发明授权
- 专利标题： Abietic acid derivatives and their use as emulsifiers
- 专利标题（中）： 琥珀酸衍生物及其作为乳化剂的用途
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申请号： US510836申请日： 1990-04-18
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公开(公告)号： US5456861A公开(公告)日： 1995-10-10
- 发明人: Karl-Erwin Piejko , Dieter Constant , Christian Lindner , Claus Wulff
- 申请人： Karl-Erwin Piejko , Dieter Constant , Christian Lindner , Claus Wulff
- 申请人地址： DEX Leverkusen
- 专利权人： Bayer AG
- 当前专利权人： Bayer AG
- 当前专利权人地址： DEX Leverkusen
- 优先权： DEX3913680.9 19890426; DEX3926118.2 19890808
- 主分类号： C07C51/44
- IPC分类号： C07C51/44 ; C07C51/48 ; C07C51/487 ; C07C61/29 ; C08F2/24 ; C08F2/26 ; B01F17/00
摘要：
Process for pretreating abietic acid derivatives comprising dissolving an abietic derivative in water to form a 2 to 25% by weight solution, adding a base so that the pH of the solution is from 10 to 14 and removing from 0.5 to 25% by weight of the abietic acid derivative originally present in the solution by extraction or steam distillation while maintaining the pH from 10 to 14.