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    Ultra high molecular weight polyethylene fractions having narrow molecular weight distributions and methods of making and using the same
    6.
    发明授权
    Ultra high molecular weight polyethylene fractions having narrow molecular weight distributions and methods of making and using the same 有权
    具有窄分子量分布的超高分子量聚乙烯级分及其制备和使用方法

    公开(公告)号：US07691633B2

    公开(公告)日：2010-04-06

    申请号：US11766518

    申请日：2007-06-21

    申请人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

    发明人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

    IPC分类号： C08F210/02 ,  G01N30/02 ,  C08F6/12

    CPC分类号： C08F6/04 ,  C08F110/02 ,  Y10T436/10 ,  C08L23/04 ,  C08F2500/01 ,  C08F2500/03

    摘要： Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.

    摘要翻译： 可以制备聚合物级分，例如具有小于约2.3的PDI和大于约1,000,000g / mol的Mw，3,000,000g / mol或6,000,000g / mol的聚乙烯级分。 通过首先将母体聚合物溶解在相对良好的溶剂中，将这样的聚乙烯部分与UHMWPE母体聚合物分离。 选择用于这种溶解的条件以降低母体聚合物的降解。 将所得的母体溶液输送到其中设置有支持物的分馏塔。 然后分馏塔在有效地在包含所需聚乙烯部分的载体上形成沉淀物的条件下操作。 然后可以通过将溶剂/非溶剂混合物重复置换到柱中以溶解聚乙烯部分，从分馏塔中回收聚乙烯部分。 溶剂和非溶剂的相对浓度基于聚乙烯母体聚合物的溶剂梯度分布。

    Ultra high molecular weight polyethylene fractions having narrow molecular weight distributions and methods of making and using the same
    7.
    发明授权
    Ultra high molecular weight polyethylene fractions having narrow molecular weight distributions and methods of making and using the same 有权
    具有窄分子量分布的超高分子量聚乙烯级分及其制备和使用方法

    公开(公告)号：US07241620B2

    公开(公告)日：2007-07-10

    申请号：US10754373

    申请日：2004-01-09

    申请人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

    发明人： Chung C. Tso ,  Melvin Hildebrand ,  Paul J. DesLauriers ,  Youlu Yu

    IPC分类号： G01N30/02 ,  C08F6/12

    CPC分类号： C08F6/04 ,  C08F110/02 ,  Y10T436/10 ,  C08L23/04 ,  C08F2500/01 ,  C08F2500/03

    摘要： Polymer fractions such as polyethylene fractions can be produced that have a PDI less than about 2.3 and a Mw greater than about 1,000,000 g/mol, 3,000,000 g/mol, or 6,000,000 g/mol. Such polyethylene fractions are separated from a UHMWPE parent polymer by first dissolving the parent polymer in a relatively good solvent. The conditions employed for such dissolution are selected to reduce the degradation of the parent polymer. The resulting parent solution is transported into a fractionation column in which a support is disposed. The fractionation column is thereafter operated at conditions effective to form a precipitate on the support comprising the desired polyethylene fraction. The polyethylene fraction may then be recovered from the fractionation column by repeatedly displacing a solvent/non-solvent mixture into the column to dissolve the polyethylene fraction. The relative concentrations of the solvent and the non-solvent are based on a solvent gradient profile of the polyethylene parent polymer.

    摘要翻译： 可以制备聚合物级分例如聚乙烯级分，其具有小于约2.3的PDI和大于约1,000,000g / mol，3,000,000g / mol或6,000,000g / mol的M max。 通过首先将母体聚合物溶解在相对良好的溶剂中，将这样的聚乙烯部分与UHMWPE母体聚合物分离。 选择用于这种溶解的条件以降低母体聚合物的降解。 将所得的母体溶液输送到其中设置有支持物的分馏塔。 然后分馏塔在有效地在包含所需聚乙烯部分的载体上形成沉淀物的条件下操作。 然后可以通过将溶剂/非溶剂混合物重复置换到柱中以溶解聚乙烯部分，从分馏塔中回收聚乙烯部分。 溶剂和非溶剂的相对浓度基于聚乙烯母体聚合物的溶剂梯度分布。

    Benzylic oxidation and catalyst therefor
    9.
    发明授权
    Benzylic oxidation and catalyst therefor 失效
    苄氧化及其催化剂

