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    VERFAHREN ZUR KONTINUIERLICHEN GEWINNUNG VON (METH)ACRYLSÄURE
    4.
    发明公开
    VERFAHREN ZUR KONTINUIERLICHEN GEWINNUNG VON (METH)ACRYLSÄURE 审中-公开
    法的（甲基）丙烯酸的连续制造

    公开(公告)号：EP1383727A1

    公开(公告)日：2004-01-28

    申请号：EP02735196.4

    申请日：2002-03-28

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： MACHHAMMER, Otto ,  ADAMI, Christoph ,  HECHLER, Claus ,  SCHRÖDER, Jürgen ,  SCHLIEPHAKE, Volker ,  THIEL, Joachim ,  DIEHL, Volker

    IPC分类号： C07C51/46

    CPC分类号： C07C51/44 ,  B01D3/225 ,  C07C51/48 ,  C07C57/04

    摘要： The invention relates to a method for the continuous extraction of (meth)acrylic acid from the reaction gas of catalytic gas phase oxidation. The inventive method comprises the following steps: (I) the reaction gas is quenched by evaporative cooling using a high-boiling solvent; (II) the (meth)acrylic acid is separated from the quenched reaction gas by absorption in the high-boiling solvent; (III) the solvent loaded with (meth)acrylic acid is split into a first partial flow (IIIA) mostly containing (meth)acrylic acid and a second partial flow (IIIB) mostly containing the solvent; (IV) flow (IIIB) is sent back to step (II); and (V) (meth)acrylic acid is extracted from flow (IIIA) by distillation, all remaining liquid flows produced in step (V) being sent back to step (I).

    VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE UND METHACRYLSÄURE
    5.
    发明授权
    VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE UND METHACRYLSÄURE 有权
    用于生产丙烯酸和甲基丙烯酸

    公开(公告)号：EP1015410B2

    公开(公告)日：2007-09-26

    申请号：EP98948948.9

    申请日：1998-09-09

    申请人： BASF Aktiengesellschaft

    发明人： ECK, Bernd ,  MACHHAMMER, Otto ,  PROLL, Theo ,  SCHLIEPHAKE, Volker ,  THIEL, Joachim ,  BRÖLLOS, Klaus

    IPC分类号： C07C51/43

    CPC分类号： C07C51/43 ,  C07C57/04

    摘要： The invention relates to a method for producing acrylic acid and methacrylic acid by producing a gaseous product mixture which essentially has the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4- alkanes, -alkenes, -alkanols or -alkanals or precursors thereof to form acrylic acid or methacrylic acid. The product is separated from the gaseous product mixture according to a method comprising the following steps: a) condensing the gaseous product mixture; b) crystallising the acrylic acid or methacrylic acid from the solution obtained in (a); c) separating the resulting crystals from the mother liquor and d) returning at least a part of the mother liquor from stage (c) to stage (a).

    VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE
    7.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE 审中-公开
    VERFAHREN ZUR HERSTELLUNG VONACRYLSÄURE

    公开(公告)号：EP1098867A1

    公开(公告)日：2001-05-16

    申请号：EP99939391.1

    申请日：1999-07-21

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： ECK, Bernd ,  HEILEK, Jörg ,  SCHLIEPHAKE, Volker ,  PROLL, Theo ,  BRÖLLOS, Klaus ,  MACHHAMMER, Otto ,  THIEL, Joachim

    IPC分类号： C07C51/43 ,  C07C57/07

    CPC分类号： C07C51/43 ,  C07C57/04

    摘要： The invention relates to a method for producing acrylic acid by a) producing a gaseous product mixture which essentially has the composition of a reaction mixture of the catalytic gas phase oxidation of C3-alkanes, -alkenes, -alkanols and/or alkanals and/or precursors thereof to acrylic acid. The method is characterised by b) the condensation of the gaseous product mixture; c) the crystallisation of the acrylic acid from the solution obtained in step b) with partial evaporation of the solution in a vacuum; d) the separation of the crystals obtained from the mother liquor; e) the returning of at least part of the mother liquor from step d) to step b) and f) the returning of at least part of the evaporated solution from step c) to step b).

    摘要翻译： 本发明涉及一种制备丙烯酸的方法，该方法通过a）制备气态产物混合物，该气态产物混合物基本上具有C3-烷烃， - 烯烃， - 链烷醇和/或链烷醛的催化气相氧化反应混合物的组成和/或 其前体转化为丙烯酸。 该方法的特征在于b）气态产物混合物的冷凝; c）从步骤b）中得到的溶液中结晶出丙烯酸并在真空中部分蒸发该溶液; d）从母液中分离得到的晶体; e）将来自步骤d）的至少部分母液返回至步骤b），以及f）将来自步骤c）的至少部分蒸发溶液返回至步骤b）。