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COPOLYMERIZATION OF ETHYLENE WITH 1-octene USING Et(Ind)_2ZrCl_2/MAO CATALYST

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Chinese Journal of Polymer Science 1998年第1期16卷 32-37页

作者：姚晖肖士镜陆宏兰 Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

Copolymerization of ethylene/1-octene was carried out in toluene withvarious concentrations of comonomer in the feed using Et(Ind)_2ZrCl_2/MAO (methyl alu-minoxane) as catalyst. It was found that with the increase of 1-octene concentration in thefeed the content of 1-octene in the copolymer increases, while the density, melting point,crystallinity and intrinsic viscosity of copolymer decrease. A copolymer with very lowdensity, containing 11.5 mol% of 1-octene (VLLDPE) can be produced with this catalystsystem. The effect of temperature and zirconium aluminum mole ratio of the catalyst onthe copolymerization was also investigated. The results of ^(13)C NMR determination of thecopolymer showed that the 1-octene units in the copolymer are principally isolated.

关键词： Copolymerization Ethylene 1-octene Methylaluminoxane Et(Ind)_2ZrCl_2

Thermoregulated Organic Biphasic Hydrogenation of 1-octene Catalyzed by Ru/PETPP Complex

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Chinese Chemical Letters 2006年第2期17卷 255-257页

作者： Ya Dong LU Yan Hua WANG Zi Lin JIN State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116012

Thermoregulated organic biphasic system composed of triethylene glycol monomethyl ether （TGME） and n-heptane was first applied to the hydrogenation of 1-octene. Under the optimal conditions： P（H2）=5.0MPa, T=80℃, t=3h, 1-octene/Ru=1000 （molar ratio）, the yield of n-octane reached up to 99.6%. Furthermore, the simply decanted catalyst could be reused for 10 times without apparent loss of catalytic activity.

关键词： Thermoregulated organic biphasic system hydrogenation 1-octene ruthenium.

Hydroformylation of 1-octene over Nanotubular TiO2-supported Amorphous Co-B Catalysts

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Chemical Research in Chinese Universities 2015年第5期31卷 851-857页

作者： SHI Yukun HU Xiaojing ZHU Baolin ZHANG Shoumin HUANG Weiping Department of Chemistry Collaborative Innovation Center of Chemical Science and Engineering The Key Laboratory of Advanced Energy Materials Chemistry Ministry of Education Tianjin Key Lab of Metal and Molecule-based Material Chemistry Nankai University Tianjin 300071 P. R. China

TiO2 nanotubes supported amorphous Co-B（Co-B/TNTs） catalyst was prepared via impregnation- chemical reduction procedure. The catalyst was characterized with transmission electron microscopy（TEM）, ammonia temperature-programmed desorption（NH3-TPD）, thermogravimetry-differential thermal analysis（TG-DTA）, Fourier transform infrared spectroscopy（FTIR） and Raman spectroscopy. The effects of temperature and ratio of CO to HE on the hydroformylation of 1-octene were studied. At an optimized reaction temperature（150 ℃） and volume ratio of CO to H2（2：1）, the conversion of 1-octene can reach 97.4% with a selectivity of 23.1% for total aldehydes and n/i-aldehyde molar ratio of 40：60. To obtain higher selectivity for linear aldehydes, Co-B/TNTs modified with triphenylphosphine for the hydroformylation of 1-octene were investigated. When molar ratio of P/Co was 4, the yield of total aldehydes was the highest（31.6%） with a good selectivity for linear product（n/i-aldehyde molar ratio was 70：30）. In recycle use, the Co-B/TNTs catalyst modified with triphenylphosphine could be reused five times without reducing the activity and selectivity obviously. For a comparative study, all the Co-B/TNTs to catalyze the hydroformylation of other olefins exhibited high conversion under the optimized conditions.

