发明授权
- 专利标题: Process for the production of cyanamide
- 专利标题(中): 生产氰胺的方法
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申请号: US747758申请日: 1991-08-20
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公开(公告)号: US5166432A公开(公告)日: 1992-11-24
- 发明人: Jens Weitkamp , Stefan Ernst , Heinrich Rock , Kurt Scheinost , Benedikt Hammer , Werner Goll , Horst Michaud
- 申请人: Jens Weitkamp , Stefan Ernst , Heinrich Rock , Kurt Scheinost , Benedikt Hammer , Werner Goll , Horst Michaud
- 申请人地址: DEX Trostbert
- 专利权人: SKW Trostberg Aktiengesellshaft
- 当前专利权人: SKW Trostberg Aktiengesellshaft
- 当前专利权人地址: DEX Trostbert
- 优先权: DEX4026364 19900821
- 主分类号: B01J29/04
- IPC分类号: B01J29/04 ; B01J29/12 ; B01J29/46 ; B01J29/85 ; C01B21/087 ; C01C3/16 ; C07C261/04
摘要:
The present invention provides a process for the production of cyanamide from urea and/or decomposition products thereof at an elevated temperature with the use of a microporous catalyst, wherein, as catalyst, there is used a zeolite and/or a silicoalumophosphate which is doped with transition metal cations selected from the Group IB and VIIB of the Periodic System. In this way, it is possible to increase the conversion, referred to urea, to 60 to 100%, the selectivity with regard to cyanamide thereby being from about 30 to 50% and with regard to the undesired melamine being .ltoreq.2%.