Preparation of cyclopentenones
    6.
    发明授权
    Preparation of cyclopentenones 失效
    环戊烯酮的制备

    公开(公告)号:US06828464B2

    公开(公告)日:2004-12-07

    申请号:US10718795

    申请日:2003-11-24

    CPC classification number: B01J23/04 C07C45/48 Y02P20/582 C07C49/597

    Abstract: The present invention provides a process for preparing 2-cyclopentenones of the general formula: where R1 to R4 are each hydrogen atoms or are alkyl or alkenyl radicals having from 1 to 12 carbon atoms, cycloalkyl or cycloalkenyl radicals having from 5 to 7 carbon atoms, aralkylene or aryl radicals, by converting hexenedioic acids and/or their esters of the general formulae where R1 to R4 are each as defined above and R5 and R6 are each hydrogen atoms or are alkyl radicals having from 1 to 12 carbon atoms, cycloalkyl radicals having 5 or 6 carbon atoms, aralkyl or aryl radicals, at temperatures of from 150 to 450° C., over solid, oxidic catalysts, wherein the catalysts on an oxidic support material comprise from 0.01 to 5% by weight of at least one alkali metal oxide.

    Abstract translation: 本发明提供一种制备以下通式的2-环戊烯酮的方法:其中R 1至R 4各自为氢原子或具有1至12个碳原子的烷基或烯基,环烷基或环烯基具有 5-7个碳原子的亚芳基或芳基,通过将通式R 1至R 4的通式所示的己烯二酸和/或它们的酯各自如上所定义,R 5和R 6各自为 氢原子或具有1至12个碳原子的烷基,具有5或6个碳原子的环烷基,芳烷基或芳基,在150-450℃的温度下,在固体,氧化催化剂上,其中催化剂在 氧化载体材料包含0.01至5重量%的至少一种碱金属氧化物。

    Process for the preparation of alkanolamines having improved color quality
    7.
    发明授权
    Process for the preparation of alkanolamines having improved color quality 有权
    具有改善颜色质量的烷醇胺的制备方法

    公开(公告)号:US06291715B1

    公开(公告)日:2001-09-18

    申请号:US09643724

    申请日:2000-08-23

    CPC classification number: C07C213/10 C07C215/08 C07C215/10 C07C215/14

    Abstract: Preparation of alkanolamines having improved color quality by treating the alkanolamine with hydrogen in the presence of a hydrogenation catalyst at elevated temperature, by using, as hydrogenation catalyst, a heterogeneous catalyst comprising Re, Ru, Rh, Pd, Os, Ir, Pt and/or Ag and a support material chosen from the group consisting of activated carbon, alpha-aluminum oxide, zirconium dioxide and titanium dioxide, where the catalyst, in the case of activated carbon as support material, has a cutting hardness of at least 10 N, a side crushing strength of at least 30 N or a compressive strength of at least 25 N.

    Abstract translation: 通过在氢化催化剂存在下,在升高的温度下,用氢处理链烷醇胺,通过使用氢化催化剂,制备包含Re,Ru,Rh,Pd,Os,Ir,Pt和/ 或Ag和选自活性炭,α-氧化铝,二氧化锆和二氧化钛的载体材料,其中在活性炭作为载体材料的情况下,催化剂具有至少10N的切割硬度, 至少30N的侧面抗压强度或至少25N的抗压强度。

    Use of urea derivatives as accelerators for epoxy resins
    10.
    发明申请
    Use of urea derivatives as accelerators for epoxy resins 有权
    使用脲衍生物作为环氧树脂的促进剂

    公开(公告)号:US20070027274A1

    公开(公告)日:2007-02-01

    申请号:US10558160

    申请日:2004-05-28

    CPC classification number: C08G59/4021

    Abstract: A description is given of the use of asymmetrically substituted urea derivatives of the general formula (I) where R1 and R2 each independently are a linear or branched aliphatic hydrocarbon radical having 1 to 4 carbon atoms as accelerators in combination with dicyandiamide as latent hardener for epoxy resin systems based on unhalogenated or halogenated bisphenols of type A or F and also based on resorcinol or tetrakisphenylolethane. The advangages of the inventively proposed accelerator/hardener combination are, for example, the excellent reactivity and very good storage stability. Moreover, the mechanical properties of the resins cured accordingly are likewise outstanding.

    Abstract translation: 给出了使用通式(I)的不对称取代的脲衍生物,其中R 1和R 2各自独立地是具有直链或支链的脂族烃基,其具有 1至4个碳原子作为加速剂与双氰胺组合,作为基于A或F的非卤化或卤化双酚的环氧树脂体系的潜在硬化剂,也基于间苯二酚或四苯基乙基乙烷。 本发明提出的加速剂/固化剂组合的优点是例如优异的反应性和非常好的储存稳定性。 此外,相应地固化的树脂的机械性能同样突出。

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