minghao Feng Bingqing Tang Nengzhong Wang Hong‐Xi Xu Xuefeng Jiang Shanghai Key Laboratory of Green Chemistry and Chemical Process School of Chemistry and Molecular Engineering East China Normal University 3663N Zhongshan Road Shanghai 200062 (P.R. China) School of Pharmacy Shanghai University of Traditional Chinese Medicine Cai Lun Lu 1200 Shanghai 201203 (P.R. China) State Key Laboratory of Elemento‐organic Chemistry Nankai University Tianjin (P.R. China) State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai (P.R. China)

A palladium‐catalyzed regiodivergent C 1 insertion multicomponent reaction involving aryne, CO, and 2‐iodoaniline is established to construct the scaffolds of phenanthridinone and acridone alkaloids. Regioselective control is achieved under the guidance of selective ligands. The phenanthridinones are solely obtained under ligand‐free condition. In comparison, application of the electron‐abundant bidentate ligand dppm afforded the acridones with high efficiency. The release rate of the aryne from the precursor assists the regioselectivity of insertion as well, which was revealed through interval NMR tracking. A plausible mechanism was suggested based on the control experiments. Representative natural products and two types of natural product analogues were synthesized divergently through this tunable method.

关键词： Acridone Arine Ligandenkontrolle Mehrkomponentenreaktionen Phenanthridinone

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A novel mixer-settler-mixer three chamber integrated extractor for three-liquid-phase extraction of Li, B, and Mg from salt-lake brine

A novel mixer-settler-mixer three chamber integrated extract...

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第七届国际分离科学与技术会议

作者： Han Zheng Kun Huang Huizhou Liu Key Laboratory of Green Process and Engineering State Key Laboratory of Biochemical EngineeringInstitute of Process EngineeringChinese Academy of Sciences

A novel mixer-settler-mixer three chamber integrated extractor has been proposed for three-liquid-phase continuous extraction and separation of Li, B, and Mg from salt-lake brine. The three-liquid-phase system in settler consists of an organic solvent-rich top phase, tributyl phosphate (TBP) in kerosene, a polyethylene glycol (PEG)-rich middle phase and a (NH4)2SO4 -rich aqueous bottom phase. Various influences from three-phase flux, stirring rate, phase ratios, aqueous solution pH values, molar ratios of Fe/Li and Mg/Li, initial Cl - concentrations, added amounts of (NH4)2SO4 and PEG2000, volume percentage of TBP on three-liquid-phase partitioning of Li, B, and Mg have been investigated. Experimental results indicate that Li and B can be enriched into the top organic phase and middle PEG phase, respectively, while most of Mg remain in bottom aqueous phase. The present work highlights a feasible apparatus to perform continuous three-liquid-phase extraction. The results are important to future industrial application of the proposed three-liquid-phase extraction technique to recover Li and B values from salt-lake brines in west China.

关键词： PEG A novel mixer-settler-mixer three chamber integrated extractor for three-liquid-phase extraction of Li and Mg from salt-lake brine

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