The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
Xun Wang - One of the best experts on this subject based on the ideXlab platform.
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xia Gu, Xun WangAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst promoted by haloalkane and metal chlorides (VCl3, CrCl3, and TiCl3). The promotion effects of haloalkane and metal chlorides on oligomerization activity and properties of the oligomers formed were investigated. The small amount of VCl3 added into the EtAlCl2–CHCl3 catalyst can increase the oligomerization yield from 85.90 to 94.18% and viscosity index from 152 to 158, accompanied by a slight decrease in viscosity. VCl3 enhances the activation of EtAlCl2–CHCl3 through the formation of bimetallic species containing two Al–Cl–V bridging bonds, which can increase release ability of carbocations from CHCl3 to promote activity and improve viscosity-temperature performance of the oligomers formed. The oligomer structure characterized by 1H and 13C NMR spectra indicates that the oligomerization of 1-Decene on the EtAlCl...
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xun Wang, Tao Jiang, Xiaoyan GuoAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst ...
Huaiqi Shao - One of the best experts on this subject based on the ideXlab platform.
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xia Gu, Xun WangAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst promoted by haloalkane and metal chlorides (VCl3, CrCl3, and TiCl3). The promotion effects of haloalkane and metal chlorides on oligomerization activity and properties of the oligomers formed were investigated. The small amount of VCl3 added into the EtAlCl2–CHCl3 catalyst can increase the oligomerization yield from 85.90 to 94.18% and viscosity index from 152 to 158, accompanied by a slight decrease in viscosity. VCl3 enhances the activation of EtAlCl2–CHCl3 through the formation of bimetallic species containing two Al–Cl–V bridging bonds, which can increase release ability of carbocations from CHCl3 to promote activity and improve viscosity-temperature performance of the oligomers formed. The oligomer structure characterized by 1H and 13C NMR spectra indicates that the oligomerization of 1-Decene on the EtAlCl...
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xun Wang, Tao Jiang, Xiaoyan GuoAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst ...
Xiaoyan Guo - One of the best experts on this subject based on the ideXlab platform.
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xun Wang, Tao Jiang, Xiaoyan GuoAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst ...
Ruofei Wang - One of the best experts on this subject based on the ideXlab platform.
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xia Gu, Xun WangAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst promoted by haloalkane and metal chlorides (VCl3, CrCl3, and TiCl3). The promotion effects of haloalkane and metal chlorides on oligomerization activity and properties of the oligomers formed were investigated. The small amount of VCl3 added into the EtAlCl2–CHCl3 catalyst can increase the oligomerization yield from 85.90 to 94.18% and viscosity index from 152 to 158, accompanied by a slight decrease in viscosity. VCl3 enhances the activation of EtAlCl2–CHCl3 through the formation of bimetallic species containing two Al–Cl–V bridging bonds, which can increase release ability of carbocations from CHCl3 to promote activity and improve viscosity-temperature performance of the oligomers formed. The oligomer structure characterized by 1H and 13C NMR spectra indicates that the oligomerization of 1-Decene on the EtAlCl...
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preparation of lubricant base stocks with high viscosity index through 1 decene oligomerization catalyzed by alkylaluminum chloride promoted by metal chloride
Energy & Fuels, 2020Co-Authors: Huaiqi Shao, Ruofei Wang, Xun Wang, Tao Jiang, Xiaoyan GuoAbstract:In this paper, poly-α-olefins oil base stocks with medium kinematic viscosity and high viscosity index were prepared by 1-Decene oligomerization catalyzed using the alkylaluminum chloride catalyst ...
Naili Wang - One of the best experts on this subject based on the ideXlab platform.
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flavonoids and a new polyacetylene from bidens parviflora willd
Molecules, 2008Co-Authors: Yulan Li, Jun Li, Naili WangAbstract:Fifteen flavonoids, 1-7 and 9-16, and a polyacetylene, 8, were isolated from the ethanol extract of the dried whole plant of Bidens parviflora Willd. by various chromatographic techniques. Their structures have been elucidated on the basis of spectroscopic analyses and chemical studies. Compound 8 is new and was identified as 3-(R),8(E)-decene-4,6-diyne-1,3,10-triol. All the flavonoid compounds were isolated for the first time from this plant species.
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antiallergic agents from natural sources 3 structures and inhibitory effects on nitric oxide production and histamine release of five novel polyacetylene glucosides from bidens parviflora willd
Chemical & Pharmaceutical Bulletin, 2001Co-Authors: Naili Wang, Rie Ishii, Susumu KitanakaAbstract:Five new polyacetylene glucosides, bidensyneosides A1, A2, B, C (1-4), and 3-deoxybidensyneoside B (5), have been isolated from the air-dried whole plant of Bidens parviflora WILLD. The structures were identified based on spectroscopic analysis, physicochemical properties, and application of the modified Mosher method to be 3(R), 8(E)-8-decene-4, 6-diyne-1, 3-diol 1-O-β-D-glucopyranoside (1), deca-3(R), 8(Z) 8-decene-4, 6-diyne-1, 3-diol 1-O-β-D-glucopyranoside (2), 3(R)-deca-4, 6, 8-triyne-1, 3-diol 1-O-β-D-glucopyranoside (3), 3(R), 8(E)-8-decene-4, 6-diyne-1, 3, 10-triol 1-O-β-D-glucopyranoside (4), and 8(E)-8-decene-4, 6-diyne-1, 10-diol 1-O-β-D-glucopyranoside (5), respectively. These compounds inhibited nitric oxide (NO) production in lipopolysaccharide and interferon-γ activated murine macrophages (RAW264.7) and also inhibited histamine release from rat mast cells stimulated by the antigen-antibody reaction.
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antiallergic agents from natural sources 3 structures and inhibitory effects on nitric oxide production and histamine release of five novel polyacetylene glucosides from bidens parviflora willd
Chemical & Pharmaceutical Bulletin, 2001Co-Authors: Naili Wang, Rie Ishii, Xinsheng Yao, Susumu KitanakaAbstract:Five new polyacetylene glucosides, bidensyneosides A1, A2, B, C (1-4), and 3-deoxybidensyneoside B (5), have been isolated from the air-dried whole plant of Bidens parviflora WILLD. The structures were identified based on spectroscopic analysis, physicochemical properties, and application of the modified Mosher method to be 3(R), 8(E)-8-decene-4, 6-diyne-1, 3-diol 1-O-β-D-glucopyranoside (1), deca-3(R), 8(Z) 8-decene-4, 6-diyne-1, 3-diol 1-O-β-D-glucopyranoside (2), 3(R)-deca-4, 6, 8-triyne-1, 3-diol 1-O-β-D-glucopyranoside (3), 3(R), 8(E)-8-decene-4, 6-diyne-1, 3, 10-triol 1-O-β-D-glucopyranoside (4), and 8(E)-8-decene-4, 6-diyne-1, 10-diol 1-O-β-D-glucopyranoside (5), respectively. These compounds inhibited nitric oxide (NO) production in lipopolysaccharide and interferon-γ activated murine macrophages (RAW264.7) and also inhibited histamine release from rat mast cells stimulated by the antigen-antibody reaction.
