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18 条记录 (耗时 0.018 秒)

    Neutral-aged hydrophobic silica gels with reduced surface area
    2.
    发明授权
    Neutral-aged hydrophobic silica gels with reduced surface area 失效
    中性疏水硅胶，表面积减小

    公开(公告)号：US6107351A

    公开(公告)日：2000-08-22

    申请号：US28038

    申请日：1998-02-23

    申请人： Gary Thomas Burns ,  Qin Deng ,  James Richard Hahn ,  Clifford Carlton Reese

    发明人： Gary Thomas Burns ,  Qin Deng ,  James Richard Hahn ,  Clifford Carlton Reese

    IPC分类号： C01B33/159 ,  C01B33/16 ,  C09C1/30 ,  B01J13/00 ,  B01J2/30 ,  C04B14/04

    CPC分类号： B82Y30/00 ,  C01B33/16 ,  C09C1/3081 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/22 ,  C01P2006/80 ,  C01P2006/90 ,  Y10T428/2995

    摘要： The present invention is neutral-aged hydrophobic silica gels having a reduced surface area and a method for their preparation. The method comprises three steps, where in the first step a mixture comprising a silica hydrosol and colloidal silica is contacted with a strong mineral acid at a pH less than about 1 to form a silica hydrogel having incorporated therein colloidal silica. In the second step the silica hydrogel is aged at a pH within a range of about pH 3.5 to pH 8. In the third step the silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel to form a hydrophobic silica hydrogel having a surface area within a range of about 100 m.sup.2 /g to 450 m.sup.2 /g in the dry state. In a preferred method the hydrophobic silica hydrogel and is further contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel.

    摘要翻译： 本发明是具有减小的表面积的中性疏水性硅胶，及其制备方法。 该方法包括三个步骤，其中在第一步骤中，将包含二氧化硅水溶胶和胶体二氧化硅的混合物与pH值小于约1的强无机酸接触以形成掺入胶体二氧化硅的二氧化硅水凝胶。 在第二步中，将二氧化硅水凝胶在约3.5至约8的pH范围内老化。在第三步中，在催化量的强酸存在下，使二氧化硅水凝胶与有机硅化合物接触以进行疏水 的二氧化硅水凝胶以形成在干燥状态下表面积在约100m 2 / g至450m 2 / g范围内的疏水性二氧化硅水凝胶。 在优选的方法中，疏水性二氧化硅水凝胶进一步与足够量的与水不混溶的有机溶剂接触以将疏水性二氧化硅水凝胶转化成疏水性二氧化硅有机凝胶。

    Synthesis of functional silyl terminated branched polyalkenylenes and polyolefins
    3.
    发明授权
    Synthesis of functional silyl terminated branched polyalkenylenes and polyolefins 失效
    功能性甲硅烷基封端的支链聚烯烃和聚烯烃的合成

    公开(公告)号：US5808126A

    公开(公告)日：1998-09-15

    申请号：US927151

    申请日：1997-09-03

    申请人： Krystyna Regina Brzezinska ,  Gary Thomas Burns ,  Russell Keith King ,  Kenneth Boone Wagener

    发明人： Krystyna Regina Brzezinska ,  Gary Thomas Burns ,  Russell Keith King ,  Kenneth Boone Wagener

    IPC分类号： C08C19/25 ,  C08F32/00 ,  C07F7/08

    CPC分类号： C08F32/00 ,  C08C19/25

    摘要： A method for preparing an .alpha.,.omega.-silyl terminated branched polyalkenylenes and polyolefins is provided. The method involves: (I) reacting a mixture comprising (A) at least one branched acyclic diene, and (B) at least one alkenylsilane in the presence of an acid free metathesis catalyst system to produce an .alpha.,.omega.-silyl terminated branched polyalkenylene; or (I) reacting a mixture of (A) at least one cycloolefin, and (B) at least one alkenylsilane in the presence of an acid free metathesis catalyst system to produce an .alpha.,.omega.-silyl terminated branched polyalkenylene. The .alpha.,.omega.-silyl terminated branched polyalkenylene produced by these methods may be hydrogenated to produce an .alpha.,.omega.-silyl terminated branched polyolefin.

