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公开(公告)号：US5668277A
公开(公告)日：1997-09-16
申请号：US632082
申请日：1996-04-15
IPC分类号： B01J27/16 , C07B61/00 , C07C227/18 , C07C231/12 , C07C253/20 , C07D201/12
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。
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公开(公告)号：US5626912A
公开(公告)日：1997-05-06
申请号：US422527
申请日：1995-04-14
CPC分类号： D06N7/0068 , D06N7/0065 , D06N2201/0263 , D06N2203/065 , D06N2209/105 , D06N2209/1628 , D06N2213/03
摘要： The present invention relates to a tufted fabric and a method of manufacturing the same. The tufted fabric generally comprises a primary backing and tufts mounted in the primary backing to form a fabric with a faceside having piles and a backside having loops. A thermoplastic polymer adhesive, which bonds the tufts to the primary backing, is formed by applying a reactive mixture comprising a polymerizable monomer to the backside of the tufted fabric and in-situ polymerizing the monomers to form the thermoplastic polymer adhesive. The process is particularly advantageous for the manufacture of recyclable tufted fabrics in which the adhesive polymer and tufts are formed from substantially the same polymer. The tufted fabric can be used in articles, such as, for example carpets, rugs and upholstery.
摘要翻译： 本发明涉及一种簇绒织物及其制造方法。 簇绒织物通常包括主衬里和安装在主衬里中的簇，以形成具有桩的面的织物，并且具有环的背面。 通过将包含可聚合单体的反应性混合物施加到簇绒织物的背面并原位聚合单体以形成热塑性聚合物粘合剂来形成将簇结合到主衬里的热塑性聚合物粘合剂。 该方法对于可再生簇绒织物的制造特别有利，其中粘合剂聚合物和簇由基本上相同的聚合物形成。 簇绒织物可用于制品中，例如地毯，地毯和室内装潢。
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公开(公告)号：US06495682B2
公开(公告)日：2002-12-17
申请号：US09934679
申请日：2001-08-23
IPC分类号： C07D20116
CPC分类号： C07D201/12 , C07D201/16
摘要： The present invention relates to a process for purifying an impure stream of caprolactam while recovering not only pure caprolactam but also medium-to-high pressure steam. Preferably, the stream of impure or crude caprolactam, which comprises at a minimum a substantial portion of water, is obtained from depolymerization of a polyamide-containing composition. The resulting purified caprolactam will have a purity greater than 90 weight percent and the recovered steam will have a temperature sufficiently high to provide a driving force for use with other equipment, for instance, heat exchange equipment.
摘要翻译： 本发明涉及纯化己内酰胺不纯物流的方法，同时不仅回收纯己内酰胺，而且回收中至高压蒸汽。 优选地，含有至少大部分水的不纯或粗己内酰胺流是由含聚酰胺的组合物的解聚获得的。 得到的纯化的己内酰胺将具有大于90重量％的纯度，并且所回收的蒸汽将具有足够高的温度以提供与其它设备（例如热交换设备）一起使用的驱动力。
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公开(公告)号：US5556890A
公开(公告)日：1996-09-17
申请号：US253010
申请日：1994-06-02
IPC分类号： C07D201/12 , C07D201/16 , C08J11/14
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。
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