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    • 31. 发明授权
    • Treatment of a composition comprising a trimethylolalkane bis-monolinear formal
    • 包含三羟甲基烷烃双 - 单变体形式的组合物的处理
    • US06316679B1
    • 2001-11-13
    • US09579743
    • 2000-05-26
    • Carolyn SuppleeJerry A. BroussardTobin J. MarksWilliam E. SlinkardEdwards G. Zey
    • Carolyn SuppleeJerry A. BroussardTobin J. MarksWilliam E. SlinkardEdwards G. Zey
    • C07C2726
    • C07D319/06
    • A process for treating a composition containing a substantial proportion of trimethyflolpropane bis-monolinear formal (TMP-BMLF) or trimethylolethane bis-monolinear formal (TME-BMLF), e.g., a heavy ends residue obtained from the purification of a crude trimethylolpropane (TMP) or trimethylolethane (TME) product, wherein the composition is contacted at an elevated temperature with a strong acid catalyst, e.g., methanesulfonic acid, to produce a composition containing significantly increased amounts of TMP and trimethylolpropane monocyclic formal (TMP-MCF) or TME and trimethylolethane monocyclic formal (TME-MCF) respectively. Also disclosed is a process for reacting TMP-MCF or TME-MCF, either in substantially pure form or as present in the light ends overhead stream obtained in a finishing treatment of crude TMP or TME, with a monohydric or dihydric alcohol, e.g., ethylene glycol, in the presence of a strong acid catalyst to obtain additional TMP or TME and an acetal by-product, e.g., 1,3-dioxolane; and a process for directly reacting the TMP-BMLF or TME-BMLF present in a composition, e.g., the heavy ends residue obtained in the purification of TMP or TME, with a monohydric or dihydric alcohol, e.g., ethylene glycol, in the presence of a strong acid to obtain additional TMP or TME and an acetal by-product, e.g., 1,3-dioxolane.
    • 一种用于处理含有大量比例的三甲基十四烷丙基双 - 单体形式(TMP-BMLF)或三羟甲基乙烷双 - 单体形式(TME-BMLF)的组合物的方法,例如从纯化三羟甲基丙烷(TMP)得到的重馏分残余物, 或三羟甲基乙烷(TME)产物,其中组合物在高温下与强酸催化剂(例如甲磺酸)接触以产生含有显着增加量的TMP和三羟甲基丙烷单环形式(TMP-MCF)或TME和三羟甲基乙烷的组合物 单体形式(TME-MCF)。 还公开了一种使TMP-MCF或TME-MCF以基本纯的形式或存在于在粗TMP或TME的整理处理中获得的轻馏分塔顶馏出物与一元或二元醇(例如乙烯 乙二醇,在强酸催化剂存在下,得到另外的TMP或TME和缩醛副产物,例如1,3-二氧戊环; 以及将组合物中存在的TMP-BMLF或TME-BMLF直接反应的方法,例如在TMP或TME纯化中获得的重馏分残基与一元或二元醇(例如乙二醇)在存在下 强酸以获得额外的TMP或TME和缩醛副产物,例如1,3-二氧戊环。
    • 37. 发明授权
    • Homogeneous catalysts for stereoregular olefin polymerization
    • 用于立体规则烯烃聚合的均相催化剂
    • US5330948A
    • 1994-07-19
    • US860784
    • 1992-03-31
    • Tobin J. MarksMoris S. EisenMichael A. Giardello
    • Tobin J. MarksMoris S. EisenMichael A. Giardello
    • C08F4/16C08F4/52C08F4/64C08F4/76C08F20/12C08F4/62C08F4/622C08F4/642C08F4/68
    • C08F20/12C08F4/52C08F4/76Y10S526/943
    • The synthesis, and use as precatalysts of chiral organozirconium complexes for olefin polymerization are disclosed, having the structure (C.sub.5 R'.sub.4-x R*.sub.x) A (C.sub.5 R".sub.4-y R'".sub.y) M Q.sub.p, where x and y represent the number of unsubstituted locations on the cyclopentadienyl ring; R', R", R'", and R* represent substituted and unsubstituted alkyl groups having 1-30 carbon atoms and R* is a chiral ligand; A is a fragment containing a Group 13, 14, 15, or 16 element of the Periodic Table; M is a Group 3, 4, or 5 metal of the Periodic Table; and Q is a hydrocarbyl radical, or halogen radical, with 3.ltoreq.p.ltoreq.o. Related complexes may be prepared by alkylation of the corresponding dichorides. In the presence of methylalumoxane or triarylborane cocatalysts, these complexes form "cation-like" species which are highly active for olefin polymerization. In combination with a Lewis acid cocatalyst, propylene or other .alpha.-olefin polymerization can be effected with very high efficiency and isospecificity.
    • 公开了具有结构(C5R'4-xR * x)A(C5R''4-yR“'y)M Qp的合成和用作烯烃聚合的手性有机锆络合物的预催化剂,其中x和y表示 环戊二烯基环上未取代位置的数目; R',R“,R”'和R *表示取代和未取代的具有1-30个碳原子的烷基,R *是手性配体; A是含有元素周期表第13,14,15或16族元素的片段; M是元素周期表的第3,4或5族金属; 且Q为烃基或卤素基团,其中3≤n≤0。 相关络合物可以通过相应的二氯化碳的烷基化来制备。 在甲基铝氧烷或三芳基硼烷助催化剂存在下,这些络合物形成对于烯烃聚合具有高活性的“阳离子”物质。 与路易斯酸助催化剂组合,丙烯或其它α-烯烃聚合可以以非常高的效率和特异性实现。