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1.发明授权Method for removing metal contaminants from solution using mercapto-functional silica xerogels 失效使用巯基官能二氧化硅干凝胶从溶液中除去金属污染物的方法
公开(公告)号：US06013187A
公开(公告)日：2000-01-11
申请号：US144211
申请日：1998-08-31
申请人： Gary Thomas Burns , Qin Deng , James Richard Hahn , Guy Leo Reggio , Kai Su
发明人： Gary Thomas Burns , Qin Deng , James Richard Hahn , Guy Leo Reggio , Kai Su
CPC分类号： B01J20/3257 , B01D15/00 , B01J20/28057 , B01J20/28076 , B01J20/28083 , B01J20/3242 , Y10S210/912
摘要： A method for removing metal contaminates from solution using mercapto-functional silica xerogels. The mercapto-functional silica xerogels are characterized by having a surface area greater than 365 m.sup.2 /g, an average pore diameter of at least 6 nm, and a pore volume of at least 2 cm.sup.3 /g. The mercapto-functional silica xerogels are particularly useful for removing Group VIII metals such as platinum from solutions comprising polyorganosiloxane fluids and resins.
摘要翻译： 使用巯基官能二氧化硅干凝胶从溶液中除去金属污染物的方法。 巯基官能二氧化硅干凝胶的特征在于表面积大于365m 2 / g，平均孔径至少为6nm，孔体积为至少2cm 3 / g。 巯基官能的二氧化硅干凝胶特别可用于从包含聚有机硅氧烷流体和树脂的溶液中除去第Ⅷ族金属如铂。
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2.发明授权Method for making hydrophobic organosilicate-modified silica gels under neutral conditions 失效在中性条件下制备疏水性有机硅酸酯改性硅胶的方法
公开(公告)号：US5789495A
公开(公告)日：1998-08-04
申请号：US806011
申请日：1997-02-24
IPC分类号： C01B33/159 , C01B33/16 , C09C1/30 , C09C3/12 , C08F283/00
CPC分类号： C01B33/16
摘要： The present invention is hydrophobic organosilicate-modified silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of an organosilicate-modified silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of 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 to form a hydrophobic organosilicate-modified silica gel having a surface area within a range of about 100 m.sup.2 /g to 850 m.sup.2 /g in the dry state. In a preferred process the hydrophobic organosilicate-modified silica hydrogel 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. A water soluble compound of cerium or iron may be added in the second step to improve the heat stability of the hydrophobic organosilicate-modified silica gel.
摘要翻译： 本发明是疏水性有机硅酸酯改性二氧化硅凝胶及其在中性条件下制备的方法。 该方法包括两个步骤，其中在第一步中，将有机硅酸酯改性的二氧化硅水溶胶的pH用碱调节至约pH 3至pH 7的范围内，以促进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，以实现有机硅酸酯改性的二氧化硅水凝胶的疏水化，从而形成具有表面积的疏水性有机硅酸酯改性硅胶 在干燥状态下在约100m 2 / g至850m 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二氧化硅水凝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。 可以在第二步中加入铈或铁的水溶性化合物，以提高疏水性有机硅酸酯改性硅胶的热稳定性。
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公开(公告)号：US6107351A
公开(公告)日：2000-08-22
申请号：US28038
申请日：1998-02-23
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。
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公开(公告)号：US5807501A
公开(公告)日：1998-09-15
申请号：US801410
申请日：1997-02-20
IPC分类号： C01B33/159 , C01B33/16 , C09C1/30 , B01J13/00 , C04B14/04
CPC分类号： C01B33/16 , C09C1/3081 , C01P2004/61 , C01P2006/12 , C01P2006/14 , C01P2006/16 , C01P2006/22 , C01P2006/60 , C01P2006/90 , Y10T428/2995
摘要： The present invention is neutral-aged hydrophobic organosilicate-modified silica gels and a method for their preparation. The method comprises three steps, where in the first step an organosilicate-modified silica hydrosol is contacted with a strong mineral acid at a pH less than about 1 to form an organosilicate-modified silica hydrogel. In the second step the organosilicate-modified silica hydrogel is aged at a pH within a range of about pH 3.5 to pH 8. In the third step the neutral-aged 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 to form 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 in the dry state. In a preferred process the hydrophobic organosilicate-modified silica hydrogel 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： 本发明是中性老化的疏水性有机硅酸酯改性硅胶及其制备方法。 该方法包括三个步骤，其中在第一步中，将有机硅酸酯改性的二氧化硅水溶胶与pH值小于约1的强无机酸接触以形成有机硅酸酯改性的二氧化硅水凝胶。 在第二步中，将有机硅酸酯改性的二氧化硅水凝胶在pH值约为3.5至pH8的范围内老化。在第三步中，将中性有机硅酸酯改性的二氧化硅水凝胶与有机硅化合物在 催化量的强酸以实现有机硅酸酯改性二氧化硅水凝胶的疏水化，从而形成疏水性有机硅酸酯改性二氧化硅水凝胶，其在干燥状态下的表面积为约100m 2 / g至750m 2 / g。 在优选的方法中，将疏水性有机硅酸酯改性的二氧化硅水凝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。
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公开(公告)号：US5708069A
公开(公告)日：1998-01-13
申请号：US805398
申请日：1997-02-24
IPC分类号： C01B33/159 , C08K9/06 , C09C1/28 , C09C3/12 , C08K3/10
CPC分类号： C08K9/06 , Y10T428/2962 , Y10T428/2995
摘要： The present invention is hydrophobic silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of a silica hydrogel. 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. In a preferred method, in a third step 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.
