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    PROCESS FOR PREPARING TERTIARY ALKYL ESTERS OF (METH) ACRYLIC ACID HAVING AT LEAST 4 CARBON ATOMS IN THE ALKYL RADICAL
    1.
    发明申请
    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

    公开(公告)号：US20090023947A1

    公开(公告)日：2009-01-22

    申请号：US12168342

    申请日：2008-07-07

    申请人： Gunter Lipowsky ,  Joachim Wulff-Doring ,  Peter Zurowski ,  Jurgen Strasser

    发明人： Gunter Lipowsky ,  Joachim Wulff-Doring ,  Peter Zurowski ,  Jurgen Strasser

    IPC分类号： C07C69/54

    CPC分类号： C07C67/54 ,  C07C67/04 ,  C07C67/62 ,  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.

    摘要翻译： 一种制备烷基中具有至少4个碳原子的（甲基）丙烯酸叔烷基酯的方法，包括以下步骤：（1）使（甲基）丙烯酸与至少一种通式Ⅰ的烯烃反应： 其中R1和R2是烷基，R3是氢原子，烷基，环烷基，芳基，烷基环烷基，烷基芳基，环烷基芳基或烷基环烷基芳基; 在反应器中存在酸性催化剂的同时，（2）将反应混合物（1）从反应器中排出，（3）将排出的反应混合物（2）分离成包含催化剂的混合物（3.1） 和包含烷基中具有至少4个碳原子的（甲基）丙烯酸叔烷基酯的混合物（3.2），和（4）除去具有至少4个碳原子的（甲基）丙烯酸的叔烷基酯 在来自混合物（3.2）的烷基中，其中（5）在方法步骤（4）中，加入至少一种包含至少一个N-氧基的化合物S作为稳定剂。

    Process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical
    2.
    发明授权
    Process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical 有权
    在烷基中具有至少4个碳原子的（甲基）丙烯酸的叔烷基酯的制备方法

    公开(公告)号：US07745658B2

    公开(公告)日：2010-06-29

    申请号：US12168342

    申请日：2008-07-07

    申请人： Gunter Lipowsky ,  Joachim Wulff-Doering ,  Peter Zurowski ,  Juergen Strasser

    发明人： Gunter Lipowsky ,  Joachim Wulff-Doering ,  Peter Zurowski ,  Juergen Strasser

    IPC分类号： C07C69/52

    CPC分类号： C07C67/54 ,  C07C67/04 ,  C07C67/62 ,  C07C69/54

    摘要： The present invention relates to a process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical. The process includes reacting (meth)acrylic acid with at least one olefin of formula (I) in homogeneous phase in the presence of an acidic catalyst in a reactor, discharging the resulting reaction mixture from the reactor, separating the discharged reaction mixture into a first mixture which contains the catalyst and a second mixture which contains the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, and removing the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical from the second mixture in the presence of compound S, which comprises at least one N-oxyl group and is added as a stabilizer.

    摘要翻译： 本发明涉及在烷基中具有至少4个碳原子的（甲基）丙烯酸的叔烷基酯的制备方法。 该方法包括在反应器中在酸性催化剂存在下使（甲基）丙烯酸与至少一种式（I）烯烃均匀相反应，将所得反应混合物从反应器中排出，将排出的反应混合物分离成第一 包含催化剂的混合物和含有烷基中具有至少4个碳原子的（甲基）丙烯酸叔烷基酯的第二混合物，并且除去具有至少4个碳原子的（甲基）丙烯酸的叔烷基酯 在包含至少一个N-氧基并且作为稳定剂加入的化合物S的存在下，来自第二混合物的烷基。