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    42.
    发明专利
    未知

    公开(公告)号：DE19823835A1

    公开(公告)日：1999-12-02

    申请号：DE19823835

    申请日：1998-05-28

    Applicant: BASF AG

    Inventor： LIANG SHELUE ,  FISCHER ROLF HARTMUTH ,  STEIN FRANK ,  WULFF-DOERING JOACHIM

    IPC: B01J23/10 ,  C07B61/00 ,  C07C45/48 ,  C07C49/297 ,  C07C45/54 ,  C07C49/395

    Abstract: The invention relates to a method for producing cyclopentanone by reacting adipic esters of formula (I) R1OOC-(CH2)4-COOR2 in which R1 and R2 represent alkyl radicals having 1 to 12 carbon atoms, cycloalkyl radicals having 5 or 6 carbon atoms, alkyl aryl or aryl radicals, and R2 can represent additional hydrogen, in the presence of oxidic catalysts. According to the inventive method, adipic esters of formula (I) are reacted with less than 5 wt.% of secondary products, said products not being adipic esters in the gas phase when in the presence of water, with a carrier gas, and a) 0.01 to 10 wt.% of at least one metal oxide, selected from the first or second main group of the periodic table or from the group of rare-earth metals, is reacted on titanium oxide or zirconium dioxide acting as a catalyst support, or b) 0.01 to 50 wt.% of at least one metal oxide, selected from the second main group of the periodic table, is reacted on zinc oxide acting as a catalyst support.

    METHOD FOR PRODUCING 1,6-HEXANEDIOL AND 6-HYDROXYCAPROIC ACID OR THEIR ESTERS
    43.
    发明专利
    METHOD FOR PRODUCING 1,6-HEXANEDIOL AND 6-HYDROXYCAPROIC ACID OR THEIR ESTERS 未知

    公开(公告)号：CA2297724A1

    公开(公告)日：1999-05-27

    申请号：CA2297724

    申请日：1998-10-16

    Applicant: BASF AG

    Inventor： PINKOS ROLF ,  FISCHER ROLF HARTMUTH ,  STEIN FRANK

    IPC: C07B61/00 ,  C07C29/149 ,  C07C29/80 ,  C07C31/20 ,  C07C51/367 ,  C07C62/02 ,  C07C67/31 ,  C07C69/675

    Abstract: The invention relates to a method for producing 1,6-hexanediol and 6hydroxycaproic acid or their esters by the catalytic hydrogenation of adipic acid, adipic acid monoesters or adipic acid diesters or educt flows containing adipic acid or its esters as essential constituents. The bottom product obtained when the hydrogenation discharge is distilled after the hexanediol and the hydroxycaproic acid or its esters have been separated off is reintroduced into the hydrogenation process, said bottom product essentially containing oligomeric esters of the 6-hydroxycaproic acid. The resulting mixture of the educt and the return flow is reacted at temperatures of 100 to 300 ~C and at pressures of 10 to 300 bar in the liquid phase and with a molar ratio of carboxyl groups to be hydrogenated to hydrogen in the reactor of 1:5 to 1:100, on hydrogenating catalysts.

    46.
    发明专利
    未知

    公开(公告)号：AT273292T

    公开(公告)日：2004-08-15

    申请号：AT01984809

    申请日：2001-12-07

    Applicant: BASF AG

    Inventor： BORCHERT HOLGER ,  SCHLITTER STEPHAN ,  FISCHER ROLF-HARTMUTH ,  ROESCH MARKUS ,  STEIN FRANK ,  RAHN RALF-THOMAS ,  WECK ALEXANDER ,  KAIBEL GERD

    IPC: C07B61/00 ,  C07D307/08 ,  C07D307/33

    Abstract: The present invention relates to a process for the gas-phase hydrogenation of C4-dicarboxylic acids and/or their derivatives over a catalyst based on copper oxide to give substituted or unsubstituted gamma-butyrolactone and/or tetrahydrofuran, which comprises, which a first reaction zone in which the C4-dicarboxylic acid and/or its derivatives is/are reacted to give a mixture comprising a substituted or unsubstituted gamma-butyrolactone as main product and a subsequent second reaction zone in which the substituted or unsubstituted gamma-butyrolactone present in the mixture from the first hydrogenation step is reacted at a temperature lower than the temperature in the first hydrogenation step to give substituted or unsubstituted tetrahydrofuran.

    PROCESS FOR PREPARING 1, 6 HEXANE DIOL WITH A LEVEL OF PURITY OVER 99%
    47.
    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

    48.
    发明专利
    未知

    公开(公告)号：DE59905197D1

    公开(公告)日：2003-05-28

    申请号：DE59905197

    申请日：1999-05-10

    Applicant: BASF AG

    Inventor： STEIN FRANK ,  KRUG THOMAS ,  GALL MARTIN ,  IFFLAND GABRIELE

    IPC: C07C29/149 ,  C07C31/20 ,  C07C51/47 ,  C07C67/03 ,  C07C67/56 ,  C07C69/44 ,  C07C69/675

    Abstract: A process for preparing 1,6-hexanediol from a carboxylic acid mixture obtained as by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by aqueous extraction of the reaction mixture and comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols by esterification of the acids and hydrogenation, bya) reacting the mono- and dicarboxylic acids in the aqueous dicarboxylic acid mixture with a low molecular weight alcohol to form the corresponding carboxylic esters,b) conducting a first distillation to remove excess alcohol and low boilers from the esterification mixture obtained,c) conducting a second distillation to separate the bottom product into an ester fraction which is essentially free from 1,4-cyclohexanediols and a fraction which includes at least the larger proportion of the 1,4-cyclohexanediols,d) subjecting the ester fraction essentially free from 1,4-cyclohexanediols to a catalytic hydrogenation, ande) subjecting the hydrogenation effluent to a distillation to recover 1,6-hexanediol in a conventional manner,comprises using an aqueous dicarboxylic acid mixture comprising more than 20 ppm of cobalt and more than 40 ppm of phosphorus in the form of phosphate and passing this aqueous dicarboxylic acid mixture through a cation exchanger and after the esterification of step (a) through an anion exchanger.

    50.
    发明专利
    未知

    公开(公告)号：ES2174528T3

    公开(公告)日：2002-11-01

    申请号：ES98963560

    申请日：1998-12-10

    Applicant: BASF AG

    Inventor： BREITSCHEIDEL BORIS ,  PINKOS ROLF ,  STEIN FRANK ,  LIANG SHELUE ,  FISCHER ROLF HARTMUTH

    IPC: C07B61/00 ,  C07C29/149 ,  C07C31/20

    Abstract: A process for producing 1,6-hexanediol by hydrogenation of adipic esters and/or 6-hydroxycaproic esters in the gas phase at elevated temperature and elevated pressure in the presence of chromium-free catalysts comprises hydrogenatinga) over a catalyst comprising copper, manganese and aluminum as essential constituents or over Raney copper,b) at a temperature of from 150 to 230° C. and a pressure of from 10 to 70 bar,c) at a molar ratio of hydrogen to ester to be hydrogenated within the range from 150:1 to 300:1, andd) at a catalyst space velocity of from 0.01 to 0.3 kg of C6 ester per liter of catalyst per hour.

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