发明授权
- 专利标题: Process for the purification of nicotinic acid amide I
- 专利标题(中): 烟酰胺I的纯化方法
-
申请号: US288186申请日: 1981-07-29
-
公开(公告)号: US4447615A公开(公告)日: 1984-05-08
- 发明人: Helmut Beschke , Franz-Ludwig Dahm , Heinz Friedrich , Gunter Prescher
- 申请人: Helmut Beschke , Franz-Ludwig Dahm , Heinz Friedrich , Gunter Prescher
- 申请人地址: DEX Frankfurt
- 专利权人: Degussa Aktiengesellschaft
- 当前专利权人: Degussa Aktiengesellschaft
- 当前专利权人地址: DEX Frankfurt
- 优先权: DEX3028904 19800730
- 主分类号: C07D213/82
- IPC分类号: C07D213/82 ; C07D213/81 ; C07D211/72 ; C07D211/84 ; C07D213/56
摘要:
Crude nicotinamide is purified by a recrystallization and in this way freed especially from nicotinic acid and salts of nicotinic acid. As solvent there is used a 2-methylpropanol-1 containing water. The recrystallization takes place at a pH between about 7 and 10.
公开/授权文献
信息查询
IPC分类: