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    VERFAHREN ZUR HERSTELLUNG VON POLYMETHYLOLEN
    7.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON POLYMETHYLOLEN 有权
    用于生产POLYMETHYLOLEN

    公开(公告)号：EP2385933A1

    公开(公告)日：2011-11-16

    申请号：EP10700515.9

    申请日：2010-01-07

    Applicant: BASF SE

    Inventor： SCHLITTER, Stephan ,  STEINIGER, Michael ,  RITTINGER, Stefan ,  SIRCH, Tilman ,  MAAS, Steffen

    IPC: C07C29/141 ,  C07C45/75 ,  C07C45/82

    CPC classification number: C07C29/80 ,  C07C29/141 ,  C07C45/75 ,  C07C45/82 ,  C07C31/22 ,  C07C31/245 ,  C07C47/19

    Abstract: The present invention relates to a process for recovering components from a low boiler mixture which is obtained in the distillation of hydrogenation effluents from the preparation of polymethylols, by multistage distillation of the low boiler mixture comprising a tertiary amine, water, methanol, polymethylol of the formula (I) methylolalkanal of the formula (II) alcohol of the formula (III) and an alkanal with a methylene group in the α position to the carbonyl group, and in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, a first distillation stage involving separating the low boiler mixture into a higher-boiling, predominantly water-rich fraction and into a lower-boiling aqueous organic fraction comprising the tertiary amine, and the second distillation stage involving separating the aqueous organic fraction from the first distillation stage into a predominantly amine-containing fraction and a further amine-depleted fraction, wherein the tertiary amine is trimethylamine or triethylamine, and the bottom temperature in the second distillation stage is 110° C. and more.

    VERFAHREN ZUR HERSTELLUNG VON 1,4- BUTANDIOL
    9.
    发明授权
    VERFAHREN ZUR HERSTELLUNG VON 1,4- BUTANDIOL 有权
    用于生产1,4丁二醇

    公开(公告)号：EP1515932B1

    公开(公告)日：2010-06-16

    申请号：EP03757050.4

    申请日：2003-06-10

    Applicant: BASF SE

    Inventor： HESSE, Michael ,  SCHLITTER, Stephan ,  BORCHERT, Holger ,  SCHUBERT, Markus ,  RÖSCH, Markus ,  BOTTKE, Nils ,  FISCHER, Rolf-Hartmuth ,  WECK, Alexander ,  WINDECKER, Gunther ,  HEYDRICH, Gunnar

    IPC: C07C29/149 ,  C07C31/20

    CPC classification number: C07C29/149 ,  Y02P20/582 ,  C07C31/207

    Abstract: The invention relates to a method for producing optionally alkyl-substituted 1,4-butanediol by means of two-stage catalytic hydration in the gas phase, comprising the following steps: a) a gas stream of C4-dicarboxylic acid or a derivative thereof is fed into a first reactor and the gas phase is catalytically hydrated so as to obtain a product mainly containing optionally alkyl-substituted y-butyrolactone; b) the obtained product stream is fed into a second reactor and the gas phase is catalytically hydrated so as to obtain optionally alkyl-substituted 1,4-butanediol; c) the desired product is separated from intermediate products, by-products, and an optionally unreacted starting material. A catalyst comprising = 95 percent by weight of CuO and = 5 percent by weight of an oxidic carrier is used in each hydration stage. The product mixture obtained in the first hydration step is introduced into the second hydration stage without further cleaning said product mixture.

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