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    • 1. 发明授权
    • Obtaining caprolactam by cleavage of molten polycaprolactam
    • 通过熔融聚己内酰胺的裂解获得己内酰胺
    • US5455346A
    • 1995-10-03
    • US355283
    • 1994-12-12
    • Michael KopietzUlrich KalckSimon JonesPeter BasslerClaus-Ulrich Priester
    • Michael KopietzUlrich KalckSimon JonesPeter BasslerClaus-Ulrich Priester
    • C07D201/12
    • C07D201/12
    • Caprolactam is obtained from mixtures which contain polymers or thermoplastic molding materials having the repeating unit--N(H)--(CH.sub.2).sub.5 --C(O)--(a) by cleavage at elevated temperatures in the presence of a base under reduced pressure or (b) in the presence of water, by using a mixture essentially comprisingfrom 50 to 99.9% by weight of a polymer or of a thermoplastic molding material having the repeating unit--N(H)--(CH.sub.2).sub.5 --C(O)--from 0.1 to 50% by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes,from 0 to 10% by weight of organic and/or inorganic additives,from 0 to 40% by weight of non-polyamide-containing polymers andfrom 0 to 20% by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam,and carrying out the cleavage in the presence of a base under reduced pressure, the water content of the mixture used being not more than 0.01% by weight, or carrying out the cleavage in the presence of water without the addition of acid or base at from 270.degree. to 350.degree. C. and a weight ratio of water to polymer or thermoplastic molding material of from 1:1 to 20:1 and in a reaction time of less than 3 hours.
    • 己内酰胺由含有聚合物或具有重复单元-N(H) - (CH 2)5 -C(O) - (a)的聚合物或热塑性模塑材料的混合物获得,通过在碱的存在下在减压下在升高的温度下裂解,或 (B)在水的存在下,通过使用基本上包含50-99.9重量%的聚合物或具有重复单元-N(H) - (CH 2)5 -C(O)的热塑性模塑材料的混合物, - 0.1至50重量%的选自无机填料,有机和无机颜料和染料的添加剂,0至10重量%的有机和/或无机添加剂,0至40重量%的非 - 聚酰胺的聚合物和0〜20重量%的聚酰胺,但是由己内酰胺制备的聚己内酰胺和共聚酰胺除外,在减压下在碱的存在下进行裂解,所用混合物的水含量为 不大于0.01重量%,或进行切割 在没有在270-350℃下加入酸或碱的水存在下,水与聚合物或热塑性成型材料的重量比为1:1至20:1,反应时间小于 3小时。
    • 7. 发明授权
    • Process for producing caprolactam through hydrolytic cleavage of molten
polycaprolactam
    • 通过熔融聚己内酰胺的水解裂解生产己内酰胺的方法
    • US5495015A
    • 1996-02-27
    • US355286
    • 1994-12-12
    • Peter BasslerMichael Kopietz
    • Peter BasslerMichael Kopietz
    • B03B9/06C07D201/12C08J11/14
    • C07D201/12
    • Caprolactam is obtained from caprolactam-containing polymers in the presence of superheated water by bringing polymers which contain the repeating unit--[--N(H)--(CH.sub.2).sub.5 --C(O)--]--or mixtures consisting essentially of______________________________________from 40 to 99.9% by weight of a polymer containing the repeat- ing unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--]--,from 0.01 to 50% by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes,from 0 to 10% by weight of organic and/or inorganic additives,from 0 to 40% by weight of non-polyamide-containing polymers andfrom 0 to 60% by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam,______________________________________into contact with superheated water at from 280.degree. to 320.degree. C. and from 7.5 to 15 MPa and a weight ratio of water to polymer containing the repeating unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--]-- of from 5:1 to 13:1 and in a reaction time of less than 3 hours, with the proviso that the reaction mixture, consisting essentially of water and the polymer used or the mixture used, contains no gaseous phase under the conditions of the hydrolysis.
    • 在过热水存在下,通过使含有重复单元 - [ - N(H) - (CH 2)5 -C(O) - ] - 的聚合物或由基本上由40组成的混合物 至99.9重量%的含有重复单元的聚合物 - [-N(H) - (CH 2)5 -C(O) - ] - , - 0.01-50重量% - 由无机填料,有机和无机颜料和染料组成, - 0至10重量%的有机和/或无机添加剂, - 0至40重量%的非聚酰胺含聚合物和 - 0至60重量%的聚酰胺,除了由己内酰胺制备的聚己内酰胺和共聚酰胺与280℃至320℃和7.5至15MPa的过热水接触,并且水与 含有重复单元的聚合物 - [ - N(H) - (CH2)5-C(O) - ] - 为5:1至13:1,反应时间小于3小时,条件是 反应mi 主要由水组成,所使用的聚合物或所使用的混合物在水解条件下不含气相。