Process for treating silica with alumoxane
    2.
    发明授权
    Process for treating silica with alumoxane 失效
    用铝氧烷处理二氧化硅的方法

    公开(公告)号:US06211109B1

    公开(公告)日:2001-04-03

    申请号:US09085922

    申请日:1998-05-28

    IPC分类号: B01J3112

    摘要: The invention provides a process for commercial production of syndiotactic polyolefins using a metallocene catalyst supported on silica treated with MAO. The invention includes contacting the supported metallocene catalyst with an aluminum alkyl and aging the catalyst prior to polymerization. In addition, the catalyst is prepolymerized in a tubular reactor prior to being introduced into the polymerization reaction zone. The treated silica is produced by removing water to a level of 0.5-1.08%, slurrying in a nonpolar solvent, adding an alumoxane, heating to reflux, cooling the slurry, and separating the solid product.

    摘要翻译: 本发明提供了使用负载在用MAO处理的二氧化硅上的茂金属催化剂来商业生产间同立构聚烯烃的方法。 本发明包括使负载的茂金属催化剂与烷基铝接触并在聚合之前使催化剂老化。 此外,催化剂在引入聚合反应区之前在管式反应器中预聚合。 处理的二氧化硅通过将水除去至0.5-1.08%的水平,在非极性溶剂中成浆,加入铝氧烷,加热回流,冷却浆料,分离固体产物。

    WELLBORE SERVICING COMPOSITIONS AND METHODS OF USING SAME
    3.
    发明申请
    WELLBORE SERVICING COMPOSITIONS AND METHODS OF USING SAME 失效
    井筒维修组合物及其使用方法

    公开(公告)号:US20080182764A1

    公开(公告)日:2008-07-31

    申请号:US11669060

    申请日:2007-01-30

    IPC分类号: C09K3/00

    摘要: A method of servicing a wellbore in contact with a subterranean formation, comprising placing into a wellbore a composition comprising a calcium aluminate cement and a polyvalent cation-containing compound, and allowing the composition to set. A method of increasing the thickening time of a calcium aluminate cement comprising contacting the calcium aluminate cement with a polyvalent cation-containing compound. A method of adjusting the thickening time of a calcium aluminate cement comprising contacting the calcium aluminate cement with a polyvalent cation-containing compound and at least one other set modifier.

    摘要翻译: 一种维护与地层接触的井筒​​的方法,包括将包含铝酸钙水泥和多价阳离子的化合物的组合物放入井筒中,并使组合物凝固。 一种增加铝酸钙水泥的增稠时间的方法,包括使铝酸钙水泥与多价阳离子化合物接触。 一种调节铝酸钙胶泥的增稠时间的方法,其包括使铝酸钙水泥与含有多价阳离子的化合物和至少一种其它组合改性剂接触。

    Method for controlling the melting points and molecular weights of
syndiotactic polyolefins using metallocene catalyst systems
    4.
    发明授权
    Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems 失效
    使用茂金属催化剂体系控制间同立构聚烯烃的熔点和分子量的方法

    公开(公告)号:US5688735A

    公开(公告)日:1997-11-18

    申请号:US471055

    申请日:1995-06-06

    摘要: This invention is for a method for varying the melting points and molecular weights of syndiotactic polyolefins by using metallocene catalysts with substituents on the aryl rings of a fluorene ligand in certain positions. Electron donating substituents, for example, dialkylamino, halogen, and alkoxy groups, when present on fluorene at C1, C2, C3 or C2 and C7 render the catalyst less active and decrease the polymer molecular weight. Electron donating substituents, such as alkyl, dialkylamino, halogen or alkoxy, at C4 not only increased the catalyst efficiency but also dramatically increased the polymer molecular weight. Bulky hydrocarbyl substituents, such as alkyl, cycloalkyl and aryl groups, at C2 and C7 increase the melting point. Bulky substituents such as hydrocarbyl groups like alkyl, cycloalkyl, aryl, alkoxy and dialkylamino groups etc., at C4/C5 decrease the melting point. When multiple substituents are present on fluorene, their effects are additive.