    公开(公告)号：US5280001A

    公开(公告)日：1994-01-18

    申请号：US956925

    申请日：1992-10-05

    申请人： Chung C. Tso ,  Robert L. Wynn

    发明人： Chung C. Tso ,  Robert L. Wynn

    IPC分类号： C07C67/00 ,  B01J31/04

    CPC分类号： C07C67/00

    摘要： Oxidation of alkylaromatics having a benzylic hydrogen atom is catalyzed by a catalyst comprising a palladium salt, a metal persulfate, a third metal salt, and a tin salt in a carboxylic acid for a period of time sufficient to convert the alkylaromatics to their corresponding oxidized derivatives. The catalyst is prepared by preheating the palladium salt and the metal persulfate at a temperature sufficient to provide the desired catalytic activity followed by addition of the third metal salt and the tin salt.

    摘要翻译： 具有苄基氢原子的烷基芳族化合物的氧化通过包含钯盐，金属过硫酸盐，第三金属盐和锡盐的催化剂在羧酸中催化足以将烷基芳​​族化合物转化成其相应的氧化衍生物的时间 。 通过在足以提供所需催化活性的温度下预热钯盐和金属过硫酸盐，然后加入第三金属盐和锡盐来制备催化剂。

    Preparation of 2,5-dimethylhexane-2,5-dihydroperoxide and derivatives thereof
    10.
    发明授权
    Preparation of 2,5-dimethylhexane-2,5-dihydroperoxide and derivatives thereof 失效
    2,5-二甲基己烷-2,5-二氢过氧化物及其衍生物的制备

    公开(公告)号：US5210320A

    公开(公告)日：1993-05-11

    申请号：US930588

    申请日：1992-08-17

    申请人： Chung C. Tso ,  Joe W. Ryker

    发明人： Chung C. Tso ,  Joe W. Ryker

    IPC分类号： C07C409/04 ,  C07C409/16

    CPC分类号： C07C409/04 ,  C07C407/00 ,  C07C409/16

    摘要： A one-step process for preparing 2,5-dimethylhexane-2,5-dihydroperoxide and its alkyl derivatives comprises: (1) adding sulfuric acid to a 60-70% hydrogen peroxide solution to form a first reaction mixture where the first mixture is controlled at a temperature in the range of from about -10.degree. C. to about 10.degree. C.; (2) adding 2,5-dimethyl-2,5-dihydroxy hexane to the mixture held at a temperature in the range of from about -10.degree. C. to about 10.degree. C. or lower to form a second reaction mixture and maintaining the second mixture at a temperature in the range of from about 20.degree. C. to about 50.degree. C. for about 5 minutes to about 5 hours to form a slurry containing the solid product of 2,5-dimethylhexane-2,5-dihydroperoxide, unreacted reactants and impurities; (3) lowering the temperature of the slurry to the range of from about -10.degree. C. to about 10.degree. C.; (4) removing unreacted reactants and impurities from the solid product and optionally, washing the solid product; and (5) adding sulfated alkyl alcohol, which is prepared by adding the alkyl alcohol to sulfuric acid, to the solid product to form a third reaction mixture and maintaining the third mixture at about 30.degree. C. to about 60.degree. C. for about 1 to about 5 hours to prepare the alkyl derivatives.

    摘要翻译： 制备2,5-二甲基己烷-2,5-二氢过氧化物及其烷基衍生物的一步法包括：（1）向60-70％过氧化氢溶液中加入硫酸以形成第一反应混合物，其中第一混合物为 控制在约-10℃至约10℃的温度范围内。 （2）向保持在约-10℃至约10℃或更低温度范围的混合物中加入2,5-二甲基-2,5-二羟基己烷以形成第二反应混合物并保持 第二混合物在约20℃至约50℃的温度下进行约5分钟至约5小时，以形成含有2,5-二甲基己烷-2,5-二氢过氧化物的固体产物的浆液 ，未反应的反应物和杂质; （3）将浆料的温度降低至约-10℃至约10℃的范围。 （4）从固体产物中除去未反应的反应物和杂质，任选地洗涤固体产物; 和（5）将通过将烷基醇加入硫酸制备的硫酸化烷基醇加入到固体产物中以形成第三反应混合物并将第三混合物保持在约30℃至约60℃约约 1至约5小时以制备烷基衍生物。