发明授权
- 专利标题: Method for preparing cylcohexylamine
- 专利标题(中): 环戊胺的制备方法
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申请号: US758142申请日: 1996-11-25
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公开(公告)号: US5714635A公开(公告)日: 1998-02-03
- 发明人: Yin-Zu Chen , Zhang-Feng Yang , I-Hui Chen
- 申请人: Yin-Zu Chen , Zhang-Feng Yang , I-Hui Chen
- 申请人地址: TWX Taipei
- 专利权人: San Fu Chemical Co., Ltd.
- 当前专利权人: San Fu Chemical Co., Ltd.
- 当前专利权人地址: TWX Taipei
- 优先权: TWX85106761 19960606
- 主分类号: B01J23/75
- IPC分类号: B01J23/75 ; B01J23/86 ; C07B61/00 ; C07C209/72 ; C07C211/35
摘要:
The present invention is related to a method for preparation of cyclohexylamine by hydrogenating aniline at a temperature of 150.degree. to 250.degree. C. under a hydrogen pressure of 1 to 20 atm in the presence of a catalyst selected from a chromium- or thorium- modified cobalt boride, wherein the amount of said modified cobalt boride is at least 0.6 wt % based on the weight of aniline. Compared with the prior art which used a conventional hydrogenation catalyst such as ruthenium, palladium, Raney cobalt or Raney nickel, the method adopted by the present invention has the advantages in that it can be performed under a relatively lower hydrogen pressure without necessity of adding any coupling inhibitors and a much higher aniline conversion and a higher or comparable selectivity to cyclohexylamine can be obtained, thus resulting in greatly increased yield of cyclohexylamine.
公开/授权文献
- US5216694A Trellis coding for fractional bits 公开/授权日:1993-06-01