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29 条记录 (耗时 0.018 秒)

    Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof
    11.
    发明授权
    Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof 失效
    从己内酰胺蒸馏低沸点锅炉或高锅炉或其混合物中回收己内酰胺

    公开(公告)号：US4882430A

    公开(公告)日：1989-11-21

    申请号：US257274

    申请日：1988-10-13

    申请人： Gerald Neubauer ,  Emile De Decker ,  Hugo Fuchs ,  Bernhard Holzknecht ,  Josef Ritz

    发明人： Gerald Neubauer ,  Emile De Decker ,  Hugo Fuchs ,  Bernhard Holzknecht ,  Josef Ritz

    IPC分类号： C07D201/16

    CPC分类号： C07D201/16

    摘要： Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps:(a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor,(b) separating off the purified caprolactam crystals to leave a mother liquor,(c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d),(d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage(e) (d) and recycling the same into stage (a) to leave a mother liquor,(f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).

    摘要翻译： 通过以下步骤从己内酰胺蒸馏低锅炉或高锅炉或其混合物回收己内酰胺：（a）使低或高锅炉或其混合物结晶以形成纯化的己内酰胺结晶和母液，（b）将 纯化的己内酰胺晶体离开母液，（c）将阶段（b）的母液的5至90重量％循环到阶段（a）中，并将剩余的母液转移到后续阶段（d）中， （d）从阶段（c）中将剩余的母液部分结晶以形成己内酰胺晶体和母液，分离阶段（e）（d）的己内酰胺晶体并将其再循环到阶段（a）中以留下母液 ，（f）将阶段（e）的母液的20至99重量％循环到阶段（d）中，并且引出阶段（e）的含杂质母液的剩余部分。

    Storability of molten cyclohexanone oxime
    18.
    发明授权
    Storability of molten cyclohexanone oxime 失效
    熔融环己酮肟的储存性

    公开(公告)号：US4931592A

    公开(公告)日：1990-06-05

    申请号：US429799

    申请日：1989-10-31

    申请人： Hugo Fuchs ,  David Agab ,  Gerald Neubauer ,  Josef Ritz

    发明人： Hugo Fuchs ,  David Agab ,  Gerald Neubauer ,  Josef Ritz

    IPC分类号： C07C249/14 ,  C07C251/44

    CPC分类号： C07C249/14

    摘要： The storability of molten cyclohexanone oxime containing 0.5-15% by weight of cyclohexanone and 1-8% by weight of aqueous ammonium bisulfate solution is improved by washing the molten cyclohexanone oxime with a 10-42% strength by weight aqueous ammonium sulfate solution and maintaining a pH of 4.5-5.8.

    摘要翻译： 通过用10-42％重量的硫酸铵水溶液洗涤熔融的环己酮肟，维持熔融环己酮肟的含量为0.5-15％（重量）的环己酮和1-8％（重量）的硫酸氢铵水溶液， pH值为4.5-5.8。

    Process for obtaining coarsely crystalline pure ammonium sulfate
    19.
    发明授权
    Process for obtaining coarsely crystalline pure ammonium sulfate 失效
    获得粗结晶纯硫酸铵的方法

    公开(公告)号：US4138472A

    公开(公告)日：1979-02-06

    申请号：US844647

    申请日：1977-10-25

    申请人： Gerald Neubauer ,  Gerard Van Wauwe ,  Josef Beullens ,  Uwe Brand ,  Hugo Fuchs ,  Klaus Kartte

    发明人： Gerald Neubauer ,  Gerard Van Wauwe ,  Josef Beullens ,  Uwe Brand ,  Hugo Fuchs ,  Klaus Kartte

    IPC分类号： C01C1/242 ,  C01C1/248

    CPC分类号： C01C1/242 ,  C01C1/248

    摘要： A process for obtaining coarsely crystalline pure ammonium sulfate from reaction mixtures which have been obtained by Beckmann rearrangement of cyclohexanone-oxime with sulfuric acid or oleum, by neutralizing the mixtures with ammonia at an elevated temperature, with the addition of recycled ammonium sulfate mother liquor, the concentration being so chosen that during the neutralization no solid ammonium sulfate precipitates, separating the crude caprolactam from the ammonium sulfate solution, crystallizing ammonium sulfate by evaporating the ammonium sulfate solution under reduced pressure, separating off the crystallized ammonium sulfate and recycling the mother liquor to the neutralization stage. The neutralization is carried out at from 80.degree. to 115.degree. C. under autogenous pressure and the ammonium sulfate solution obtained after separating off the crude lactam is evaporated under a pressure of from 200 to 600 mm Hg while cooling to from 72.degree. to 101.degree. C.

    摘要翻译： 从反应混合物中获得粗结晶纯硫酸铵的方法，其通过用硫酸或发烟硫酸重整环己酮 - 肟，通过在升高的温度下用氨中和混合物，再加入回收的硫酸铵母液， 浓度如此选择，使得在中和期间没有固体硫酸铵沉淀，将粗己内酰胺与硫酸铵溶液分离，通过在减压下蒸发硫酸铵溶液使硫酸铵结晶，分离结晶的硫酸铵并将母液再循环至 中和阶段。 中和在自生压力下在80〜115℃进行，分离出内酰胺后得到的硫酸铵溶液在200〜600mmHg的压力下蒸发，同时冷却至72〜101℃。 C。