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磷脂对脂肪酶催化性能的影响

催化学报 2012年第3期33卷 389-395页

作者：李扬杜伟刘德华清华大学化学工程系应用化学研究所北京100084

脂肪酶催化可再生动植物油脂的酰基化反应可以生产多种具有重要价值的化工产品,近年来受到了越来越多的关注.而天然油脂原料中往往含有一定量的磷脂,它对脂肪酶的催化活性、热稳定性以及反应动力学等的影响非常显著.介绍了油脂中存在磷... 详细信息

脂肪酶催化可再生动植物油脂的酰基化反应可以生产多种具有重要价值的化工产品,近年来受到了越来越多的关注.而天然油脂原料中往往含有一定量的磷脂,它对脂肪酶的催化活性、热稳定性以及反应动力学等的影响非常显著.介绍了油脂中存在磷脂的种类与结构,并分别针对脂肪酶催化的水解、酯化和转酯化反应过程,综述了磷脂对脂肪酶催化性能的影响,以及可能的作用机制.

关键词：油脂磷脂脂肪酶催化活性生物柴油

SYNTHESIS AND CATALYTIC PROPERTY OF POLYSTYRENE SUPPORTED GLUTAMIC ACID SCHIFF BASE COMPLEX OF Mn(Ⅱ) IN AEROBIC OXIDATION OF CYCLOHEXENE

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Chinese Journal of Reactive Polymers 2007年第Z1期 112-118页

作者： CHEN Songtao1, 2 ZHAO Ganqing1 LU Xiaoqing1 XIE J imin1 1. College of chemistry and chemical engineering, Jiangsu University Zhenjiang 212013, china 2. department of chemical engineering, Pingdingshan institute of Technology Pingdingshan 467001, china

The polystyrene supported glutamic acid Schiff base complex of Mn (Ⅱ) (PS-Sal-Glue-Mn) was prepared with chloromethylated styrene polymer beads, 2,4-dihydroxybenzaldehyde, L-glutamic acid and manganese (Ⅱ) acetate tetrahyrate. The polymeric ligand and the complex were characterized by FT-IR, small area X-ray photoelectron spectroscopy (XPS) and ICP-AES. In the presence of the manganese complex, cyclohexene (1) was effectively oxidized by molecular oxygen without reductant. The major products of the reaction were 2-cyclohexen-1-ol (2), 2-cyclohexen-1-one (3) and 2-cyclohexen-1- hydroperoxide (4), which was different with typical oxidation of cyclohexene. The influence of reaction temperature and additive for oxidation had been studied. The selectivity of 2-cyclohexen-1-hydroperoxide varied with reaction time and different additives. The mechanism of cyclohexene oxidation had also been discussed.

关键词： Aerobic oxidation Polystyrene supported manganese complex Cyclohexene Glutamic acid.

Studies on the Performance and Structure of Supported Catalysts for the Partial Oxidation of Methane to Syngas

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Journal of Energy chemistry 2002年第Z2期 159-164页

作者： Tinghua Wu, Mingqiao Zhu, Zhenjiang Niu, Yijun Zhong, Yan Guan, Ya Liu, Qiangu Yan, Zelin Li, Huilin WanZhejiang Normal University, institute of Physical chemistry, Jinhua 321004, chinaZhejiang University, department of chemical engineering, Hangzhou 310027, chinaXiamen University, department of chemistry, Xiamen 361005, china

The catalytic properties of several supported metal catalysts on different carriers were studied in the partial oxidation of methane (POM) to syngas. In our experiment, supported noble metal catalysts exhibited better performance than the other supported transition metal catalysts. The catalyst performances were significantly influenced by the d-electron configuration of the active metal components and the dispersion of active metal components on the support. A catalyst with a moderate number of unpaired electrons in the d-orbital of the active metal support without obvious acidity or redox activity (e.g. MgO) was suitable for POM performance. The Rh/SiO2 catalyst was the best in the POM reaction, among those investigated. Reaction conditions apparently also affected the POM performance of the catalyst. The conversion of methane and the selectivity for CO increased with the reaction temperature, and a high CH4/O2 ratio was not beneficial for POM performance.

关键词： 

Synthesis and Crystal Structure of FeCo_2(CO)_8(μ_3-S)〔P(OCH_2Ph)_3〕

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Chinese Journal of Structural chemistry 1998年第2期17卷 97-100页

作者： WANG Xiao-Ling SUO Quan-Ling WANG Yi-Bing LU Qing-Wei(department of chemical engineering, Inner Mongolia Polytechnic University, Hohhot, 010062)SUN Jie(Shanghai institute of Organic chemistry, the Chinese Academyof Sciences, Shanghai, 200032) department of chemical engineering Inner Mongolia Polytech. University Hohhot 010062 China Shanghai Inst. of Organic chemistry Chinese Academy of Sciences Shanghai 200032 China

The title compound FeCo2 (CO)8 (μ3-S) [P (OCH2Ph )3] was synthe-sized by the reaction of P (OCH2Ph)3 with FeCo2 (CO)9 (μ3-S) at room *** data: C29H21 O11 PSCo2Fe, Mr=782. 23, monoclinic, space group P21/n(14), a= l5. 123(4), b=14. 580(4), c=15. 942(3)A, g=115. 66(1), V=3168293K, final R= 0. 032, R= 0. 037 for 3010 observed reflections with I>3. 00(I).The monosubstituted ligand P (OCH2Ph )3 in FeCo2 (CO)8 (μ3-S ) [P (OCH2Ph )3] islinked to one cobalt atom of the tetrahedron FeCo2S framework.

