发明申请
US20090023947A1 PROCESS FOR PREPARING TERTIARY ALKYL ESTERS OF (METH) ACRYLIC ACID HAVING AT LEAST 4 CARBON ATOMS IN THE ALKYL RADICAL
有权
用于制备具有至少四个碳原子的(甲基)丙烯酸的仲胺酸酯在碱性辐射中的方法
- 专利标题: PROCESS FOR PREPARING TERTIARY ALKYL ESTERS OF (METH) ACRYLIC ACID HAVING AT LEAST 4 CARBON ATOMS IN THE ALKYL RADICAL
- 专利标题(中): 用于制备具有至少四个碳原子的(甲基)丙烯酸的仲胺酸酯在碱性辐射中的方法
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申请号: US12168342申请日: 2008-07-07
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公开(公告)号: US20090023947A1公开(公告)日: 2009-01-22
- 发明人: Gunter Lipowsky , Joachim Wulff-Doring , Peter Zurowski , Jurgen Strasser
- 申请人: Gunter Lipowsky , Joachim Wulff-Doring , Peter Zurowski , Jurgen Strasser
- 申请人地址: DE Ludwigshafen
- 专利权人: BASF SE
- 当前专利权人: BASF SE
- 当前专利权人地址: DE Ludwigshafen
- 优先权: EP07112756.7 20070719
- 主分类号: C07C69/54
- IPC分类号: C07C69/54
摘要:
A process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, comprising the steps of: (1) reacting (meth)acrylic acid with at least one olefin of the general formula I: in which R1 and R2 are an alkyl radical, and R3 is a hydrogen atom, an alkyl radical, a cycloalkyl radical, an aryl radical, an alkylcycloalkyl radical, an alkylaryl radical, a cycloalkylaryl radical, or an alkylcycloalkylaryl radical; in homogeneous phase in the presence of an acidic catalyst in a reactor, (2) discharging the resulting reaction mixture (1) from the reactor, (3) separating the discharged reaction mixture (2) into a mixture (3.1) which comprises the catalyst and a mixture (3.2) which comprises the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, and (4) removing the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical from the mixture (3.2), wherein, (5) in process step (4), at least one compound S which comprises at least one N-oxyl group is added as a stabilizer.