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29 条记录 (耗时 0.022 秒)

    Preparation of 3-methylpiperidine
    5.
    发明授权
    Preparation of 3-methylpiperidine 失效
    3-甲基哌啶的制备

    公开(公告)号：US4755604A

    公开(公告)日：1988-07-05

    申请号：US062408

    申请日：1987-06-15

    申请人： Gerhard Frank ,  Gerald Neubauer

    发明人： Gerhard Frank ,  Gerald Neubauer

    IPC分类号： C07D295/02 ,  B01J23/745 ,  C07B61/00 ,  C07D207/06 ,  C07D211/12 ,  C07D295/023 ,  C07D211/02

    CPC分类号： C07D295/023 ,  B01J23/745

    摘要： 5-Membered, 6-membered or 7-membered cyclic imines are prepared by hydrogenating a C.sub.2 -C.sub.4 -alkanedinitrile in the liquid phase, at from 180.degree. to 300.degree. C. and under superatmospheric pressure, in the presence of a catalyst, by a process in which an iron catalyst obtained by reduction of an iron oxide with hydrogen at .ltoreq.500.degree. C. is used.

    摘要翻译： 通过在液相中在180℃至300℃下和在超大气压下，在催化剂存在下，通过在催化剂存在下，通过将催化剂，C 2 -C 4烷基二醇， 使用通过在500℃下用氢还原氧化铁获得的铁催化剂的方法。

    Recovery of caprolactam from oligomers and/or polymers of caprolactam
    6.
    发明授权
    Recovery of caprolactam from oligomers and/or polymers of caprolactam 失效
    从己内酰胺的低聚物和/或聚合物中回收己内酰胺

    公开(公告)号：US5700358A

    公开(公告)日：1997-12-23

    申请号：US396623

    申请日：1995-03-01

    申请人： Hugo Fuchs ,  Josef Ritz ,  Gerald Neubauer

    发明人： Hugo Fuchs ,  Josef Ritz ,  Gerald Neubauer

    IPC分类号： C07D201/12 ,  C07D201/16 ,  C08G69/14 ,  C08G69/46 ,  B01D3/34

    CPC分类号： C07D201/12 ,  C07D201/16

    摘要： Caprolactam is recovered from oligomers and/or polymers of caprolactam by cleavage of oligomers and/or polymers of caprolactam and subsequent working up by distillation of the caprolactam obtained in the cleavage, by a process including (a) cleaving oligomers and/or polymers of caprolactam to obtain an aqueous reaction mixture which contains caprolactam, (b) removing water from the reaction mixture obtained under (a) to obtain a residue, (c) distilling the residue obtained under (b) in an acidic medium and (d) then distilling the distillate in an alkaline medium to obtain caprolactam, or (c') distilling the residue obtained under (b) in an alkaline medium and (d') then distilling the distillate in an acidic medium to obtain caprolactam.

    摘要翻译： 通过裂解己内酰胺的低聚物和/或聚己内酯并随后通过蒸馏在切割中获得的己内酰胺来处理己内酰胺从己内酰胺的低聚物和/或聚合物中回收己内酰胺，方法包括（a）裂解己内酰胺的低聚物和/或聚合物 得到含有己内酰胺的水性反应混合物，（b）从（a）得到的反应混合物中除去水，得到残渣，（c）将酸性介质中的（b）得到的残渣蒸馏，然后蒸馏 在碱性介质中的馏出物得到己内酰胺，或（c'）将在（b）获得的残余物在碱性介质中蒸馏，然后（d'），然后在酸性介质中蒸馏出馏出物，得到己内酰胺。

    Recovery of caprolactam from polycaprolactam
    10.
    发明授权
    Recovery of caprolactam from polycaprolactam 失效
    从己内酰胺中回收己内酰胺

    公开(公告)号：US5359062A

    公开(公告)日：1994-10-25

    申请号：US54064

    申请日：1993-04-29

    申请人： Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz ,  Claus-Ulrich Priester

    发明人： Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz ,  Claus-Ulrich Priester

    IPC分类号： C07D201/12 ,  C08G69/14

    CPC分类号： C07D201/12

    摘要： Caprolactam is recovered from polycaprolactam by hydrolyric cleavage of polycaprolactam with from 5 to 50 parts by weight of water per part by weight of polycaprolactam at from 200.degree. to 350.degree. C. under superatmospheric pressure to give an aqueous solution or suspension which contains monomeric caprolactam and oligomers thereof and may contain polycaprolactam and subsequent isolation of monomeric caprolactam from the aqueous solution or suspension by distillation or extraction, by a process in which the hydrolyric cleavage is carried out in the presence of an alkali metal hydroxide at a pH of from 5 to 10.

    摘要翻译： 己内酰胺通过在超大气压下在200-350℃下用5至50重量份的重量比的聚己内酰胺水解裂解聚己内酰胺从聚己内酰胺中回收，得到含有单体己内酰胺和 其低聚物并且可以含有聚己内酰胺并随后通过蒸馏或萃取从水溶液或悬浮液中分离单体己内酰胺，其中水解裂解在pH为5至10的碱金属氢氧化物存在下进行 。