关键词： synthesis crystal structure iron-cobalt cluster substituted reaction

STUDY ON THE ANION-EXCHANGE BEHAVIOUR OF MOLYBDENUM(Ⅵ) AND TUNGSTEN(Ⅵ)IN MIXED ORGANIC-AQUEOUS SOLVENTS

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chemical Research in Chinese Universities 1985年第2期 31-36页

作者： Cai Shulian(Tsai Shu Lien)and Zhou Zhiming(department of chemistry,Fudan University,Shanghai)(department of chemical engineering,Zhejiang institute of Technology,Hangzhou)

MONTE CARLO SIMULATIONS OF REVERSIBLE MELTING ON THE FOLD-END SURFACES OF POLYMER LAMELLAR CRYSTALS

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MONTE CARLO SIMULATIONS OF REVERSIBLE MELTING ON THE FOLD-EN...

5th International Symposium on engineering Plastics

作者： Xiaoming JIANG Wenbing HU~* department of Polymer Science and engineering School of chemistry and chemical engineering Nanjing University 210093 Nanjing china

＜正＞Reversible melting process exists at the fold-end surfaces of polymer lamellar crystals[1].This process has been evidenced by both experiments[2]and molecular simulations[3].However,the expected association between this process and the chain mobility requires further *** we performed dynamic Monte Carlo simulations of a polymer lamellar crystal in 3D lattice box with periodic boundary *** using saw-tooth-type temperature modulation upon the quasi-isothermal annealing,the internal energy of the crystal appears as a periodic response corresponding to the modulated temperatures,as shown in Fig *** chose the data analysis method without Fourier transformation,which was proposed by Hu et al.[4],to calculate the reversing heat capacity from the internal energy *** observed that the reversing heat capacity originates from the reversible melting process at the fold-end *** lower chain-sliding mobility in the lamellar crystal,the reversing heat capacity decreases,as shown in Fig *** result evidences the association between the reversible melting and the chain *** addition,with the increase of the modulated frequency,the reversing heat capacity exhibits a declining tendency,as shown in Fig *** result implies a competition between chain relaxation and temperature modulation.

关键词： Lamellar crystal Monte Carlo simulations Temperature modulated DSC Reversible melting

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灯芯绒织物的过醋酸漂白

染整技术 2004年第3期26卷 1-5页

作者：王晓明湖南工程学院化学化工系湖南湘潭411104

讨论了一种AOX较低的漂白剂——过醋酸在灯芯绒织物上的应用,确定了过醋酸漂白灯芯绒织物的最佳工艺条件:15％的过醋酸 7g/L、pH值 7左右、温度 70℃,时间 80min、焦磷酸钠 3g/L,浴比 1:30。用焦磷酸钠作为过醋酸漂白的稳定剂,对提高白... 详细信息

讨论了一种AOX较低的漂白剂——过醋酸在灯芯绒织物上的应用,确定了过醋酸漂白灯芯绒织物的最佳工艺条件:15％的过醋酸 7g/L、pH值 7左右、温度 70℃,时间 80min、焦磷酸钠 3g/L,浴比 1:30。用焦磷酸钠作为过醋酸漂白的稳定剂,对提高白度很重要;同时就漂白效果及染后表观色深与过氧化氢漂白工艺进行了比较。

关键词：漂白过醋酸灯芯绒织物白度断裂强度

ETHYLENE/PROPYLENE COPOLYMERIZATION BY NOVEL VANADIUM/TITANIUM BIMETALLIC CATALYST

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ETHYLENE/PROPYLENE COPOLYMERIZATION BY NOVEL VANADIUM/TITANI...

5th International Symposium on High-Tech Polymer Materials

作者： Tao Jiang Wei Du Dengfei Wang Li Zhang department of chemistry and chemical engineering Daqing Petroleum institute Daqing china

＜正＞Vanadium-based Ziegler-Natta catalysts are unique in their abilities to incorporate ethylene and propylene monomers in a random order.[l] But the low activity of vanadium catalyst limits its further ***,the traditional titanium-based Ziegler-Natta catalysts used in ethylene/propylene copolymerization had a high catalytic activity while produced copolymers with

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水溶性气雾杀虫剂的研制

湘潭师范学院学报（自然科学版） 2003年第1期25卷 67-69页

作者：苏娇莲唐小莉湖南工程学院化学化工系湖南湘潭411104

以拟除虫菊酯类原药为主要成分 ,通过选择合适的表面活性剂与HLB值 ,使原药与增效剂等有机相均匀分散在水中 ,以此制备了一种稳定的水溶性气雾杀虫剂。

关键词：水溶性气雾杀虫剂研制