公开(公告)号：CA2444804A1

公开(公告)日：2002-10-31

申请号：CA2444804

申请日：2002-04-22

Applicant: BASF AG

Inventor： WECK ALEXANDER ,  KAIBEL GERD ,  RAHN RALF-THOMAS

IPC: C07D307/60 ,  C07C51/215 ,  C07C51/44 ,  C07C51/573 ,  C07C57/145 ,  C07C57/15

Abstract: The invention relates to an improved method for purifying an organic solvent for the purpose of absorbing a maleic acid anhydride from a gaseous mixture. The inventive method is characterized by removing the maleic acid anhydride from the solvent, removing a partial flow from the solvent flow, and distilling said partial flow and returning it to the solvent flow. A low- boiling fraction and a high-boiling fraction are removed from the fraction that substantially consists of purified solvent and the fraction that substantially consists of purified solvent is returned to the solvent flow.

公开(公告)号：DE10061555A1

公开(公告)日：2002-06-20

申请号：DE10061555

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

IPC: B01J23/72 ,  B01J23/76 ,  B01J23/80 ,  B01J23/89 ,  B01J37/02 ,  C07B61/00 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00

Abstract: The invention relates to a catalyst for the hydrogenation of C4 dicarboxylic acids and/or derivatives thereof, preferably maleic anhydride, in the gas phase, characterised in that said catalyst comprises 5 to 100 wt %, preferably 40 to 90 wt % copper oxide and 0 to 95 wt %, preferably 10 to 60 wt % of one or more metals, or compounds thereof, from the group comprising Al, Si, Zn, Pd, La, Ce, elements of groups III A to VIII A and of groups I A and II A as active mass and said mass is deposited on an inert support in the form of a thin layer.

公开(公告)号：DE10061558A1

公开(公告)日：2002-06-13

申请号：DE10061558

申请日：2000-12-11

Applicant: BASF AG

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

IPC: C07B61/00 ,  C07C51/36 ,  C07C55/10 ,  C07D307/08 ,  C07D307/33 ,  C07B41/00

Abstract: The invention relates to a method for the hydrogenation of C4-dicarboxylic acids or derivatives thereof in the gas phase. The method is carried out in a fluid bed reactor. Known catalytic compositions may be applied.

公开(公告)号：DE59900681D1

公开(公告)日：2002-02-21

申请号：DE59900681

申请日：1999-02-11

Applicant: BASF AG

Inventor： PINKOS ROLF ,  RAHN RALF-THOMAS

IPC: C07C29/149 ,  C07C29/17 ,  C07C31/20 ,  C07C51/573 ,  C07C57/145 ,  C07C67/08 ,  C07C69/60 ,  C07D307/08 ,  C07D307/33

Abstract: The invention relates to a process for the separation of maleic anhydride from the maleic anhydride-containing reactor offgases from the preparation of maleic anhydride by the oxidation of hydrocarbons, in which this gas stream is brought into contact with a high-boiling, inert absorbent for maleic anhydride and maleic anhydride is separated from the resultant liquid absorbate phase by vapor stripping, where the stripping agent used is an alcohol, and at least some of the maleic anhydride is reacted with the alcohol to give the ester.

公开(公告)号：DE19856592A1

公开(公告)日：2000-06-15

申请号：DE19856592

申请日：1998-12-08

Applicant: BASF AG

Inventor： RAHN RALF-THOMAS ,  RUST HARALD ,  RUEHL THOMAS ,  HENKELMANN JOCHEM ,  STUTZ SUSANNE

IPC: C07C29/16 ,  C07C29/80 ,  C07C29/82 ,  C07C33/025 ,  C07C33/042 ,  C07C33/048 ,  C07C29/42

Abstract: Distillative recovery of alpha -ethynyl-carbinols (I) from the liquid reaction mixture from the addition of acetylene to alpha , beta -unsaturated carbonyl compounds comprises continuous distillation, in which the feed is passed to the middle of the distillation column, most of the water is distilled off at the top as azeotrope with the solvent and (I) is recovered below the feed port.

公开(公告)号：DE19818340A1

公开(公告)日：1999-10-28

申请号：DE19818340

申请日：1998-04-23

Applicant: BASF AG

Inventor： FISCHER ROLF ,  KAIBEL GERD ,  PINKOS ROLD ,  RAHN RALF-THOMAS

IPC: C07B61/00 ,  C07C29/136 ,  C07C29/149 ,  C07C29/88 ,  C07C31/20 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00 ,  C07C29/147 ,  C07C51/16 ,  C07C29/74 ,  C07D307/60 ,  C07B41/00

Abstract: Production of butan-1,4-diol (I), tetrahydrofuran (THF) and psi -butyrolactone (GBL) involves: (i) oxidation of butane to a product stream containing maleic anhydride (II); (ii) absorption of (II) with a high-boiling alcohol (III), giving a liquid absorption discharge (IV) containing maleic half and diesters and (III); (iii) further esterification of (IV); and (iv) liquid phase hydrogenation of the esterification discharge (V). The novel features are that (III) is a polyol with a boiling point of over 233 deg C at normal pressure; and (V) has an acid number less than 30 mg KOH/g and water content less than 1 wt. %.

