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    12.
    发明专利
    未知

    公开(公告)号：DE10160180A1

    公开(公告)日：2003-06-18

    申请号：DE10160180

    申请日：2001-12-07

    Applicant: BASF AG

    Inventor： SIRCH TILMAN ,  KAIBEL GERD ,  WARTINI ALEXANDER ,  DERNBACH MATTHIAS

    IPC: C07C29/38 ,  C07B61/00 ,  C07C29/141 ,  C07C29/80 ,  C07C31/22

    Abstract: Trimethylol propane is isolated from a reaction mixture, obtained by reaction of n-butyraldehyde with formaldehyde in the presence of a base and optional hydrogenation of the mixture obtained. The mixture is distilled using a partition column or a distillation column with a pre-column or a distillation column with a post-column. The method is characterised by a low investment and energy cost and the reduced formation of high-boiling by-products.

    PROCEDIMIENTO PARA LA PRODUCCION DE 1,6-HEXANODIOL.
    15.
    发明专利
    PROCEDIMIENTO PARA LA PRODUCCION DE 1,6-HEXANODIOL. 未知

    公开(公告)号：ES2270165T3

    公开(公告)日：2007-04-01

    申请号：ES03799469

    申请日：2003-12-03

    Applicant: BASF AG

    Inventor： FISCHER ROLF-HARTMUTH ,  KRUG THOMAS ,  HAUNERT ANDREA ,  ROPER MICHAEL ,  SIRCH TILMAN ,  STUER WOLFRAM

    IPC: C07C29/17 ,  C07C29/149 ,  C07C31/20 ,  C07C67/347 ,  C07C69/593

    Abstract: Procedimiento para la producción de 1,6-hexanodiol con una pureza de >_99,5% en peso mediante dimerización catalítica de ésteres del ácido acrílico e hidrogenación catalítica de los diésteres del ácido hexenodioico así obtenidos para dar 1,6-hexanodiol, en el que a) se dimeriza el éster del ácido acrílico de C1 a C8 en presencia al menos de un compuesto de rodio para dar mezclas predominantemente de diésteres de los ácidos 2 y 3-hexenodioico, b) se hidrogena el producto de salida de la dimerización obtenido en presencia de catalizadores que contienen predominantemente cobre como componente de hidrogenación, libres de cromo y c) se purifica el 1,6-hexanodiol bruto así obtenido mediante la destilación fraccionada.

    17.
    发明专利
    未知

    公开(公告)号：DE102004054047A1

    公开(公告)日：2006-05-11

    申请号：DE102004054047

    申请日：2004-11-05

    Applicant: BASF AG

    Inventor： SIRCH TILMAN ,  TEBBEN GERD-DIETER ,  HECK LUDWIG E ,  DIEFENBACHER ARMIN ,  KRAUSE ALFRED ,  BORGEL FRANZ

    IPC: C07C31/20 ,  C07C27/04

    Abstract: The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-containing gases and by water extraction of the reaction mixture, by esterification of the acids and hydrogenation, in which a) the mono- and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters, b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage, c) a separation of the bottom product is carried out in a second distillation stage into an ester fraction substantially free of 1,4-cyclohexanediols and a fraction comprising at least the majority of the 1,4-cyclohexanediols, d) the ester fraction substantially free of 1,4-cyclohexanediols is catalytically hydrogenated and e) 1,6-hexanediol is obtained in a purifying distillation stage from the hydrogenation effluent while removing an alcohol-low boiler mixture in a manner known per se, wherein alcohol is removed by a membrane system from the mixtures, obtained after the esterification in stage b) and/or after the hydrogenation in stage e), of alcohols and low boilers and recycled into the esterification.

    18.
    发明专利
    未知

    公开(公告)号：BR0312954A

    公开(公告)日：2005-06-14

    申请号：BR0312954

    申请日：2003-07-18

    Applicant: BASF AG

    Inventor： WARTINI ALEXANDER ,  SIRCH TILMAN ,  MELDER JOHANN-PETER ,  DERNBACH MATTHIAS

    IPC: C07C29/10 ,  C07C29/141 ,  C07C29/88 ,  C07C45/75

    Abstract: The invention relates to a method for increasing yield in the production of polyvalent alcohols, especially trimethylolpropane, obtained by condensing formaldehyde with a higher aldehyde. According to the inventive method, acid treatment is carried out on a mixture (high-boiling fraction) that is obtained by reprocessing, contains derivatives of said alcohols and has a higher boiling point than the respective alcohol, and the polyvalent alcohol is recovered from the acid-treated high-boiling fraction. The inventive method is characterised in that the water content of the high-boiling fraction amounts to between 20 and 90 wt. % in relation to the entire mixture of the high-boiling fraction and water.

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