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公开(公告)号:US07390897B2
公开(公告)日:2008-06-24
申请号:US11083715
申请日:2006-02-10
IPC分类号: C07D201/08
CPC分类号: C07D223/10
摘要: The invention relates to the field of production of lactams from aminonitriles, and in particular to the production of ε-caprolactam by the vapor phase hydrolytic cyclization of 6-aminocapronitrile. A crude liquid caprolactam comprising ε-caprolactam (CL), 6-aminocapronitrile (ACN) and water obtained from a vapor phase cyclization reaction of ACN is contacted with hydrogen in the presence of a hydrogenation catalyst to convert the ACN in the crude liquid caprolactam to a product comprising hexamethylenediamine (HMD) and hexamethyleneimine (HMI). Tetrahydroazepine (THA) in the crude liquid caprolactam is converted to HMI during this hydrogenation. The HMD and HMI have lower boiling points compared to ACN and thus they are more easily separated from CL in the subsequent distillation operations. Thus a process to make CL from ACN with fewer distillation stages, and with lower pressure drop and lower base temperature, is accomplished.
摘要翻译: 本发明涉及由氨基腈生产内酰胺的领域,特别涉及通过6-氨基己腈的气相水解环化生产ε-己内酰胺。 包含ε-己内酰胺(CL),6-氨基己腈(ACN)和由ACN的气相环化反应获得的水的粗液体己内酰胺在氢化催化剂存在下与氢气接触,将粗液体己内酰胺中的ACN转化为 包含六亚甲基二胺(HMD)和六亚甲基亚胺(HMI)的产品。 粗制液体己内酰胺中的四氢吖庚因(THA)在该氢化期间转化为HMI。 与ACN相比,HMD和HMI具有较低的沸点,因此在随后的蒸馏操作中它们更容易与CL分离。 因此,实现了具有较少蒸馏阶段以及较低压降和较低基础温度的来自ACN的CL的方法。
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公开(公告)号:US06376714B1
公开(公告)日:2002-04-23
申请号:US09871102
申请日:2001-05-31
IPC分类号: C07C20948
CPC分类号: C07C253/30 , C07C209/48 , C07C211/09 , C07C255/24
摘要: Process for converting a dinitrile to a diamine and optionally an aminonitrile, in which a Group VIII element catalyst is treated with a modifier either before or during a substantially solvent-free hydrogenation reaction in which the dinitrile is contacted with hydrogen in the presence of the catalyst.
摘要翻译: 将二腈转化为二胺和任选的氨基腈的方法,其中在催化剂存在下,二腈与氢气接触的基本上无溶剂的氢化反应之前或期间,用改性剂处理VIII族元素催化剂 。
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公开(公告)号:US06906218B2
公开(公告)日:2005-06-14
申请号:US10322273
申请日:2002-12-18
IPC分类号: C07C255/31 , C07F9/145 , C07F9/6574 , C07C255/03
CPC分类号: C07F9/65744 , C07C255/31 , C07C2601/14 , C07F9/145
摘要: Disclosed herein are methods for preparing nitrile derivatives and their corresponding amines from 1-,2-,4-trivinylcyclohexane by hydrocyanation, followed by hydrogenation. Also disclosed are novel compounds used in the methods described herein.
摘要翻译: 本文公开了通过氢氰化从1-,2-,4-三乙烯基环己烷制备腈衍生物及其相应的胺,然后氢化的方法。 还公开了用于本文所述方法的新化合物。
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