Process for preparing a melt-processable polyamide
    1.
    发明公开
    Process for preparing a melt-processable polyamide 审中-公开
    Verfahren zur Herstellung von aus der Schmelze verarbeitbarer聚酰胺

    公开(公告)号:EP1449865A1

    公开(公告)日:2004-08-25

    申请号:EP03075512.8

    申请日:2003-02-21

    IPC分类号: C08G69/18 C08G69/20 C08G69/46

    CPC分类号: C08G69/20 C08G69/18 C08G69/46

    摘要: The invention relates to a process for preparing a melt-processable polylactam by contacting caprolactam monomer with an anionic polymerization catalyst, polymerizing said monomer and contacting the resulting polylactam with a protic compound. The anionic polymerization catalyst is chosen from the group of alkali-earth-metal-lactamates and alkali-earth-metal-lactamate forming compounds and the protic compound has a pKa larger than 14. The resulting polylactam has a good melt-stability and very low cyclic dimer content.

    摘要翻译: 本发明涉及通过使己内酰胺单体与阴离子聚合催化剂接触来制备可熔融加工的聚内酰胺的方法,使所述单体聚合并使得到的聚内酰胺与质子化合物接触。 阴离子聚合催化剂选自碱土金属 - 内酰胺酸盐和碱土金属 - 乳酸氨基甲酸酯形成化合物,质子化合物的pKa大于14.所得聚内酰胺具有良好的熔体稳定性和非常低的 环状二聚体含量。

    Process for recycling polyamide-containing carpet waste
    2.
    发明公开
    Process for recycling polyamide-containing carpet waste 失效
    Verfahren zur Wiederverwertung von Polyamid-haltigenTeppichabfällen

    公开(公告)号:EP0759456A1

    公开(公告)日:1997-02-26

    申请号:EP96202315.6

    申请日:1996-08-19

    申请人: DSM N.V.

    IPC分类号: C08J11/08

    摘要: The invention relates to a process for recycling polyamide-containing carpet waste by extracting the polyamide from the carpet waste with an extraction agent containing an aliphatic alcohol, after which the polyamide is recovered from the extract. The process according to the present invention gives a high yield of the polyamide. The presence of other constituents normally used in carpet-making does not interfere with the recycling.

    摘要翻译: 本发明涉及通过用含有脂肪醇的提取剂从地毯废料中提取聚酰胺来回收含聚酰胺的地毯废物的方法,之后从提取物中回收聚酰胺。 根据本发明的方法得到高收率的聚酰胺。 通常用于地毯制作的其他成分的存在不会影响回收。

    Recovery of epsilon-caprolactam from aqueous mixtures
    3.
    发明公开
    Recovery of epsilon-caprolactam from aqueous mixtures 失效
    Gewinnung vonε-己内酰胺auswässrigenGemischen

    公开(公告)号:EP0826665A1

    公开(公告)日:1998-03-04

    申请号:EP96202436.0

    申请日:1996-09-02

    申请人: DSM N.V.

    IPC分类号: C07D201/00 C07D201/16

    CPC分类号: C07D201/08 C07D201/16

    摘要: Process to separate ε-caprolactam from an aqueous mixture containing ε-caprolactam and at least 0.5 wt% oligomers, wherein the separation is performed by extraction using an organic extraction agent. The aqueous mixture may be obtained in a process to prepare ε-caprolactam starting from 6-aminocapronitrile or in a process to prepare ε-caprolactam starting from 6-aminocaproic acid.

    摘要翻译: 从含有ε-己内酰胺和至少0.5wt%低聚物的含水混合物中分离ε-己内酰胺的方法,其中通过使用有机萃取剂萃取进行分离。 含水混合物可以在从6-氨基己腈开始制备ε-己内酰胺或从6-氨基己酸开始制备ε-己内酰胺的方法中获得。

    Reclaiming epsilon-caprolactam from carpet waste
    4.
    发明公开
    Reclaiming epsilon-caprolactam from carpet waste 失效
    Wiedergewinnung von Epsilon-Caprolactam aus Teppichabfallen。

    公开(公告)号:EP0627417A1

    公开(公告)日:1994-12-07

    申请号:EP94201576.9

    申请日:1994-06-02

    申请人: DSM N.V.

