Process for the production of dienes from aldehydes
    1.
    发明授权
    Process for the production of dienes from aldehydes 失效
    从醛生产二烯的方法

    公开(公告)号:US4524233A

    公开(公告)日:1985-06-18

    申请号:US649236

    申请日:1984-09-10

    摘要: This invention is directed to a process for the conversion of an aldehyde to a diolefin comprising contacting an aldehyde of 4 to 6 carbon atoms in the vapor phase at a temperature of 300.degree. to 400.degree. C. with a catalyst comprising boron phosphate wherein the initial molar ratio of phosphorous (P) to boron (B) (P/B) is less than 1.0 but greater than 0.6 which is in intimate admixture with from 0.1 to 10 weight percent graphite. More specifically, this invention is concerned with a process for the catalytic dehydration of 2-methylbutanal (2MBA) to isoprene in the vapor phase with a boron phosphate catalyst wherein the improvement comprises the use of a catalyst with a molar ratio of P/B of less than 1.0 but greater than 0.6 which contains from 0.1 to 10 weight percent graphite and 0 to 10 mole percent, based on moles of boron, of ammonia or an amine selected from the group consisting of mono-, di- and/or tri- alkyl amines of 1 to 10 carbon atoms.

    摘要翻译: 本发明涉及一种将醛转化为二烯烃的方法,其包括在300-400℃的温度下,将气相中4至6个碳原子的羰基与包含磷酸二氢钾的催化剂接触,其中初始 磷(P)与硼(B)的摩尔比(P / B)小于1.0但大于0.6,与0.1至10重量%的石墨紧密混合。 更具体地说,本发明涉及使用磷酸三乙酯催化剂在气相中将2-甲基丁醛(2MBA)催化脱水成异戊二烯的方法,其中改进包括使用摩尔比P / B为 小于1.0但大于0.6,其含有0.1至10重量百分比的石墨和0至10摩尔%,以硼的摩尔数为基准,氨或选自单 - ,二 - 和/或三 - 1至10个碳原子的烷基胺。

    Open-pentadienyl metallocenes, precursors thereof and polymerization catalysts therefrom
    5.
    发明授权
    Open-pentadienyl metallocenes, precursors thereof and polymerization catalysts therefrom 失效
    开戊二烯基金属茂,其前体和聚合催化剂

    公开(公告)号:US06403772B1

    公开(公告)日:2002-06-11

    申请号:US09029801

    申请日:1998-03-06

    IPC分类号: C07F708

    摘要: New metallocene compounds are described where the ligand contains at least one open-pentadienyl containing radical characterized by a cyclic or acyclic, six &pgr; electron, delocalized, five atomic center structure. These metallocenes can advantageously be used in catalyst systems for the polymerization of olefins to generate a wide variety of different polymers including HDPE, LLDPE, ethylenelpropylene/(diene) elastomers, tactiospecific C3+&agr;-olefin polymers, intimate mixture thereof and the like.

    摘要翻译: 描述了新的茂金属化合物,其中配体含有至少一个含有开环戊二烯基的基团,其特征在于环状或非环状六个π电子,离域的五原子中心结构。 这些茂金属可以有利地用于烯烃聚合的催化剂体系中,以生成各种不同的聚合物,包括HDPE,LLDPE,乙烯 - 丙烯/(二烯)弹性体,触媒特异性C 3+α-烯烃聚合物及其紧密混合物等。

    Metal oxide deactivation of natural rubber fatty acids
    6.
    发明授权
    Metal oxide deactivation of natural rubber fatty acids 失效
    天然橡胶脂肪酸的金属氧化物失活

    公开(公告)号:US5254616A

    公开(公告)日:1993-10-19

    申请号:US720047

    申请日:1991-06-24

    IPC分类号: C08K3/22 C08K5/09

    CPC分类号: C08K3/22 C08K5/09

    摘要: Fatty acids commonly found in bulk elastomers such as natural rubber and certain synthetic polymers are deactivated by adding a metal oxide to the masterbatch stage where the metal oxide is selected from the group consisting of aluminum oxide, calcium oxide or mixtures thereof. Amounts range from about 0.1 phr to about 5 phr of calcium oxide, about 0.1 to about 7 phr of aluminum oxide, or about 0.5 to about 5 phr of aluminum oxide plus about 0.05 to 1 phr of calcium oxide. Deactivation of fatty acids improves tack and cure properties.

    摘要翻译: 通常在体积弹性体如天然橡胶和某些合成聚合物中发现的脂肪酸通过向母料级加入金属氧化物而失活,其中金属氧化物选自氧化铝,氧化钙或其混合物。 量为约0.1phr至约5phr氧化钙,约0.1至约7phr氧化铝,或约0.5至约5phr的氧化铝加上约0.05至1phr的氧化钙。 脂肪酸的失活可改善粘性和固化性能。

    Open-pentadienyl metallocenen ligands, polymerization catalysts/catalyst
precursors and polymers therefrom
    7.
    发明授权
    Open-pentadienyl metallocenen ligands, polymerization catalysts/catalyst precursors and polymers therefrom 失效
    开式戊二烯基金属茂配体,聚合催化剂/催化剂前体及其聚合物

    公开(公告)号:US6069237A

    公开(公告)日:2000-05-30

    申请号:US526376

    申请日:1995-09-11

    摘要: New metallocene ligand systems and catalysts/catalyst precursors are described where the ligand system contains at least one open-pentadienyl ligand characterized by an acyclic six .pi. electron delocalized, five atomic center structure. The open pentadienyl ligand is bonded to either another pentadienyl ligand or a Cp ligand by a bridging group. The metal is from group 3-5 or the Lanthanides. These metallocene catalysts/catalyst precursors optionally in combination with co-catalysts can be used to generate a wide variety of different polymer types including HDPE, LLDPE, LHDPE, ethylene/propylene elastomers, tactiospecific C3+ .alpha.-olefins, intimate mixture thereof and the like.

    摘要翻译: 描述了新的茂金属配体体系和催化剂/催化剂前体,其中配体体系含有至少一个开环戊二烯基配位体,其特征在于无环六π电子离域,五原子中心结构。 开放的戊二烯基配体通过桥连基团键合到另一个戊二烯基配体或Cp配体上。 金属来自3-5族或镧系元素。 任选与助催化剂组合的这些茂金属催化剂/催化剂前体可用于产生各种不同的聚合物类型,包括HDPE,LLDPE,LHDPE,乙烯/丙烯弹性体,触媒特异性C 3+α-烯烃,其紧密混合物等。