Continuous preparation of ethylbenzene in a heterogeneous-phase reaction
    2.
    发明授权
    Continuous preparation of ethylbenzene in a heterogeneous-phase reaction 失效
    在异相反应中连续制备乙苯

    公开(公告)号:US4431854A

    公开(公告)日:1984-02-14

    申请号:US305848

    申请日:1981-09-25

    IPC分类号: C07C2/68 C07C2/70 C07C15/073

    摘要: A process for the continuous preparation of ethylbenzene in a heterogeneous-phase reaction by alkylating benzene with ethylene in the presence of a catalyst based on a complex organic aluminum chloride compound and a co-catalyst at an elevated temperature and elevated pressure, with a residence time of from 5 to 60 minutes in one or more reaction zones, the reaction mixture, after completion of the reaction, being fed into a pressure vessel and vigorously mixed therein for from 20 to 60 minutes at from 120.degree. to 160.degree. C.

    摘要翻译: 一种在异相反应中连续制备乙苯的方法,该方法是在基于复合有机氯化铝化合物和助催化剂的催化剂存在下,用乙烯烷基化,在高温和高压下,停留时间 在一个或多个反应区中为5至60分钟,反应混合物在反应完成后进料至压力容器中并在120至160℃剧烈混合20至60分钟。

    4-acylaminopiperidin-N-oxyle
    3.
    发明授权
    4-acylaminopiperidin-N-oxyle 失效
    4-酰基氨基哌啶-N-氧基

    公开(公告)号:US5922244A

    公开(公告)日:1999-07-13

    申请号:US913613

    申请日:1997-09-22

    摘要: 4-Acylaminopiperidine N-oxides IaA.sup.1 B.sup.1 (Ia)where A.sup.1 is hydrogen or an organic radical and B.sup.1 is a radical IIa ##STR1## where R.sup.1 -R.sup.4 are each C.sub.1 -C.sub.4 -alkyl and R.sup.1 and R.sup.2, on the one hand, and R.sup.3 and R.sup.4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring,R.sup.5 is H or C.sub.1 14 C.sub.4 -alkyl andR.sup.6 is H or C.sub.1 -C.sub.18 -alkyl,are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

    摘要翻译: PCT No.PCT / EP96 / 01122 Sec。 371日期:1997年9月22日 102(e)1997年9月22日PCT 1996年3月15日PCT公布。 公开号WO96 / 29311 PCT 日期1964年9月26日 - 酰氨基哌啶N-氧化物IaA1B1(Ia)其中A1是氢或有机基团,B1是其中R1-R4各自为C1-C4-烷基的基团IIa,另一方面,R1和R2, 另一方面,R3和R4还可以键合形成5元或6元环,R5是H或C114 C4-烷基,R6是H或C1-C18-烷基,用于稳定有机物 抵抗自由基的有害影响的材料,特别是在进行自由基聚合的单体的蒸馏中,特别是苯乙烯。