Method of purifying .epsilon.-caprolactam
    52.
    发明授权
    Method of purifying .epsilon.-caprolactam 失效
    ε-己内酰胺的纯化方法

    公开(公告)号:US5952493A

    公开(公告)日:1999-09-14

    申请号:US202094

    申请日:1998-12-09

    Applicant: Eberhard Fuchs

    Inventor: Eberhard Fuchs

    CPC classification number: C07D201/16

    Abstract: Crude caprolactam is purified by reaction with a complex hydride of boron or of aluminum.

    Abstract translation: PCT No.PCT / EP98 / 03098 371 1998年12月9日第 102(e)日期1998年12月9日PCT提交1997年6月13日PCT公布。 公开号WO97 / 47596 日期1997年12月18日粗制己内酰胺通过与硼或铝的复合氢化物反应而纯化。

    Process for the purification of a water-.epsilon.-caprolactam mixture
    54.
    发明授权
    Process for the purification of a water-.epsilon.-caprolactam mixture 失效
    纯化ε-己内酰胺混合物的方法

    公开(公告)号:US5539106A

    公开(公告)日:1996-07-23

    申请号:US275739

    申请日:1994-07-19

    CPC classification number: C07D201/16

    Abstract: A process is described for the purification of .epsilon.-caprolactam which involves hydrogenation of a water-.epsilon.-caprolactam mixture in the presence of a heterogeneous hydrogenation catalyst, wherein the .epsilon.-caprolactam-water mixture is contacted with gaseous hydrogen, upon which hydrogen dissolves in the .epsilon.-caprolactam-water mixture, and subsequently, this hydrogen-containing mixture is contacted with the hydrogenation catalyst. About 90-100% of the hydrogen is dissolved in the water-.epsilon.-caprolactam mixture.

    Abstract translation: 描述了用于纯化ε-己内酰胺的方法,其涉及在非均相氢化催化剂存在下氢化ε-己内酰胺混合物,其中ε-己内酰胺 - 水混合物与气态氢接触,氢气溶解在 ε-己内酰胺 - 水混合物,随后将该含氢混合物与氢化催化剂接触。 大约90-100%的氢气溶解在ε-己内酰胺混合物中。

    Process for continuous purification of crude caprolactam prepared from
6-aminocapronitrile
    56.
    发明授权
    Process for continuous purification of crude caprolactam prepared from 6-aminocapronitrile 失效
    从6-氨基己腈制备的己内酰胺的连续纯化方法

    公开(公告)号:US5496941A

    公开(公告)日:1996-03-05

    申请号:US375410

    申请日:1995-01-18

    CPC classification number: C07D201/16 Y02P20/52

    Abstract: Crude capronitrile is purified by hydrogenation, subsequent treatment in an acidic medium and subsequent distillation in an alkaline medium, by a process in which(a) 6-aminocapronitrile is converted into crude caprolactam by reaction with water,(b) high boilers and low boilers are separated off from the crude caprolactam from step (a),(c) the crude caprolactam from step (b) is treated with hydrogen at from 50.degree. to 150.degree. C. and from 1.5 to 250 bar in the presence of a hydrogenation catalyst and, if desired, of a solvent to give a mixture A,(d1) mixture A in a solvent is passed, at from 30.degree. to 80.degree. C. and from 1 to 5 bar, over an ion exchanger containing terminal acid groups to give a mixture B1, or(d2) mixture A is distilled in the presence of sulfuric acid, any solvent present being removed before the addition of the sulfuric acid, to give a mixture B2, and(e) mixture B1 or mixture B2 is distilled in the presence of a base to give pure caprolactam.

    Abstract translation: 通过氢化纯化粗碳腈,随后在酸性介质中处理,随后在碱性介质中进行蒸馏,其中(a)通过与水反应将(a)6-氨基己腈转化为粗己内酰胺,(b)高锅炉和低锅炉 与步骤(a)中的粗己内酰胺分离,(c)步骤(b)中的粗己内酰胺在氢化催化剂存在下在50-150℃和1.5-250巴下用氢处理 并且如果需要,得到溶剂以得到混合物A,(d1)溶剂中的混合物A在30℃至80℃和1至5巴条件下通过含有末端酸基团的离子交换剂 得到混合物B1,或(d2)在硫酸存在下蒸馏混合物A,在加入硫酸之前,除去存在的任何溶剂,得到混合物B2,并且(e)蒸馏出混合物B1或混合物B2 在碱的存在下得到纯己内酰胺。

    Preparation of N-substituted 2-pyrrolidones
    57.
    发明授权
    Preparation of N-substituted 2-pyrrolidones 失效
    N-取代的2-吡咯烷酮的制备

    公开(公告)号:US5434273A

    公开(公告)日:1995-07-18

    申请号:US191649

    申请日:1994-02-04

    CPC classification number: C07D207/267

    Abstract: The preparation of N-substituted 2-pyrrolidones (I) by the reaction of maleic acid, fumaric acid, or succinic acid or functional derivatives of these acids (compounds II) with a primary amine (III) or by the reaction of amides or imides derived from II and III under hydrogenating conditions in a synthesis stage followed by isolation, by distillation, of I and other volatile components from the resulting reaction mixture, in which the residues present following distillation are subjected to further hydrogenation treatment and the compound (I) thus formed is isolated by distillation.

    Abstract translation: 通过马来酸,富马酸或琥珀酸或这些酸(化合物II)的官能衍生物与伯胺(III)的反应或通过酰胺或酰亚胺的反应制备N-取代的2-吡咯烷酮(I) 在合成阶段在氢化条件下衍生自II和III,然后通过蒸馏从所得反应混合物中分离I和其它挥发性组分,其中在蒸馏之后存在的残余物进行进一步氢化处理,化合物(I) 由此形成的蒸馏分离。

    Process for the preparation of .omega.-lactams, in particular caprolactam
    60.
    发明授权
    Process for the preparation of .omega.-lactams, in particular caprolactam 失效
    制备ω-内酰胺的方法,特别是己内酰胺

    公开(公告)号:US4349473A

    公开(公告)日:1982-09-14

    申请号:US199218

    申请日:1980-10-21

    Abstract: Process for the preparation of .omega.-lactams (in particular caprolactam)ith improved yields, by reaction of cycloaliphatic derivatives having the general formula: ##STR1## wherein n=3-13 with nitrosating agents in the presence of dehydrating agents, characterized by the fact that the reaction is carried out a low temperature which is constant between stages, and in all the zones of a stage and with particular concentrations of the dehydrating agent.

    Abstract translation: 通过在脱水剂存在下,通过使具有以下通式的脂环族衍生物(其中n = 3-13)与亚硝化剂反应制备具有改善产率的ω-内酰胺(特别是己内酰胺)的方法,其特征在于: 反应进行阶段之间恒定的低温,在一个阶段的所有区域和特定浓度的脱水剂中进行。

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