    CPC分类号: C07D201/12 C07D201/16

    摘要: The invention relates to a method of preparing ε-caprolactam by depolymerisation of nylon-6 originating from carpet wate wherein the mixture of ε-caprolactam and water is hydrogenated in the presence of hydrogen and a hydrogenation catalyst. The amount of ε-caprolactam in the mixture can be between 10 and 95% by weight.

    摘要翻译: 本发明涉及一种通过由地毯水解产生的尼龙-6的解聚制备ε-己内酰胺的方法,其中ε-己内酰胺和水的混合物在氢气和氢化催化剂存在下被氢化。 混合物中ε-己内酰胺的量可以在10至95重量%之间。

    Process for the preparation of a polyisocyanate containing isocyanurate groups
    6.
    发明公开
    Process for the preparation of a polyisocyanate containing isocyanurate groups 失效
    Verfahren zur Herstellung eines Isocyanuratgruppen enthaltenden Polyisocyanats。

    公开(公告)号:EP0571038A1

    公开(公告)日:1993-11-24

    申请号:EP93201405.3

    申请日:1993-05-18

    申请人: DSM N.V.

    IPC分类号: C07D251/34 C08G18/79

    CPC分类号: C07D251/34 C08G18/792

    摘要: The invention relates to a process for the preparation of a compound containing polyisocyanate and isocyanurate groups through trimerisation of 1,4-tetramethylenediisocyanate (TMDI), using a trimerisation catalyst, and the purification of the trimer desired, characterised in that the trimerisation is effected at a temperature below 90°C, the purification being effected through extraction, using an apolar solvent with a boiling point below 180°C, and evaporation of the solvent under lowered pressure, at a temperature below 90°C.

    摘要翻译: 本发明涉及一种通过使用三聚催化剂三聚化1,4-二亚甲基二异氰酸酯(TMDI)和所需三聚体的纯化来制备含有多异氰酸酯和异氰脲酸酯基团的化合物的方法,其特征在于三聚反应在 温度低于90℃时,使用沸点低于180℃的非极性溶剂,通过萃取进行纯化,并在低于90℃的温度下在低压下蒸发溶剂。

    Depolymerisation of polyamides
    8.
    发明公开
    Depolymerisation of polyamides 失效
    解聚聚醯胺

    公开(公告)号:EP0891969A1

    公开(公告)日:1999-01-20

    申请号:EP98202204.8

    申请日:1998-07-01

    申请人: DSM N.V.

    IPC分类号: C07D201/12

    摘要: The invention relates to a process for depolymerising one or more polyamides in the presence of at least an aliphatic alcohol, the depolymerisation taking place with at most 40 mol.% catalyst. This process provides good selectivity towards the monomeric components of polyamides. This process moreover causes as few waste streams as possible.

    摘要翻译: 本发明涉及一种在至少一种脂族醇存在下解聚一种或多种聚酰胺的方法,该解聚反应发生在最多40摩尔%的催化剂下。 该方法为聚酰胺的单体组分提供了良好的选择性。 这个过程还会导致尽可能少的废物流。

    Depolymerization of polyamides
    10.
    发明公开
    Depolymerization of polyamides 失效
    解聚聚醯胺

    公开(公告)号:EP0737666A1

    公开(公告)日:1996-10-16

    申请号:EP96200974.2

    申请日:1996-04-09

    申请人: DSM N.V.

    IPC分类号: C07C209/62 C07C253/20

    摘要: Process for the depolymerization of one or more polyamides in the presence of at least a nitrogen-containing compound, the depolymerization taking place at a pressure between 0.5 and 5 atm.
    As a result a better selectivity towards the monomeric components of polyamides is obtained.

    摘要翻译: 在至少含氮化合物的存在下使一种或多种聚酰胺解聚的方法,解聚发生在0.5〜5atm的压力下。 因此,获得了对聚酰胺的单体组分的更好的选择性。