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    PROCESS FOR PREPARING 1, 6 HEXANE DIOL WITH A LEVEL OF PURITY OVER 99%
    151.
    发明专利
    PROCESS FOR PREPARING 1, 6 HEXANE DIOL WITH A LEVEL OF PURITY OVER 99% 未知

    公开(公告)号：MY117553A

    公开(公告)日：2004-07-31

    申请号：MYPI9700831

    申请日：1997-03-01

    Applicant: BASF AG

    Inventor： BREITSCHEIDEL BORIS ,  STEIN FRANK ,  RUST HARALD ,  BAUR KARL GERHARD ,  FISCHER ROLF ,  PINKOS ROLF DR

    IPC: B01J23/80 ,  C07C29/149 ,  B01J23/889 ,  C07B61/00 ,  C07C31/20

    Abstract: 1,6-HEXANEDIOL IS PREPARED FROM A CARBOXYLIC ACID MIXTURE COMPRISING ADIPIC ACID, 6-HYDROXYCAPROIC ACID AND SMALL AMOUNTS OF 1,4- CYCLOHEXANEDIOLS WHICH IS OBTAINED AS A BY-PRODUCT IN THE OXIDATION OF CYCLOHEXANE TO CYCLOHEXANONE/CYCLOHEXANOL BY WATER EXTRACTION OF THE REACTION MIXTURE, BY ESTERIFICATION OF THE ACIDS AND HYDROGENATION WHEREIN A) THE MONOCARBOXYLIC 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) THE BOTTOMS ARE FRACTIONATED IN A SECOND DISTILLATION STAGE TO GIVE AN ESTER FRACTION ESSENTIALLY FREE OF 1,4-CYCLOHEXANEDIOSL AND A FRACTION COMPRISING AT LEAST THE MAJOR PART OF THE 1,4-CYCLOHEXANEDIOLS, D) THE ESTER FRACTION ESSENTIALLY FREE OF 1,4-CYCLOHEXANEDIOLS IS CATALYTICALLY HYDROGENATED AND E) IN A PURE DISTILLATION STAGE, 1,6-HEXANEDIOL IS ISOLATED FROM THE HYDROGENATION PRODUCT IN A MANNER KNOWN PER SE. 3

    METODO PARA PURIFICAR TRIMETILPROPANO, PRODUCIDO MEDIANTE HIDROGENACION, POR MEDIO DE DESTILACION CONTINUA.
    153.
    发明专利
    METODO PARA PURIFICAR TRIMETILPROPANO, PRODUCIDO MEDIANTE HIDROGENACION, POR MEDIO DE DESTILACION CONTINUA. 未知

    公开(公告)号：MXPA02006394A

    公开(公告)日：2002-11-29

    申请号：MXPA02006394

    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

    Abstract: La invencion se refiere a un metodo para llevar a cabo la destilacion pura de trimetilolpropano que proviene de la hidrogenacion de 2,2-dimetilolbutanal a traves de las siguientes etapas: (a) reaccion de n-butiraldehido con formaldehido en presencia de cantidades cataliticas de una amina terciaria e hidrogenacion de la mezcla que se obtiene de tal manera que se forme una mezcla que contiene trimetilopropano; (b) separacion de agua metanol, trialquilamina y/o formato de trialquilamonio mediante destilacion; (c) calentamiento del residuo obtenido en (b), en vacio, a una temperatura en la cual TMP es volatil y a la cual compuestos que hierven a temperaturas mayores que la temperatura de ebullicion de TMP son disociados mientras se separa por destilacion TMP asi como compuestos que son menos volatiles que TMP; (d) destilacion del destilado obtenido en (c) mientras se separan los compuestos -menos volatiles y obtencion de TMP puro; (e) realizacion de la destilacion facultativa del TMP obtenido en (d) con el objeto de obtener TMP que tiene un indice de color alfa bajo. La invencion se refiere tambien al metodo en el cual formato de trialquilamonio es separado por destilacion mientras se conserva, a partir de mezclas brutas que consisten de alcoholes polivalentes, principalmente trimetilolpropano.

    156.
    发明专利
    未知

    公开(公告)号：DE59801387D1

    公开(公告)日：2001-10-11

    申请号：DE59801387

    申请日：1998-01-17

    Applicant: BASF AG

    Inventor： BASSLER PETER ,  LUYKEN HERMANN ,  REHFINGER ALWIN ,  RUST HARALD

    IPC: C07C255/24 ,  C07C253/34

    Abstract: A process for distillative removal of 6-aminocapronitrile from mixtures (I) comprising 6-aminocapronitrile and an imine (II) comprises conducting the distillation in the presence of carbon dioxide.

    Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation
    157.
    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.

    158.
    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.

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