26.
    发明专利
    未知

    公开(公告)号:DE3919226A1

    公开(公告)日:1990-12-20

    申请号:DE3919226

    申请日:1989-06-13

    Applicant: BASF AG

    Abstract: A process for the isolation of trans-1,1,4,4-tetraalkyl-2-butene- 1,4-diols of the formula I … … in which the radicals R , R , R and R are identical or different and are C1- to C5-alkyl groups,… from mixtures with their cis isomer, wherein the trans isomer is separated from the cis isomer by liquid-liquid extraction.

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