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    57.
    发明专利
    未知

    公开(公告)号：DE59505830D1

    公开(公告)日：1999-06-10

    申请号：DE59505830

    申请日：1995-09-30

    Applicant: BASF AG

    Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

    IPC: C07C57/07 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54

    Abstract: In the sepn. of a di(meth)acrylate (I) of a 4-6 C alkandiol (II) from a mixt. of (II), the mono(meth) acrylate (III) and (I) by extn. with an organic solvent (IV) in the presence of water, the mixt. contg. (I) is supplied to the middle of an extn. column and water and (V) are passed through the column in countercurrent. Also claimed is the prepn. (III), esp. butan-1,4-diol monoacrylate (IIIA).

    58.
    发明专利
    未知

    公开(公告)号：DK0706990T3

    公开(公告)日：1999-02-08

    申请号：DK95115503

    申请日：1995-09-30

    Applicant: BASF AG

    Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

    IPC: B01D11/04 ,  C07B61/00 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54

    Abstract: In the prepn. of a mono(meth)acrylate (I) of a 4-6 C alkandiol (II) from an aq. soln. contg. (I) and (II) by solvent extn., the organic solvent used for extn. is selected from esters (III) of 1-4 C alkanecarboxylic acids and 1-5 C alkanols, simple and mixed 4-8 C dialkyl ethers (IV) and mixts. of these. Also claimed is a method of prepn. and sepg. (I).

    PROCESS OF CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID AND APPARATUS FOR MAKING THE SAME
    59.
    发明专利
    PROCESS OF CONTINUOUS PREPARATION OF ALKYL ESTERS OF (METH)ACRYLIC ACID AND APPARATUS FOR MAKING THE SAME 未知

    公开(公告)号：CZ273696A3

    公开(公告)日：1998-05-13

    申请号：CZ273696

    申请日：1996-09-18

    Applicant: BASF AG

    Inventor： EXNER HERBERT DR ,  BAUR KARL DR ,  DOCKNER TONI DR ,  POTTHOFF CHRISTINE ,  DAMS ALBRECHT DR

    IPC: C07C67/08 ,  C07C67/54 ,  C07C69/54

    Abstract: The continuous prodn. of alkyl(meth)acrylates (I) by the reaction of (meth)acrylic acid (II) and 1-8C monohydric alcohols (III) in homogeneous liq. phase at elevated temp. in the absence of solvent and in presence of an acid esterification catalyst (IV). The process comprises (a) feeding (II), (III) and (IV) continuously into a reaction zone (RZ), (b) removing (I) after a residence time in the form of an azeotrope contg. water or water and (III) in addn. to (I) at the top of a rectifier column (RC) mounted over the RZ, (c) separating the distillate into an organic phase contg. (I) and aq. phase(s) contg. water, (d) recycling part of the organic phase via the top of the column and opt. returning water to the RZ, (e) separating (I) from the rest of the organic phase and removing part of the reaction mixt. continuously from the RZ. The RZ consists of a cascade of at least two reactors in series, and the outflow from one reactor provides the input flow for the next reactor. Also claimed is an appts. for this process.

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