摘要翻译： 本发明是疏水性硅胶及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，将二氧化硅水溶胶的pH用碱调节至约pH 3至pH 7的范围内以促进二氧化硅水凝胶的形成。 在第二步中，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。 在优选的方法中，在第三步骤中，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。
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公开(公告)号：US06184408B2
公开(公告)日：2001-02-06
申请号：US09299863
申请日：1999-04-28
申请人： Gary Thomas Burns , Qin Deng , James Richard Hahn , Thomas G. Krivak , Timothy A. Okel , Clifford Carlton Reese
发明人： Gary Thomas Burns , Qin Deng , James Richard Hahn , Thomas G. Krivak , Timothy A. Okel , Clifford Carlton Reese
IPC分类号： C07F708
CPC分类号： C09C1/3081 , C01B33/193 , C01P2006/12 , C01P2006/90
摘要： A method for the preparation of hydrophobic precipitated silica. The method comprises contacting an aqueous suspension of a hydrophilic precipitated silica with (1) a catalytic amount of an acid and (2) an organosilicon compound in the presence of (3) a water-miscible organic solvent in an amount sufficient to facilitate reaction of the hydrophilic precipitated silica with the organosilicon compound to form a hydrophobic precipitated silica.
摘要翻译： 疏水性沉淀二氧化硅的制备方法。 该方法包括在（3）水混溶性有机溶剂存在下使亲水沉淀二氧化硅的水性悬浮液与（1）催化量的酸和（2）有机硅化合物接触，其量足以促进 亲水沉淀二氧化硅与有机硅化合物形成疏水性沉淀二氧化硅。
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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
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。
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公开(公告)号：US6051672A
公开(公告)日：2000-04-18
申请号：US138906
申请日：1998-08-24
申请人： Gary Thomas Burns , Jon Vierling DeGroot, Jr. , James Richard Hahn , Daniel Anton Harrington , Patricia Ann Moore
发明人： Gary Thomas Burns , Jon Vierling DeGroot, Jr. , James Richard Hahn , Daniel Anton Harrington , Patricia Ann Moore
CPC分类号： B82Y30/00 , C01B33/149 , C09C1/3081 , C01P2004/04 , C01P2004/32 , C01P2004/64 , C01P2006/22 , C01P2006/80 , C01P2006/90
摘要： A method for making hydrophobic non-aggregated colloidal silica comprising reacting an aqueous suspension of a hydrophilic non-aggregated colloidal silica having an average particle diameter greater than about 4 nm with a silicon compound at a pH less than about pH 4 in the presence of a sufficient quantity of a water-miscible organic solvent to facilitate contact of the hydrophilic non-aggregated colloidal silica with the silicon compound. The method is conducted at a temperature within a range of about 20.degree. C. to 250.degree. C. for a period of time sufficient to form a hydrophobic non-aggregated colloidal silica. The hydrophobic non-aggregated colloidal silicas prepared by the present method are particularly useful as fillers in silicone compositions such as adhesives, rubbers, and sealants.
摘要翻译： 一种制备疏水性非聚集胶体二氧化硅的方法，包括使平均粒径大于约4nm的亲水性非聚集胶体二氧化硅的水悬浮液与小于约pH 4的pH值的硅化合物在 足够量的可与水混溶的有机溶剂以促进亲水性非聚集的胶体二氧化硅与硅化合物的接触。 该方法在约20℃至250℃的温度范围内进行足够长的时间以形成疏水性非聚集的胶体二氧化硅。 通过本方法制备的疏水非聚集胶体二氧化硅特别可用作硅氧烷组合物如粘合剂，橡胶和密封剂中的填料。
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公开(公告)号：US5789514A
公开(公告)日：1998-08-04
申请号：US806016
申请日：1997-02-24
CPC分类号： C01B33/16
摘要： A method for the preparation of hydrophobic silica gels which are useful as reinforcing fillers in rubber compositions. The method comprises two steps, where in the first step a silica hydrosol is contacted with a sufficient concentration of a strong mineral acid at a pH less than about pH 1 to form a silica hydrogel. In the second step the silica hydrogel is contacted with described organosilicon compounds in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel thereby forming a hydrophobic silica gel 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 silica hydrogel is 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： 疏水性硅胶的制备方法，其用作橡胶组合物中的增强填料。 该方法包括两个步骤，其中在第一步骤中，将二氧化硅水溶胶与足够浓度的强无机酸在pH小于约pH 1下接触以形成二氧化硅水凝胶。 在第二步中，二氧化硅水凝胶在催化量的强酸存在下与所述的有机硅化合物接触，以实现二氧化硅水凝胶的疏水，从而形成表面积在约100m 2 / g范围内的疏水性硅胶 在干燥状态下测量为750m 2 / g。 在优选的方法中，将疏水性二氧化硅水凝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为疏水性二氧化硅有机凝胶。
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公开(公告)号：US5750610A
公开(公告)日：1998-05-12
申请号：US805102
申请日：1997-02-24
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。
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