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    Recovery of caprolactam from caprolactam distillation low boilers or high boilers or mixtures thereof
    1.
    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。

    Recovery of caprolactam from oligomers and/or polymers of caprolactam
    2.
    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
    5.
    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 。

    Recovery of caprolactam from oligomers and/or polymers of caprolactam
    7.
    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/或聚合物回收己内酰胺

    公开(公告)号：US5360905A

    公开(公告)日：1994-11-01

    申请号：US60972

    申请日：1993-05-14

    申请人： Hugo Fuchs ,  Claus-Ulrich Priester ,  Gerald Neubauer ,  Erwin Brunner ,  Josef Ritz ,  Michael Kopietz

    发明人： Hugo Fuchs ,  Claus-Ulrich Priester ,  Gerald Neubauer ,  Erwin Brunner ,  Josef Ritz ,  Michael Kopietz

    IPC分类号： C08J11/00 ,  C07D201/12 ,  C08J11/14

    CPC分类号： C07D201/12

    摘要： A process for recovering caprolactam from oligomers and/or polymers of caprolactam comprises the following steps:a) treating oligomers and/or polymers of caprolactam with from 1 to 20 parts by weight of water per part by weight of oligomer or polymer at from 200.degree. to 350.degree. C. under superatmospheric pressure with a residence time of from 0.5 to 10 hours to form an aqueous reaction mixture comprising polycaprolactam, monomeric caprolactam and oligomers thereof, andb) passing the aqueous reaction mixture obtained in a) into a fluidized bed of alumina at from 250.degree. to 400.degree. C. to obtain a mixture of steam and caprolactam.

    摘要翻译： 从己内酰胺的低聚物和/或聚合物中回收己内酰胺的方法包括以下步骤：a）在200℃下用每重量份低聚物或聚合物1至20重量份水处理己内酰胺的低聚物和/或聚合物 在超大气压下加热至350℃，停留时间为0.5至10小时，以形成包含聚己内酰胺，单体己内酰胺及其低聚物的含水反应混合物，和b）将a）中得到的含水反应混合物送入流化床 氧化铝在250-400℃下反应，得到蒸汽与己内酰胺的混合物。

    Storability of molten cyclohexanone oxime
    9.
    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。

    Work-up of aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxyl-ammonium and ammonium salts
    10.
    发明授权
    Work-up of aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxyl-ammonium and ammonium salts 失效
    含有氢氯酸，硫酸及其羟基铵和氨基铵的水性母液的加工

    公开(公告)号：US5124138A

    公开(公告)日：1992-06-23

    申请号：US631155

    申请日：1990-12-20

    申请人： Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz

    发明人： Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz

    IPC分类号： C01B21/14 ,  C02F1/26 ,  C07C249/08 ,  C07C251/44

    CPC分类号： C01B21/1472 ,  C02F1/26

    摘要： A process for working up aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxylammonium and ammonium salts, entails the mother liquors being intimately mixed with an excess of cyclohexanone based on the content of hydroxylammonium salts, while maintaining a pH of from 3 to 5.5 by adding alkali metal hydroxide solutions, and the cyclohexanone phase which contains cyclohexanone oxime being removed and washed with water until essentially free of chloride.

    摘要翻译： 处理含有盐酸，硫酸及其羟基铵和铵盐的含水母液的方法需要使母液基于羟基铵盐的含量与过量的环己酮充分混合，同时保持pH为3至5.5 通过加入碱金属氢氧化物溶液和除去环己酮肟的环己酮相，并用水洗涤至基本上不含氯化物。