公开(公告)号：DE50113441D1

公开(公告)日：2008-02-14

申请号：DE50113441

申请日：2001-05-03

Applicant: BASF AG

Inventor： KAIBEL GERD ,  WECK ALEXANDER ,  RAHN RALF-THOMAS

IPC: C07D307/08 ,  B01D3/14 ,  B01D3/26 ,  C07C27/28 ,  C07C29/80 ,  C07C31/20 ,  C07D307/33

Abstract: In a process for the continuous fractional distillation of mixtures comprising tetrahydrofuran, gamma-butyrolactone and/or 1,4-butanediol to give at least three fractions, the fractionation is carried out in an assembly of distillation columns comprising at least one dividing wall column or at least one assembly of thermally coupled conventional distillation columns.

公开(公告)号：MY121071A

公开(公告)日：2005-12-30

申请号：MYPI9902169

申请日：1999-06-01

Applicant: BASF AG

Inventor： BRUNNER MELANIE ,  RAHN RALF-THOMAS ,  RHEUDE UDO ,  HENKELMANN JOCHEM

IPC: C07D307/02 ,  C07D307/33 ,  C07D307/32 ,  C07D315/00

Abstract: A PROCESS FOR PRODUCING BUTYROLACTONES OF THE GENERAL FORMULA I@ @ FORMULA (I) WHERE R1 AND R2 ARE EACH HYDROGEN, ALKYL, HYDROXYALKYL, SUBSTITUTED OR UNSUBSTITUTED ARYL OR SUBSTITUTED OR UNSUBSTITUTED TRIALKYLSILYL, BY REACTING ALKYNES OF THE GENERAL FORMULA II FORMULA (II) WHERE R1 AND R2 ARE EACH AS DEFINED ABOVE, WITH CARBON MONOXIDE AND WATER IN THE PRESENCE OF A RHODIUM CATALYST UNDER PRESSURES FROM 20 TO 300 BAR AND HYDROGENATING THE UNHYDROGENATED 2(5H) -FURANONE INTERMEDIATES COMPRISES a) REACTING THE CARBONYLATION REACTION MIXTURE WITH HYDROGEN AT FROM 150 TO 250°C AND FROM 100 TO 300 BAR, b) REMOVING THE PRECIPITATED CATALYST AND RETURNING IT INTO THE CARBONYLATION REACTION, AND c) SUBJECTING THE CATALYST-FREE REACTION MIXTURE TO A DISTILLATION TO RECOVER THE BUTYROLACTONE.

公开(公告)号：DE10337501A1

公开(公告)日：2005-04-14

申请号：DE10337501

申请日：2003-08-14

Applicant: BASF AG

Inventor： KUHRS CHRISTIAN ,  DANZ ECKEHARD ,  STEINER WOLFGANG ,  RAHN RALF-THOMAS ,  GRASLER THOMAS ,  GEIER REINER ,  HARTH KLAUS ,  HOELZLE MARKUS

IPC: C07D251/60

Abstract: Production of melamine by urea decomposition using a solid catalyst takes place in a main reactor containing a catalyst of low Lewis acidity and a post-reactor containing a catalyst of the same or higher (especially higher) Lewis acidity.

公开(公告)号：ES2172354T3

公开(公告)日：2002-09-16

申请号：ES99955265

申请日：1999-05-21

Applicant: BASF AG

Inventor： BRUNNER MELANIE ,  RAHN RALF-THOMAS ,  RHEUDE UDO ,  HENKELMANN JOCHEM

IPC: C07D307/33 ,  C07D307/32 ,  C07D315/00

Abstract: Process for producing butyrolactones of the general formula Iwhere R1 and R2 are each hydrogen, alkyl, hydroxyalkyl, substituted or unsubstituted aryl or substituted or unsubstituted trialkylsilyl, by reacting alkynes of the general formula IIwhere R1 and R2 are each as defined above, with carbon monoxide and water in the presence of a rhodium catalyst under pressures from 20 to 300 bar and hydrogenating the unhydrogenated 2(5H)-furanone intermediates comprisesa) reacting the carbonylation reaction mixture with hydrogen at from 150 to 250° C. and from 100 to 300 bar,b) removing the precipitated catalyst and returning it into the carbonylation reaction, andc) subjecting the catalyst-free reaction mixture to a distillation to recover the butyrolactone.