关键词： Hydroformylation TiO2 nanotubes Amorphous Co-B 1-octene

Synthesis of 1-octene Oligomer by Rare Earth Coordination Catalyst

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Journal of Rare Earths 1992年第3期10卷 195-198页

作者：张小俊杨慕杰沈之荃 Department of Chemistry Zhejiang UniversityHangzhou 310027China

The polymerization of 1-octene with Nd(P_(204))_3-AlEt_3 catalyst has been successfully carried out for the first *** features of polymerization of 1-octene are *** 1-octene oligomer prepared has an average molecular weight of about 10~3 with molecular weight distribution of about *** has a terminal double bond,which can be transferred into terminal carboxy group by direct oxidation with KMnO_4 in acidic solution, and then can be esterified with polyglycol.

关键词： Rare earth coordination catalyst 1-octene Oligomer

COPOLYMERIZATION OF 1-octene WITH STYRENE BY RARE EARTH COORDINATION CATALYSTS

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Chinese Journal of Polymer Science 1992年第2期10卷 106-112页

作者：杨慕杰张小俊李俭扶沈之荃 Department of Chemistry Zhejiang University Hangzhou 310027

The copolymerization of l-octene with styrene catalyzed by rare earth coordination catalysts has been studied for the first time. Some features and kinetic behavior are described. The overall activation energy of the copolymerization was 22.2 KJ/mol and the copolymerization rate could be expressed as R_p=K_p [Nd] [M]~2. (=1.68×10^(-3) L^2/mol^2. S, 50℃, [Oct]/[St]=1). The catalytic activity of various rare earth elements in Ln (naph)_3 for the copolymerization was compared and shows the following sequence: Dy, Y, Yb>Ho>Sm, Gd, Nd>Pr>Ce>La>Tm. Both monomers of l-octene and styrene in the copolymerization by Nd (naph)_3-AlEt_3 have the tendency of constant proportion copolymerization. The structure of the copolymers was studied by ~1H-NMR.

关键词： 1-octene Styrene Copolymerization Rare earth catalyst

Highly Selective Diphoshinoamine/Cr(III) Catalysts for Ethylene Tetramerization

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Chinese Chemical Letters 2006年第3期17卷 358-360页

作者： Tao JIANG Hong Xia CHEN Ying Nan NING Wei CHEN School of Chemistry ＆ Chemical Daqing Petroleum Institute Daqing 163318 SINOPEC Beijing Research Institute of Chemical Industry Beijing 100013

Two novel diphoshinoamine ligands have been synthesized. Combination of Cr（Ⅲ） and methylaluminoxane（MAO） generated active catalytic system which can catalyze tetramerization of ethylene with high catalytic activi... 详细信息

关键词： Ethylene tetramerization 1-octene Cr(Ⅲ) diphoshinoamine MAO catalyst

Preparation and Catalytic Performance of Silica-Supported Cr(acac)_3/PNP for Ethylene Tetramerization

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China Petroleum Processing & Petrochemical Technology 2014年第1期16卷 45-51页

作者： Shao Huaiqi Li Yafei Gao Xianglu Zhang Baojun Yi Jianjun Jiang Tao Li Jian College of Material Science and Chemical Engineering Tianjin University of Science & Technology Petrochemical Research Institute PetroChina

Chromium acetylacetonate and bis(diphenylphosphino)isopropylamine were coordinated in situ and supported on methylaluminoxane-modified silica. The catalyst structure and effects of reaction temperature, reaction pressure and Al/Cr molar ratio on ethylene tetramerization were investigated in detail. Chromium was uniformly and firmly immobilized on the support and could not be leached off by methylaluminoxane. The supported catalyst, upon being activated with methylaluminoxane, exhibited catalytic activity of 1.70×107 g/(mol Cr·h) for ethylene tetramerization to form 1-octene at a reaction temperatures of 80 ℃, a pressure of 2.0 MPa and an Al/Cr molar ratio of 300. The supported catalyst presented a good tolerance to high temperature.

关键词： ethylene tetramerization 1-octene Cr(acac)3/PNP supported catalyst