Preparation of olefins from methanol and/or dimethyl ether
    12.
    发明授权
    Preparation of olefins from methanol and/or dimethyl ether 失效
    从甲醇和/或二甲醚制备烯烃

    公开(公告)号:US4433188A

    公开(公告)日:1984-02-21

    申请号:US413814

    申请日:1982-09-01

    IPC分类号: C07C1/20

    摘要: A process for the preparation of lower olefins from methanol or dimethyl ether by catalytic conversion at from 300.degree. to 550.degree. C. in two stages over borosilicate zeolites, wherein C.sub.2 -C.sub.4 -olefins and C.sub.1 -C.sub.4 -paraffins are removed after the first reaction stage, the C.sub.5.sup.+ hydrocarbons are passed to the second reaction stage, the aromatics are removed from the reaction product of the second stage and the remaining reaction products are recycled. The advantage of this process is an improvement in the yield of olefins.

    摘要翻译: 一种从甲醇或二甲醚中制备低级烯烃的方法,通过在三相硼酸盐沸石中分三步骤催化转化,分三次反应,其中在第一次反应后除去C 2 -C 4 - 烯烃和C 1 -C 4 - 链烷烃 阶段,将C5 +烃送至第二反应阶段,将芳族化合物从第二阶段的反应产物中除去,剩余的反应产物被再循环。 该方法的优点是烯烃产率的提高。

    Obtaining but-2-enes from C.sub.4 -hydrocarbon mixtures which contain
but-1-ene and may or may not contain but-2-enes
    14.
    发明授权
    Obtaining but-2-enes from C.sub.4 -hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes 失效
    从含有1-丁烯的C4-烃混合物中获得丁-2-烯,并且可以含有或不含有2-烯的

    公开(公告)号:US4777322A

    公开(公告)日:1988-10-11

    申请号:US759234

    申请日:1985-07-26

    摘要: But-2-enes are obtained from C.sub.4 -hydrocarbon mixtures which contain but-1-ene and may or may not contain but-2-enes by catalytic isomerization of the but-1-ene to but-2-enes in an isomerization zone at elevated temperatures by a process in which the isomerization is carried out in combination with a distillative separation zone, the said hydrocarbon mixture being fed to the isomerization zone and/or distillative separation zone, the isomerization mixture obtained from the isomerization zone is passed into the distillative separation zone, a but-1-ene-containing fraction is removed above the lower third of the distillative separation zone and passed into the isomerization zone, and the but-2-enes or a fraction containing these are or is removed in the lower third of the distillative separation zone.

    摘要翻译: 丁-2-烯通过含有丁-1-烯的C 4烃混合物获得,并且可以通过在异构化区中丁-1-烯与丁-2-烯的催化异构化而含有或不含有2-烯 在升高的温度下,通过与蒸馏分离区组合进行异构化的方法,将所述烃混合物进料到异构化区和/或蒸馏分离区,将从异构化区获得的异构化混合物送入 蒸馏分离区,含有1-丁烯的馏分在蒸馏分离区的三分之一以下被除去并进入异构化区,并且将2-烯烃或其中含有的馏分在下部 三分之一的蒸馏分离区。

    Preparation of ketones
    20.
    发明授权
    Preparation of ketones 失效
    酮的制备

    公开(公告)号:US4950763A

    公开(公告)日:1990-08-21

    申请号:US381469

    申请日:1989-07-18

    摘要: Ketones of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 independently of one another are each alkyl, cycyloalkyl, arylalkyl, aryl or hetaryl, and one or more of the radicals R.sup.1 and R.sup.2 carry one or more hydrogen atoms on the .alpha.-carbon atom, are prepared by reacting two carboxylic acids of the general formulae (IIa/IIb), R.sup.1 --COOH (IIa) and R.sup.2 --COOH (IIb) or by reacting a carboxylic acid R.sup.1 --COOH (IIa) and a ketone ##STR2## or by reacting a mixture of IIa, IIb and Ib, in the gas phase in the presence of a catalyst, by a process in which a catalyst is used whose active material contains at least 50% by weight of titanium dioxide having a specific surface area greater than 10 m.sup.2 /g.0.

    摘要翻译: 其中R 1和R 2彼此独立地为烷基,氰基烷基,芳基烷基,芳基或杂芳基的通式(I)的酮,其中R 1和R 2中的一个或多个携带一个或多个氢原子 通过使通式(IIa / IIb),R1-COOH(IIa)和R2-COOH(IIb)的两种羧酸反应或通过使羧酸R1-COOH(IIa)和 酮(Ib)或IIa,IIb和Ib的混合物在气相中,在催化剂存在下,通过使用活性物质含有至少50重量%的催化剂的方法 的比表面积大于10m 2 / g的二氧化钛。