    摘要翻译: 本发明是通过在某些位置使用在芴配体的芳环上具有取代基的金属茂催化剂来改变间规聚烯烃的熔点和分子量的方法。 当C 1,C 2,C 3或C 2和C 7存在于芴上时,给电子取代基例如二烷基氨基,卤素和烷氧基使得催化剂活性降低并降低聚合物分子量。 C4中的电子给体取代基如烷基,二烷基氨基,卤素或烷氧基不仅提高了催化剂效率,而且显着提高了聚合物分子量。 C2和C7处的大量烃基取代基如烷基,环烷基和芳基增加了熔点。 在C4 / C5时,大量取代基如烃基如烷基,环烷基,芳基,烷氧基和二烷基氨基等降低了熔点。 当芴上存在多个取代基时,它们的作用是添加剂。

    Method for controlling the melting points and molecular weights of
syndiotactic polyolefins using metallocene catalyst systems
    5.
    发明授权
    Method for controlling the melting points and molecular weights of syndiotactic polyolefins using metallocene catalyst systems 失效
    使用茂金属催化剂体系控制间同立构聚烯烃的熔点和分子量的方法

    公开(公告)号:US5710222A

    公开(公告)日:1998-01-20

    申请号:US903058

    申请日:1992-06-22

    摘要: This invention is for a method for varying the melting points and molecular weights of syndiotactic polyolefins by using metallocene catalysts with substituents on the aryl rings of a fluorene ligand in certain positions. Electron donating substituents, for example, dialkylamino, halogen, and alkoxy groups, when present on fluorene at C1, C2, C3 or C2 and C7 render the catalyst less active and decrease the polymer molecular weight. Electron donating substituents, such as alkyl, dialkylamino, halogen or alkoxy, at C4 not only increased the catalyst efficiency but also dramatically increased the polymer molecular weight. Bulky hydrocarbyl substituents, such as alkyl, cyaloalkyl and aryl groups, at C2 and C7 increase the melting point. Bulky substituents such as hydrocarbyl groups like alkyl, cycloalkyl, aryl, alkoxy and dialkylamino groups etc., at C4/C5 decrease the melting point. When multiple substituents are present on fluorene, their effects are additive.

    摘要翻译: 本发明是通过在某些位置使用在芴配体的芳环上具有取代基的金属茂催化剂来改变间规聚烯烃的熔点和分子量的方法。 当C 1,C 2,C 3或C 2和C 7存在于芴上时,给电子取代基例如二烷基氨基,卤素和烷氧基使得催化剂活性降低并降低聚合物分子量。 C4中的电子给体取代基如烷基,二烷基氨基,卤素或烷氧基不仅提高了催化剂效率,而且显着提高了聚合物分子量。 C 2和C 7上的大量烃基取代基如烷基,芳烷基和芳基增加了熔点。 在C4 / C5时,大量取代基如烃基如烷基,环烷基,芳基,烷氧基和二烷基氨基等降低了熔点。 当芴上存在多个取代基时,它们的作用是添加剂。

    Wellbore servicing compositions and methods of using same
    6.
    发明授权
    Wellbore servicing compositions and methods of using same 失效
    Wellbore维修组合物及其使用方法

    公开(公告)号:US08685901B2

    公开(公告)日:2014-04-01

    申请号:US11669060

    申请日:2007-01-30

    IPC分类号: C09K8/74 C23F11/18 E21B33/13

    摘要: A method of servicing a wellbore in contact with a subterranean formation, comprising placing into a wellbore a composition comprising a calcium aluminate cement and a polyvalent cation-containing compound, and allowing the composition to set. A method of increasing the thickening time of a calcium aluminate cement comprising contacting the calcium aluminate cement with a polyvalent cation-containing compound. A method of adjusting the thickening time of a calcium aluminate cement comprising contacting the calcium aluminate cement with a polyvalent cation-containing compound and at least one other set modifier.

    摘要翻译: 一种维护与地层接触的井筒​​的方法,包括将包含铝酸钙水泥和多价阳离子的化合物的组合物放入井筒中,并使组合物凝固。 一种增加铝酸钙水泥的增稠时间的方法,包括使铝酸钙水泥与多价阳离子化合物接触。 一种调节铝酸钙胶泥的增稠时间的方法,其包括使铝酸钙水泥与含有多价阳离子的化合物和至少一种其它组合改性剂接触。