发明授权
- 专利标题: Process for the production of polynuclear aromatic polyamines
- 专利标题(中): 生产多核芳族聚酰胺的方法
-
申请号: US863613申请日: 1992-04-06
-
公开(公告)号: US5196591A公开(公告)日: 1993-03-23
- 发明人: Hartmut Knofel , Michael Brockelt , Marcel Petinaux , Rudolf Uchdorf , Hans-Peter Schal
- 申请人: Hartmut Knofel , Michael Brockelt , Marcel Petinaux , Rudolf Uchdorf , Hans-Peter Schal
- 申请人地址: DEX Leverkusen
- 专利权人: Bayer Aktiengesellschaft
- 当前专利权人: Bayer Aktiengesellschaft
- 当前专利权人地址: DEX Leverkusen
- 优先权: DEX4112131 19910413
- 主分类号: B01J27/08
- IPC分类号: B01J27/08 ; C07B61/00 ; C07C209/78 ; C07C209/82 ; C07C211/50 ; C07C211/54
摘要:
The invention relates to an improved process for the production of polynuclear aromatic polyamines by condensation of aniline with formaldehyde in the presence of water and acidic catalysts and working up of the reaction mixture by extraction with a hydrophobic solvent, the acid catalyst accumulating in the aqueous phase of the extraction step being reused.
公开/授权文献
- US4674377A Apparatus for perforating paper webs and the like 公开/授权日:1987-06-23
信息查询