PROCESS FOR PREPARING 1,4-BUTANEDIOL BY CATALYTIC HYDROGENATION OF 1,4-BUTINEDIOL

    公开(公告)号:CA2260810C

    公开(公告)日:2005-05-10

    申请号:CA2260810

    申请日:1997-09-23

    Applicant: BASF AG

    Abstract: The invention concerns a process for preparing 1,4-butanediol by continuous catalytic hydrogenation of 1,4-butinediol in that 1,4-butinediol is reacted with hydrogen in the liquid continuous phase in th e presence of a heterogeneous hydrogenation catalyst at temperatures of between 20 and 300 .degree.C, a pressure of between 1 and 20 0 bar and values of the liquid-side mass transfer coefficients k L a, relative to the volume, of between 0.1 s-1 and 1s-1, a) with a catalyst suspended in the reaction medium, wherein, when a packed bubble column is used, it is operated in the upwards mode and at a ratio of the amount of gas leaving the reaction vessel to the amount fed thereto of between 0.99:1 and 0.4:1, or b) is guided upwards in parallel flow throug h a fixed bed reactor operated in the circulating gas mode, the ratio between the amount of gas fed to the reaction vessel and the amount of gas leaving the latter being maintained between 0.99:1 and 0.4:1.

    33.
    发明专利
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    公开(公告)号:DE50008528D1

    公开(公告)日:2004-12-09

    申请号:DE50008528

    申请日:2000-08-23

    Applicant: BASF AG

    Abstract: In a process for preparing GBL by reaction of 1,4 butanediol over a copper catalyst, use is made of a 1,4 butanediol-containing reaction mixture which comprises further alcohols other than 1,4-butanediol and water.

    34.
    发明专利
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    公开(公告)号:AT281444T

    公开(公告)日:2004-11-15

    申请号:AT00964033

    申请日:2000-08-23

    Applicant: BASF AG

    Abstract: In a process for preparing GBL by reaction of 1,4 butanediol over a copper catalyst, use is made of a 1,4 butanediol-containing reaction mixture which comprises further alcohols other than 1,4-butanediol and water.

    37.
    发明专利
    未知

    公开(公告)号:ES2200506T3

    公开(公告)日:2004-03-01

    申请号:ES99910290

    申请日:1999-02-26

    Applicant: BASF AG

    Abstract: A process for the separation by distillation of a mixture of 1,4-butanediol and at least one 4-hydroxybutyraldehyde, its cyclic hemiacetal and its cyclic full acetals with at least one further alcohol by carrying out the distillation in the presence of an alkaline compound. The mixture to be separated preferably contains a cyclic full acetal of 4-hydroxybutyraldehyde with a further alcohol which has a lower boiling point than butanediol and also the further alcohol in free form. The process is particularly suitable for the separation by distillation of mixtures formed in the hydrogenation of maleic acid derivatives.

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