PROCESS FOR MAKING BUTYROLACTONES
    72.
    发明专利

    公开(公告)号:DE3164363D1

    公开(公告)日:1984-08-02

    申请号:DE3164363

    申请日:1981-03-04

    Applicant: BASF AG

    Abstract: A process for the preparation of a butyrolactone of the general formula I where R1 is unsubstituted or substituted alkyl or phenyl and R2 to R6 are hydrogen or unsubstituted or substituted alkyl or phenyl, wherein a gamma -formylcarboxylic acid ester of the formula II where R is lower alkyl, is treated with oxygen at an elevated temperature of 60 DEG -150 DEG C.

    80.
    发明专利
    未知

    公开(公告)号:ES2122724T3

    公开(公告)日:1998-12-16

    申请号:ES96100052

    申请日:1996-01-04

    Applicant: BASF AG

    Abstract: In the sepn. of (meth)acrylic acid (I) from mixts. by rectification, in which (I) is discharged from the column at a point higher than the inlet for the mixt., the refluxing liq. is removed in at least one position of the column, the oligomerised and/or polymerised (I) is sepd. and the liq. is recycled to the column.

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