PROCEDE DE PURIFICATION DE LA FRACTION AZEOTROPIQUE GENEREE LORS DE LA SYNTHESE DE L'ACRYLATE DE N,N-DIMETHYL AMINOETHYLE
    1.
    发明公开
    PROCEDE DE PURIFICATION DE LA FRACTION AZEOTROPIQUE GENEREE LORS DE LA SYNTHESE DE L'ACRYLATE DE N,N-DIMETHYL AMINOETHYLE 有权
    清理n的合成期间METHODS,N-二甲基氨基生产的共沸GROUP

    公开(公告)号:EP2382182A1

    公开(公告)日:2011-11-02

    申请号:EP10707592.1

    申请日:2010-01-27

    申请人: Arkema France

    IPC分类号: C07C213/06

    CPC分类号: C07C213/10 C07C219/20

    摘要: The invention relates to a method for producing N,N-dimethylaminoethyl acrylate by the transesterification reaction of an alykl acrylate by N1N-dimethylaminoethanol, and more particularly relates to a method for purifying the azeotropic fraction generated during said reaction, thereby enabling the recycling thereof on the alkyl acrylate production unit. The aim of the method of the invention is in particular to remove the acetaidehyde and the dialkoxyethane contained in the azeotropic fraction, either by the direct distillation of the azeotropic fraction or by the distillation of the aqueous phase resulting from the water scrubbing of the azeotropic fraction.

    PROCEDE PERFECTIONNE DE FABRICATION DE (METH)ACRYLATES D'ALKYLE PAR ESTERIFICATION DIRECTE
    2.
    发明公开
    PROCEDE PERFECTIONNE DE FABRICATION DE (METH)ACRYLATES D'ALKYLE PAR ESTERIFICATION DIRECTE 审中-公开
    用于生产烷基(甲基)改进方法丙烯酸BY直接酯化

    公开(公告)号:EP1871736A1

    公开(公告)日:2008-01-02

    申请号:EP06743642.8

    申请日:2006-04-06

    申请人: Arkema France

    IPC分类号: C07C67/08 C07C69/54

    CPC分类号: C07C67/08 C07C69/54

    摘要: The invention concerns a improved method for making linear, branched or cyclic C1-C15 alkyl (meth)acrylates, by direct esterification of (meth)acrylic acid with a corresponding alcohol, said reaction being catalyzed by sulfuric acid. The method includes a step of hydrolyzing (11) the neutralizing aqueous flow (9) followed by extraction (13) of the residual (meth)acrylic acid with a solvent (15) consisting entirely or partly of the alcohol used in the reaction. The invention enables organic pollution (COD) released in the final aqueous effluents (24) of the process to be reduced, as well as productivity to be increased.

    PROCEDE AMELIORE DE FABRICATION D'ANHYDRIDE (METH)ACRYLIQUE
    4.
    发明公开
    PROCEDE AMELIORE DE FABRICATION D'ANHYDRIDE (METH)ACRYLIQUE 有权
    改进的方法制备(甲基)ACRYLANHYDRIDS

    公开(公告)号:EP1805128A1

    公开(公告)日:2007-07-11

    申请号:EP05809097.8

    申请日:2005-10-18

    申请人: ARKEMA France

    发明人: PAUL, Jean-Michel

    IPC分类号: C07C57/075

    摘要: The invention relates to an improved method for the production of (meth)acrylic anhydride by transanhydrification between (meth)acrylic acid and acetic anhydride in the presence of air and presence of at least one polymerization inhibitor, characterized in that the polymerization inhibitor is chosen from the group consisting of (a) metallic salts of thiocarbamic acid or dithiocarbamic acid and mixtures thereof with a phenol derivative or phenothiazine and the derivatives thereof, and (b) N-oxyl compounds mixed with 2,6-diterbutyl 4-methyl phenol taken on its own in the presence of 2,4-dimethyl 6-terbutyl phenol.

    PROCÉDÉ PERFECTIONNE DE FABRICATION DE (MÉTH)ACRYLATES D'ALKYLE
    9.
    发明公开
    PROCÉDÉ PERFECTIONNE DE FABRICATION DE (MÉTH)ACRYLATES D'ALKYLE 审中-公开
    PROCÉDÉPERFECTIONNE DE FABRICATION DE(MÉTH)ACRYLATES D'ALKYLE

    公开(公告)号:EP3174844A1

    公开(公告)日:2017-06-07

    申请号:EP15735994.4

    申请日:2015-06-22

    申请人: Arkema France

    IPC分类号: C07C67/08 C07C69/54

    摘要: The present invention relates to a method for producing a C
    4 -C
    10 alkyl (meth)acrylate, by direct esterification of (meth)acrylic acid by the corresponding alcohol, the reaction water being removed in the form of an azeotrope with the esterification alcohol from a distillation column mounted over the esterification reactor comprising a cationic resin as a catalyst. Said method is characterized in that the molar ratio of alcohol to acid at the inlet of the reactor is between 1.4 and 3, and in that the crude reaction mixture circulates in a recirculation loop joining the reactor and the water removal column, at a recirculation rate of between 6 and 25, expressed by the mass ratio between the flow fed into the loop and the flow sent to a purification treatment.

    摘要翻译: (甲基)丙烯酸直接酯化制备(甲基)丙烯酸C 4 -C 10烷基酯的方法本发明涉及通过用相应的醇直接酯化(甲基)丙烯酸来制备(甲基)丙烯酸C 4 -C 10烷基酯的方法,反应水以与酯化醇形成共沸物的形式从 安装在包含阳离子树脂作为催化剂的酯化反应器上的蒸馏塔。 所述方法的特征在于,反应器入口处的醇与酸的摩尔比在1.4和3之间,并且粗反应混合物在连接反应器和脱水塔的再循环回路中以再循环率 在6和25之间,由送入回路的流量与送至净化处理的流量之间的质量比表示。