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    Process for the manufacture of 2-ethylhexyl acrylate
    1.
    发明申请
    Process for the manufacture of 2-ethylhexyl acrylate 失效
    制备丙烯酸2-乙基己酯的方法

    公开(公告)号：US20020193623A1

    公开(公告)日：2002-12-19

    申请号：US10113924

    申请日：2002-04-02

    申请人： ATOFINA

    发明人： Jacqueline Bessalem ,  Michel Fauconet ,  Stephane Lepizzera

    IPC分类号： C07C069/52

    CPC分类号： C07C67/08 ,  C07C67/58 ,  C07C69/54

    摘要： 2-Ethylhexyl acrylate is obtained by esterification of acrylic acid (AA) with 2-ethylhexanol (2-EtHexOH), in the presence of at least one stabilizer for AA, with H2SO4 as catalyst, the crude reaction mixture (B1) obtained comprising the desired acrylate, 2-EtHexOH, AA, 2-ethylhexyl hydrogensulphate (2-EtHexSO4H), traces of H2SO4 and impurities. (B1) is washed with water in an extraction column C2 to remove, at the bottom, the aqueous phase (A1), the top organic phase (O2) being sent to a topping column C3 to obtain, at the top, the AA and the 2-EtHexOH, which are recycled to the esterification, the topped desired acrylate being sent to a distillation column C4, from where it exits, purified from the heavy products; a stage of hydrolysis of the 2-EtHexSO4H present in (A1) being carried out to form, in this phase, 2-EtHexOH and H2SO4, the acidic entities resulting from the hydrolysis being neutralized by introduction of a base into the medium, and the resulting aqueous phase (A3) being sent to the recovery of the 2-EtHexOH in a distillation column C1.

    摘要翻译： 丙烯酸2-乙基己酯通过丙烯酸（AA）与2-乙基己醇（2-EtHexOH）在至少一种AA稳定剂的存在下与H 2 SO 4作为催化剂进行酯化而获得，所得的粗反应混合物（B1）包含 所需的丙烯酸酯，2-EtHexOH，AA，2-乙基己基硫酸氢盐（2-EtHexSO 4 H），痕量H 2 SO 4和杂质。 （B1）在萃取塔C2中用水洗涤以在底部除去水相（A1），将顶部有机相（O 2）送至顶部塔C3，以在顶部获得AA和 被再循环至酯化的2-EtHexOH，将顶部所需的丙烯酸酯从其出口排出到蒸馏塔C4中，从重产物中纯化; 在（A1）中存在的2-EtHexSO 4 H的水解阶段在该相中进行以形成2-EtHexOH和H 2 SO 4，由水解产生的酸性实体通过将碱引入培养基而中和， 得到的水相（A3）送入蒸馏塔C1中的2-EtHexOH的回收。