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1. 发明授权

US6093788A Process of recovering .epsilon.-caprolactam from PA-6 synthesis extract water 有权
标题翻译：从PA-6合成萃取水中回收ε-己内酰胺的方法
公开(公告)号：US6093788A
公开(公告)日：2000-07-25
申请号：US169531
申请日：1998-10-09
申请人： Claus Born , Stefan Deibert , Jurgen Schiwek , Konrad Wolf
发明人： Claus Born , Stefan Deibert , Jurgen Schiwek , Konrad Wolf
IPC分类号： B01D1/26 , C02F1/04 , C07D201/12 , C08G69/16 , C08G69/18 , C08G69/00 , C08G73/10
CPC分类号： B01D1/26 , C02F1/048 , C07D201/12 , C08G69/16 , C08G69/18
摘要： The invention comprises a process of producing .epsilon.-caprolactam from extract water of polycaprolactam obtained by hydrolytic polymerization, wherein(i) the extract water is concentrated by distillation of water,(ii) from the concentrated extract water from stage (i) an extract of .epsilon.-caprolactam and oligomers including dimers is obtained by separating an .epsilon.-caprolactam/water vapor mixture,(iii) the extract from stage (ii) is depolymerized in the presence of a catalyst and superheated steam, where a vapor mixture of .epsilon.-caprolactam and water is obtained, and(iv) from the .epsilon.-caprolactam/water vapor mixtures of process stages (ii) and (iii) .epsilon.-caprolactam with a dimer content of .ltoreq.0.2 wt-% is obtained by distillation of water.
摘要翻译：本发明包括从通过水解聚合获得的聚己内酰胺的提取水中生产ε-己内酰胺的方法，其中（i）通过蒸馏水将提取物的水浓缩，（ii）来自阶段（i）的浓缩提取物水， ε-己内酰胺和包含二聚体的低聚物通过分离ε-己内酰胺/水蒸汽混合物而获得，（iii）在催化剂和过热蒸汽的存在下将阶段（ii）的提取物解聚，其中ε-己内酰胺并且获得水，并且（iv）通过蒸馏水获得具有二元含量

2. 发明授权

US07173127B2 Method for the manufacture of caprolactam from waste containing polyamides 失效
标题翻译：从含有聚酰胺的废物制造己内酰胺的方法
公开(公告)号：US07173127B2
公开(公告)日：2007-02-06
申请号：US10457831
申请日：2003-06-09
申请人： Claus Born , Rudolf K{hacek over (a)}mpf , Joachim Seelig , Reinhard Wolf
发明人： Claus Born , Rudolf K{hacek over (a)}mpf , Joachim Seelig , Reinhard Wolf
IPC分类号： C07D201/16
CPC分类号： C07D201/12
摘要： This invention relates to a continuous and efficient method for the manufacture of highly pure caprolactam suitable for the polycondensation of Polyamide 6 (polycaprolactam) from polyamide waste. In particular the invention relates to a method for the manufacture of caprolactam from waste containing polyamides, including the steps a) depolymerisation of the waste containing polyamides, whereby a caprolactam raw material and a flow containing secondary constituents or additives is obtained, b) at least one distillation of the caprolactam raw material, and c) at least one crystallisation of the caprolactam material obtained in step b), by which means caprolactam is obtained, whereby at least part of the caprolactam obtained in step c) with a permanganate number of
摘要翻译：本发明涉及用于制备适用于聚酰胺废物聚酰胺6（聚己内酰胺）缩聚的高纯度己内酰胺的连续和有效的方法。具体地说，本发明涉及一种从含有聚酰胺的废物中制造己内酰胺的方法，包括以下步骤：a）对含有废物的聚酰胺进行解聚，由此得到己内酰胺原料和含有二级成分或添加剂的流体，b）至少己内酰胺原料的一次蒸馏，和c）步骤b）中获得的己内酰胺材料的至少一种结晶，通过该方法获得己内酰胺，由此至少部分步骤c）中获得的己内酰胺的高锰酸盐数目< 10000秒并且在解聚之前和/或期间，将含有<85％的UV透射率加入到含废物的聚酰胺中。

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