    摘要翻译： 提供了制备α，ω-甲硅烷基封端的支链聚烯烃和聚烯烃的方法。 该方法包括：（I）使含有（A）至少一种支链非环状二烯和（B）至少一种烯基硅烷的混合物在无酸的复分解催化剂体系存在下反应，以产生α，ω-甲硅烷基封端的支链聚亚烷基 ; 或（I）在无酸复分解催化剂体系的存在下使（A）至少一种环烯烃和（B）至少一种烯基硅烷的混合物反应，以产生α，ω-甲硅烷基封端的支链聚亚烷基。 通过这些方法制备的α，ω-甲硅烷基封端的支链聚亚烷基可以被氢化以产生α，ω-甲硅烷基封端的支链聚烯烃。

    Process for making hydrophobic silica with reduced surface area under neutral conditions
    7.
    发明授权
    Process for making hydrophobic silica with reduced surface area under neutral conditions 失效
    在中性条件下制备表面积减小的疏水性二氧化硅的方法

    公开(公告)号：US5942590A

    公开(公告)日：1999-08-24

    申请号：US22282

    申请日：1998-02-11

    申请人： Gary Thomas Burns ,  Qin Deng ,  James Richard Hahn ,  Clifford Carlton Reese

    发明人： Gary Thomas Burns ,  Qin Deng ,  James Richard Hahn ,  Clifford Carlton Reese

    IPC分类号： C01B33/159 ,  C01B33/16 ,  C09C1/30 ,  C08G77/00

    CPC分类号： B82Y30/00 ,  C01B33/16 ,  C09C1/3081 ,  C09C1/309 ,  C01P2004/51 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/90

    摘要： The present invention is hydrophobic silica gels having a reduced surface area and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a mixture comprising a silica hydrosol and colloidal silica is adjusted with a base to within a range of pH 3 to pH 6 to facilitate formation of a silica hydrogel having incorporated therein colloidal silica. In the second step the silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel to form a hydrophobic silica gel having a surface area within a range of about 100 m.sup.2 /g to 450 m.sup.2 /g in the dry state. In a preferred process the hydrophobic silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel. A water soluble compound of cerium or iron may be added during conduct of the second step to improve heat stability of the hydrophobic silica gel.

    摘要翻译： 本发明是具有减小的表面积的疏水性硅胶和其在中性条件下制备的方法。 该方法包括两个步骤，其中在第一步骤中，将包含二氧化硅水溶胶和胶体二氧化硅的混合物的pH调节至碱在pH 3至pH 6的范围内，以促进形成掺入胶体二氧化硅的二氧化硅水凝胶 。 在第二步骤中，二氧化硅水凝胶在催化量的强酸存在下与有机硅化合物接触，以实现二氧化硅水凝胶的疏水化，从而形成表面积在约100m 2 / g范围内的疏水性硅胶 在干燥状态下为450m2 / g。 在优选的方法中，将疏水性硅胶与足够量的与水不混溶的有机溶剂接触以将疏水性二氧化硅水凝胶转化成疏水性二氧化硅有机凝胶。 在第二步进行时可以加入铈或铁的水溶性化合物，以提高疏水硅胶的热稳定性。

    Hydrophobic organosilicate-modified silica gels
    8.
    发明授权
    Hydrophobic organosilicate-modified silica gels 失效
    疏水有机硅酸酯改性硅胶

    公开(公告)号：US5750610A

    公开(公告)日：1998-05-12

    申请号：US805102

    申请日：1997-02-24

    申请人： Gary Thomas Burns ,  James Richard Hahn ,  Clifford Carlton Reese

    发明人： Gary Thomas Burns ,  James Richard Hahn ,  Clifford Carlton Reese

    IPC分类号： C01B33/159 ,  C08K9/06 ,  C09C1/30 ,  C09C3/12 ,  C08K3/10 ,  C08G77/06

    CPC分类号： C08K9/06

    摘要： The present invention is hydrophobic organosilicate-modified silica gels and a method for their preparation. The method comprises two steps, where in the first step an organosilicate-modified silica hydrosol is heat treated in the presence of a strong mineral acid at a pH less than about pH 1 to form an organosilicate-modified silica hydrogel. In the second step the organosilicate-modified silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the organosilicate-modified silica hydrogel thereby forming a hydrophobic organosilicate-modified silica hydrogel having a surface area within a range of about 100 m.sup.2 /g to 750 m.sup.2 /g as measured in the dry state. In a preferred method the hydrophobic organosilicate-modified silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic organosilicate-modified silica hydrogel into a hydrophobic organosilicate-modified silica organogel.

    摘要翻译： 本发明是疏水性有机硅酸酯改性硅胶及其制备方法。 该方法包括两个步骤，其中在第一步中，在pH小于约pH 1的强无机酸存在下，将有机硅酸酯改性的二氧化硅水溶胶进行热处理，形成有机硅酸酯改性的二氧化硅水凝胶。 在第二步中，有机硅酸酯改性的二氧化硅水凝胶在催化量的强酸存在下与有机硅化合物接触，以进行有机硅酸酯改性的二氧化硅水凝胶的疏水，从而形成具有表面积的疏水性有机硅酸酯改性二氧化硅水凝胶 在干燥状态下测量的约100m 2 / g至750m 2 / g的范围内。 在优选的方法中，将疏水性有机硅酸酯改性的硅胶与足够量的与水不混溶的有机溶剂接触以将疏水性有机硅酸酯改性的二氧化硅水凝胶转化成疏水性有机硅酸酯改性的二氧化硅有机凝胶。