Process for recovering and recycling polyamide from carpet waste
    1.
    发明授权
    Process for recovering and recycling polyamide from carpet waste 失效
    从地毯废物回收和回收聚酰胺的工艺

    公开(公告)号:US5840773A

    公开(公告)日:1998-11-24

    申请号:US701612

    申请日:1996-08-22

    IPC分类号: C08J11/08 C08J11/04

    摘要: The present invention relates to a process for treating polyamide-containing carpet waste by extracting the polyamide from the carpet waste with an extraction agent containing an aliphatic alcohol. The separated polyamide can then be recovered from the extract and recycled for further use. In addition, carpet waste containing two polyamides can be treated in accordance with the present invention so as to separately recover each polyamide. The process according to the present invention provides a high yield of the polyamide. The presence of other constituents normally present in carpets does not interfere with the separating and recycling of the polyamide.

    摘要翻译: 本发明涉及一种用含有脂肪醇的提取剂从地毯废物中提取聚酰胺来处理含有聚酰胺的地毯废物的方法。 然后可以从提取物中回收分离的聚酰胺并再循环用于进一步的使用。 此外,可以根据本发明处理含有两种聚酰胺的地毯废物,以便分别回收每种聚酰胺。 根据本发明的方法提供了高产率的聚酰胺。 通常存在于地毯中的其它成分的存在不会妨碍聚酰胺的分离和再循环。

    Depolymerization of polyamides
    2.
    发明授权
    Depolymerization of polyamides 失效
    聚酰胺的解聚

    公开(公告)号:US5668277A

    公开(公告)日:1997-09-16

    申请号:US632082

    申请日:1996-04-15

    CPC分类号: C07D201/12 C07C253/20

    摘要: One or more polyamides can be depolymerized in the presence of at least one nitrogen-containing compound. The depolymerization takes place at a pressure between about 0.5 and about 5 atm. The polyamide may be in the form of carpet waste or other heterogeneous form. Advantages include better selectivity towards the polyamide monomeric components and use of low pressure equipment to effect depolymerization.

    摘要翻译: 一种或多种聚酰胺可以在至少一种含氮化合物的存在下解聚。 解聚发生在约0.5和约5atm之间的压力下。 聚酰胺可以是地毯废物或其他不同形式的形式。 优点包括对聚酰胺单体组分的更好的选择性和使用低压设备来实现解聚。

    Reclaiming .epsilon.-caprolactam from carpet waste
    3.
    发明授权
    Reclaiming .epsilon.-caprolactam from carpet waste 失效
    从地毯废物中回收ε-己内酰胺

    公开(公告)号:US5556890A

    公开(公告)日:1996-09-17

    申请号:US253010

    申请日:1994-06-02

    CPC分类号: C07D201/12 C07D201/16

    摘要: The present invention is for a method of preparing purified .epsilon.-caprolactam from carpet waste containing nylon-6. Contaminated .epsilon.-caprolactam is obtained by depolymerizing nylon-6 from carpet waste. A mixture of the contaminated .epsilon.-caprolactam and water is then hydrogenated in the presence of hydrogen and a hydrogenation catalyst in order to produce purified .epsilon.-caprolactam. The amount of contaminated .epsilon.-caprolactam in the mixture can be between 10 and 95% by weight.

    摘要翻译: 本发明涉及从含有尼龙-6的地毯废物中制备纯化的ε-己内酰胺的方法。 通过从地毯废物中解聚尼龙-6得到受污染的ε-己内酰胺。 然后将污染的ε-己内酰胺和水的混合物在氢气和氢化催化剂的存在下氢化,以产生纯化的ε-己内酰胺。 混合物中受污染的ε-己内酰胺的量可以在10至95重量%之间。