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    73.
    发明专利
    未知

    公开(公告)号：ES2198914T3

    公开(公告)日：2004-02-01

    申请号：ES99924922

    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.

    74.
    发明专利
    未知

    公开(公告)号：DE59709929D1

    公开(公告)日：2003-05-28

    申请号：DE59709929

    申请日：1997-11-18

    Applicant: BASF AG

    Inventor： ELLER KARSTEN ,  SIGWART CHRISTOPH ,  BECKER RAINER ,  PLITZKO KLAUS-DIETER ,  FISCHER ROLF ,  STEIN FRANK ,  MUELLER ULRICH ,  HESSE MICHAEL

    IPC: B01J23/24 ,  C08G65/10 ,  C08G65/20 ,  C08G65/26 ,  C08G65/28

    Abstract: Polytetrahydrofuran, tetrahydrofuran copolymers, diesters or monoesters of these polymers are prepared by polymerizing tetrahydrofuran in the presence of at least one telogen and/or comonomer on a heterogeneous carrier catalyst which contains on an oxidic carrier material as active mass a catalytically active amount of at least one oxygenous molybdenum and/or tungsten compound and, when the precursor compounds of the active mass have been applied to the carrier material precursor, has been calcined at temperatures of between 500° C. and 1000° C. The catalyst used contains a promotor which comprises at least one element or a compound of an element of the 2nd, 3rd including the lanthanides, 5th, 6th, 7th, 8th or 14th group of the periodic system of elements.

    76.
    发明专利
    未知

    公开(公告)号：ES2174509T3

    公开(公告)日：2002-11-01

    申请号：ES98955468

    申请日：1998-10-16

    Applicant: BASF AG

    Inventor： FISCHER ROLF HARTMUTH ,  PINKOS ROLF ,  STEIN FRANK

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

    Abstract: A process for the preparation of 1,6-hexanediol and 6-hydroxycaproic acid or esters thereof by catalytic hydrogenation of adipic acid, adipic acid monoesters or adipic acid diesters or streams of starting material which contain adipic acid or esters thereof as essential constituents, in which the bottom product obtained in the distillation of the hydrogenation product, following removal of the hexanediol and hydroxycaproic acid or esters thereof, and essentially comprises oligomeric esters of 6-hydroxycaproic acid, is recycled to the hydrogenation, and the resulting mixture of starting material and recycle stream is reacted at from 100 to 300°C., at from 10 to 300 bar in the liquid phase and at a molar ratio of carboxyl groups to be hydrogenated to hydrogen in the reactor of from 1:5 to 1:100 on hydrogenation catalysts is described.

    77.
    发明专利
    未知

    公开(公告)号：DE10100552A1

    公开(公告)日：2002-07-11

    申请号：DE10100552

    申请日：2001-01-09

    Applicant: BASF AG

    Inventor： GALL MARTIN ,  KAIBEL GERD ,  KRUG THOMAS ,  RUST HARALD ,  STEIN FRANK

    IPC: C07D309/30 ,  B01D3/14 ,  C07C29/80 ,  C07C31/20 ,  C07D315/00 ,  C07D313/04 ,  C07B63/00 ,  B01D3/00

    Abstract: The invention relates to a method for the distillative processing of the crude products 1,6-hexandiols (HDO), 1,5-pentandiol (PDO) or caprolactone (CLO) obtained according to the method of German patent application DE-A 196 07 954 in order to obtain the corresponding pure products. The distillative processing proceeds in a separation column (TK) in which a separating wall (T) is arranged in the column longitudinal direction forming an upper common column section (1), a lower common column section (6), a feed part (2, 4) with reinforcement part (2) and drive part (4), and a removal part (3, 5) with output part (3) and reinforcement part (5). The corresponding crude product HDO, PDO or CLO is fed in the center section of the feed part (2, 4), the high-boiling fraction (C) is removed from the column sump, the low-boiling fraction (A) is removed via the column head and the medium-boiling fraction (B) is removed from the center section of the removal part (3, 5). The inventive method can also be carried out in thermally coupled columns.

    78.
    发明专利
    未知

    公开(公告)号：DE10061557A1

    公开(公告)日：2002-06-13

    申请号：DE10061557

    申请日：2000-12-11

    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 ,  C07B41/00

    Abstract: The invention relates to a method for the gas phase hydrogenation of C4 dicarboxylic acids and/or derivatives thereof to give optionally substituted gamma -butyrolactone and/or tetrahydrofuran on a catalyst, based on copper oxide, comprising a first reaction zone, in which the C4 dicarboxylic acid and/or derivatives thereof react to give a mixture mainly containing optionally substituted gamma -butyrolactone and a second zone connected thereto in which the optionally substituted gamma -butyrolactone contained in the mixture from the first hydrogenation stage is reacted to give optionally substituted tetrahydrofuran at a temperature which is lower than the temperature in the first hydrogenation step.

    79.
    发明专利
    未知

    公开(公告)号：DE59803387D1

    公开(公告)日：2002-04-18

    申请号：DE59803387

    申请日：1998-12-10

    Applicant: BASF AG

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