IMPROVED METHOD FOR MAKING CAPROLACTAM FROM IMPURE 6-AMINOCAPRONITRILE
    42.
    发明公开
    IMPROVED METHOD FOR MAKING CAPROLACTAM FROM IMPURE 6-AMINOCAPRONITRILE 审中-公开
    改进方法,从不纯的6-氨基己腈PRODUCING己内酰胺

    公开(公告)号:EP1858842A1

    公开(公告)日:2007-11-28

    申请号:EP06738305.9

    申请日:2006-03-15

    CPC classification number: C07D223/10

    Abstract: The invention relates to the field of production of lactams from aminonitriles, and in particular to the production of ϵ-caprolactam by the vapor phase hydrolytic cyclization of 6-aminocapronitrile. A crude liquid caprolactam comprising ϵ-caprolactam (CL), 6-aminocapronitrile (ACN) and water obtained from a vapor phase cyclization reaction of ACN is contacted with hydrogen in the presence of a hydrogenation catalyst to convert the ACN in the crude liquid caprolactam to a product comprising hexamethylenediamine (HMD) and hexamethyleneimine (HMI). Tetrahydroazepine (THA) in the crude liquid caprolactam is converted to HMI during this hydrogenation. The HMD and HMI have lower boiling points compared to ACN and thus they are more easily separated from CL in the subsequent distillation operations. Thus a process to make CL from ACN with fewer distillation stages, and with lower pressure drop and lower base temperature, is accomplished.

    VERFAHREN UND HERSTELLUNG VON CAPROLACTAM
    44.
    发明授权
    VERFAHREN UND HERSTELLUNG VON CAPROLACTAM 有权
    方法和制造己内酰胺

    公开(公告)号:EP1289949B1

    公开(公告)日:2007-09-05

    申请号:EP01947366.9

    申请日:2001-06-13

    CPC classification number: C07D201/08 Y02P20/52

    Abstract: The invention relates to a method for the production of caprolactam from a compound of formula (I): NC-(CH2)5-CO-R where R = a carboxamido, carboxlic acid or carboxylate ester group, characterised in that a) a compound (I), or mixtures thereof are hydrogenated with hydrogen in the presence of ammonia, a catalyst (II) and optionally a fluid solvent (VI) to give a mixture (III), b) separation of catalyst (II) and hydrogen from the mixture (III) to give a mixture (IV) and c) reaction of mixture (IV), in the presence of a catalyst (V) and optionally a fluid solvent (VII), to give caprolactam.

    SYNTHESIS OF CAPROLACTAM FROM LYSINE
    45.
    发明公开
    SYNTHESIS OF CAPROLACTAM FROM LYSINE 有权
    己内酰胺OFF赖氨酸合成

    公开(公告)号:EP1761487A1

    公开(公告)日:2007-03-14

    申请号:EP05759156.2

    申请日:2005-06-09

    Inventor: FROST, John, W.

    CPC classification number: C07D223/12 C07D201/08

    Abstract: In various embodiments, the present invention can involve a method of synthesizing α-amino-ϵ -caprolactam. The method can comprise heating a salt of L-lysine in a solvent comprising an alcohol. In other embodiments, the present invention can involve methods for synthesizing ϵ-caprolactam. The methods can comprise heating a salt of L-lysine in a solvent comprising an alcohol and deaminating the reaction product. In various embodiments, the invention can include methods of converting biomass into nylon 6. The methods can comprise heating L-lysine in a solvent comprising an alcohol to produce α-amino -ϵ­ caprolactam, deaminating to produce ϵ-caprolactam and polymerizing into nylon 6, wherein the L-lysine is derived from the biomass. In other embodiments, the present invention can include methods of making nylon 6. The methods can comprise synthesizing ϵ-caprolactam and then polymerizing, wherein the ϵ-­caprolactam is derived from L-lysine.

    VERFAHREN ZUR HERSTELLUNG VON PYRROLIDONEN

    公开(公告)号:EP1401811A1

    公开(公告)日:2004-03-31

    申请号:EP02754703.3

    申请日:2002-06-18

    CPC classification number: C07D207/267

    Abstract: The invention relates to a method for producing pyrrolidones which are optionally N-substituted by hydrogenation in the gas phase in moisture free conditions of substrates selected from C4-dicarboxylic acids and derivatives thereof, optionally by adding ammonia or primary amines, using a Cr-free catalyst with 5 - 95 wt. % of CuO, preferably 30 - 70 wt.- % of CuO, and 5 - 95 wt.- % of Al2O3, preferably 30 - 70 wt.- % of Al2O3, and O - 60 wt.- %, preferably 5 - 40 wt. % of ZnO.

    Abstract translation: 本发明涉及一种生产吡咯烷酮的方法,所述吡咯烷酮任选在气相中在选自C 4 - 二羧酸及其衍生物的底物的无水条件下通过氢化进行N-取代,任选通过添加氨或伯胺,使用无Cr 催化剂与5-95wt。 的CuO,优选30-70重量%的CuO和5-95重量%的Al 2 O 3,优选30-70重量%的Al 2 O 3和0-60重量%,优选5-40重量% 重量。 %的ZnO。

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