公开(公告)号：US06111099A

公开(公告)日：2000-08-29

申请号：US5512

申请日：1998-01-12

申请人： Yvonne H Frentzen ,  Marcellinus P. G. Thijert ,  Rudolf L. Zwart

发明人： Yvonne H Frentzen ,  Marcellinus P. G. Thijert ,  Rudolf L. Zwart

IPC分类号： C07D201/12 ,  C07D201/16

CPC分类号： C07D201/12

摘要： A process for depolymerizing nylon 6 and recovering caprolactam from the depolymerized products by extraction with alkyl phenolic compounds. Process steps include (a) treating a first mixture comprising nylon 6 with water at a temperature between about 200.degree. C. and about 400.degree. C. to yield a second mixture comprising depolymerized nylon 6 components, wherein the second mixture contains caprolactam at a concentration between about 5 wt. % and about 35 wt. %; (b) optionally, separating insoluble material from the second mixture; (c) extracting the second mixture with an extraction agent to yield an aqueous raffinate third mixture and an organic phase fourth mixture comprising caprolactam and the extraction agent, wherein the extraction agent is an alkyl phenol having a boiling point higher than that of the caprolactam; (d) recovering caprolactam from the organic phase fourth mixture by distillation; (e) recycling the aqueous raffinate third mixture to step (a).

摘要翻译： 一种通过用烷基酚类化合物萃取从解聚产物中解聚尼龙6并回收己内酰胺的方法。 工艺步骤包括（a）在约200℃至约400℃之间的温度下处理包含尼龙6的第一混合物与水，以产生包含解聚的尼龙6组分的第二混合物，其中第二混合物含有浓度为的己内酰胺 约5wt。 ％和约35wt。 ％; （b）任选地，从第二混合物中分离不溶物质; （c）用提取剂萃取第二混合物，得到含水萃余液第三混合物和包含己内酰胺和提取剂的有机相第四混合物，其中提取剂是沸点高于己内酰胺的沸点的烷基苯酚; （d）通过蒸馏从有机相第四混合物中回收己内酰胺; （e）将含水萃余液第三混合物再循环到步骤（a）。

公开(公告)号：US4133810A

公开(公告)日：1979-01-09

申请号：US871005

申请日：1978-01-20

申请人： Willem J. Wassen ,  Rudolf L. Zwart

发明人： Willem J. Wassen ,  Rudolf L. Zwart

IPC分类号： C07D201/16

CPC分类号： C07D201/16

摘要： An improvement of processes for the recovery of .epsilon.-caprolactam wherein a neutralized sulfuric acid is subjected to thermal decomposition, forming a gaseous mixture of ammonia and sulfur dioxide which is thereafter converted to an aqueous solution of ammonium sulfite and/or ammonium hydrogen sulfite which is then used for neutralization of the reaction mixture of lactam and sulfuric acid.

摘要翻译： 改进ε-己内酰胺回收方法，其中中和的硫酸经受热分解，形成氨和二氧化硫的气体混合物，然后转化成亚硫酸氢铵和/或亚硫酸氢铵的水溶液，其为 然后用于中和内酰胺和硫酸的反应混合物。

公开(公告)号：US5064627A

公开(公告)日：1991-11-12

申请号：US395794

申请日：1989-08-18

申请人： Rudolf L. Zwart ,  Johan T. Tinge

发明人： Rudolf L. Zwart ,  Johan T. Tinge

IPC分类号： C01B3/56

CPC分类号： C01B3/56 ,  C01B2203/043 ,  C01B2203/0465 ,  C01B2203/048

摘要： A continuous process for separating hydrogen in high purity from a gaseous hydrogen-containing mixture by absorbing in an absorber unit the hydrogen by metal hydride forming particles suspended in an inert liqid and desorbing in a desorber unit the hydrogen from the hydrided particles includes the step of treating the suspension of the hydrided particles before entering the desorber unit to remove dissolved gaseous non-hydrogen components by stripping with hydrogen, preferably with a part of desorbed hydrogen. By this way it is possible to obtain hydrogen having a purity of more than 99.9%.

公开(公告)号：US4140685A

公开(公告)日：1979-02-20

申请号：US810568

申请日：1977-06-27

申请人： Reijer Goettsch ,  Rudolf L. Zwart

发明人： Reijer Goettsch ,  Rudolf L. Zwart

IPC分类号： C01C1/24 ,  C07D201/16

CPC分类号： C07D201/16

摘要： The process is directed to recovering .epsilon.-caprolactam from a reaction mixture containing .epsilon.-caprolactum and sulfuric acid by separating the caprolactam from the sulfuric acid by an extraction. Extraction includes the steps of neutralizing a part of said sulfuric acid with ammonia, ammonium sulfate, ammonium hydrogen sulfate or mixture thereof, to form an ammonium salt of at least part of said sulfuric acid as a neutralization product, thermally decomposing a part of the ammonium salt formed to produce a gaseous mixture of ammonia and sulfur dioxide and contacting another portion of the neutralization product with said gaseous mixture to produce ammonium hydrogen sulfate, ammonium sulfate or both, and neutralizing at least a part of the sulfuric acid in the reaction mixture with said ammonium hydrogen sulfate, ammonium sulfate or both.

摘要翻译： 该方法涉及通过萃取从己酸内酯和己酸的反应混合物中回收ε-己内酰胺。 提取包括用氨，硫酸铵，硫酸氢铵或其混合物中和一部分硫酸的步骤，以形成至少部分所述硫酸的铵盐作为中和产物，热分解一部分铵 形成的盐以产生氨和二氧化硫的气体混合物，并使另一部分中和产物与所述气体混合物接触以产生硫酸氢铵，硫酸铵或两者，并将反应混合物中的至少一部分硫酸中和 所述硫酸氢铵，硫酸铵或两者。