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    Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation
    104.
    发明专利
    Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation 未知

    公开(公告)号：AU2171001A

    公开(公告)日：2001-07-09

    申请号：AU2171001

    申请日：2000-12-21

    Applicant: BASF AG

    Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  RUST HARALD ,  SCHULZ GERHARD

    IPC: C07B61/00 ,  C07C29/80 ,  C07C31/22 ,  C07C29/141

    Abstract: A process is disclosed for the purification, by distillation, of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal, said process including the following steps:(a) reaction of n-butyraldehyde with formaldehyde in the presence of catalytic amounts of a tertiary amine, and hydrogenation of the resulting mixture to give a mixture containing trimethylolpropane;(b) separation of water, methanol, trialkylamine and/or trialkylammonium formate by distillation;(c) heating of the residue obtained in (b) under reduced pressure to a temperature at which TMP is volatile and compounds boiling above TMP are cleaved, in order to separate off, by distillation, TMP and compounds more volatile than TMP;(d) distillation of the distillate obtained in (c) in order to separate off the more volatile compounds and recover pure TMP; and(e) optional distillation of the TMP obtained in (d) in order to recover TMP with a low APHA color index.A process is also disclosed in which trialkylammonium formate is distilled under mild conditions from crude mixtures of polyhydric alcohols, predominantly trimethylolpropane.

    105.
    发明专利
    未知

    公开(公告)号：DE19963435A1

    公开(公告)日：2001-07-05

    申请号：DE19963435

    申请日：1999-12-28

    Applicant: BASF AG

    Inventor： DERNBACH MATTHIAS ,  KRATZ DETLEF ,  STAMMER ACHIM ,  RUST HARALD ,  SCHULZ GERHARD

    IPC: C07B61/00 ,  C07C29/80 ,  C07C31/22

    Abstract: The invention relates to a method for carrying out the pure distillation of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal with the following steps: (a) reacting n-butyraldehyde with formaldehyde in the presence of catalytic quantities of a tertiary amine and hydrogenating the mixture that is obtained in such a manner in order to form a mixture containing trimethylolpropane; (b) separating water, methanol, trialkylamine and/or trialkylammonium formate by distillation; (c) heating the remainder obtained in (b), under a vacuum, to a temperature at which TMP is volatile and at which compounds that boil at temperatures greater than that of TMP are cleaved while separating by distillation TMP as well as compounds that are less volatile than TMP; (d) distilling the distillate obtained in (c) while separating out the less volatile compounds and obtaining pure TMP; (e) carrying out the facultative distillation of the TMP obtained in (d) in order to obtain TMP that has a low alpha color index. The invention also relates to a method in which trialkylammonium formate is separated by distillation, while preserving the same, from raw mixtures consisting of polyvalent alcohols, mainly of trimethylolpropane.

    106.
    发明专利
    未知

    公开(公告)号：BR9909820A

    公开(公告)日：2000-12-19

    申请号：BR9909820

    申请日：1999-04-19

    Applicant: BASF AG

    Inventor： FISCHER MARTIN ,  STAMMER ACHIM ,  QUAISER STEFAN

    IPC: C01B15/01 ,  C01B15/013 ,  C01B15/029 ,  H01L21/306

    Abstract: Disclosed are a highly pure aqueous hydrogen peroxide solution for use in the electronics industry and a process for the preparation of such solutions, which are essentially free from organics, which comprises catalytically converting hydrogen and oxygen, electrochemically reducing oxygen or electrolyzing an acidic ammonium sulfate solution, in each case in water and with the exclusion of organic compounds and materials which release such compounds.

    107.
    发明专利
    未知

    公开(公告)号：NO20005281L

    公开(公告)日：2000-11-13

    申请号：NO20005281

    申请日：2000-10-20

    Applicant: BASF AG

    Inventor： FISCHER MARTIN ,  STAMMER ACHIM ,  QUAISER STEFAN

    IPC: C01B15/01 ,  C01B15/013 ,  C01B15/029 ,  H01L21/306

    Abstract: Disclosed are a highly pure aqueous hydrogen peroxide solution for use in the electronics industry and a process for the preparation of such solutions, which are essentially free from organics, which comprises catalytically converting hydrogen and oxygen, electrochemically reducing oxygen or electrolyzing an acidic ammonium sulfate solution, in each case in water and with the exclusion of organic compounds and materials which release such compounds.

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