公开(公告)号：DE50101522D1

公开(公告)日：2004-03-25

申请号：DE50101522

申请日：2001-08-16

Applicant: BASF AG

Inventor： ISAK HEINZ ,  SENDHOFF NORBERT ,  SCHUETZ FRANZ ,  THERRE JOERG ,  DROEGEMUELLER MICHAEL ,  FRANKE DIRK ,  MUNZINGER MANFRED ,  WECK ALEXANDER ,  BURKART KIRSTEN

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

公开(公告)号：ZA200302068B

公开(公告)日：2004-03-15

申请号：ZA200302068

申请日：2003-03-14

Applicant: BASF AG

Inventor： BURKART KIRSTEN ,  DROEGEMUELLER MICHAEL ,  FRANKE DIRK ,  ISAK HEINZ ,  MUNZINGER MANFRED ,  SCHUETZ FRANZ ,  SENDHOFF NORBERT ,  THERRE JOERG ,  WECK ALEXANDER

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34 ,  C07D ,  A01N

Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

公开(公告)号：DE10225927A1

公开(公告)日：2003-12-24

申请号：DE10225927

申请日：2002-06-11

Applicant: BASF AG

Inventor： HESSE MICHAEL ,  SCHLITTER STEPHAN ,  BORCHERT HOLGER ,  SCHUBERT MARKUS ,  ROESCH MARKUS ,  BOTTKE NILS ,  FISCHER ROLF-HARTMUTH ,  WECK ALEXANDER ,  WINDECKER GUNTHER ,  HEYDRICH GUNNAR

IPC: B01J23/80 ,  C07B61/00 ,  C07C29/149 ,  C07C31/20 ,  C07C29/132 ,  C07D307/20 ,  C07D307/32

Abstract: The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C 4 -dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C 4 -dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it to a product which contains mainly optionally alkyl-substituted gamma-butyrolactone; b) converting the product stream into the liquid phase; c) introducing the product stream obtained in this way into a second reactor at a temperature of from 100° C. to 240° C. and a pressure of from 20 to 250 bar and catalytically hydrogenating it in the liquid phase to optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from by-products and any unconverted reactants; e) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages both using a catalyst which comprises =5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of a support, said second reactor having a higher pressure than said first reactor, and the product mixture removed from said first reactor being introduced without further purification into said second reactor.

公开(公告)号：HU0300766A2

公开(公告)日：2003-09-29

申请号：HU0300766

申请日：2001-08-16

Applicant: BASF AG

Inventor： BURKART KIRSTEN ,  DROEGEMUELLER MICHAEL ,  FRANKE DIRK ,  ISAK HEINZ ,  MUNZINGER MANFRED ,  SCHUETZ FRANZ ,  SENDHOFF NORBERT ,  THERRE JOERG ,  WECK ALEXANDER

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

公开(公告)号：SK1922003A3

公开(公告)日：2003-08-05

申请号：SK1922003

申请日：2001-08-16

Applicant: BASF AG

Inventor： ISAK HEINZ ,  SENDHOFF NORBERT ,  SCHUTZ FRANZ ,  THERRE JORG ,  DROGEMULLER MICHAEL ,  FRANKE DIRK ,  MUNZINGER MANFRED ,  WECK ALEXANDER ,  BURKART KIRSTEN

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.

公开(公告)号：DE10161458A1

公开(公告)日：2003-02-20

申请号：DE10161458

申请日：2001-12-13

Applicant: BASF AG

Inventor： WECK ALEXANDER ,  IFFLAND GABRIELE ,  SCHROEDER JUERGEN ,  MARTAN HANS ,  HENNIG GUNNAR ,  BESLING BERND

IPC: B01J8/02 ,  B01J10/00 ,  B01J10/02 ,  C07C67/08 ,  C07B41/12 ,  C07C57/04 ,  C07C67/02

Abstract: Production of esters by catalyzed reaction of carboxylic acid (or ester) with alcohol in reaction column(s) comprises: (i) feeding acid (or ester) and alcohol into the column spatially separate from each other depending on their boiling points; (ii) formation of an ester by countercurrent reaction at specific temperature and pressure; and (iii) removal of water of reaction from the column as vapor.

公开(公告)号：CA2418972A1

公开(公告)日：2003-02-11

申请号：CA2418972

申请日：2001-08-16

Applicant: BASF AG

Inventor： BURKART KIRSTEN ,  WECK ALEXANDER ,  ISAK HEINZ ,  SENDHOFF NORBERT ,  FRANKE DIRK ,  MUNZINGER MANFRED ,  THERRE JORG ,  DROGEMULLER MICHAEL ,  SCHUTZ FRANZ

IPC: A01N25/12 ,  A01N43/88 ,  C07D285/34

Abstract: A method for the production of a particle-containing preparation of tetrahyd ro- 3,5-dimethyl-1,3,5-thiadiazin-2-thione, by combination of a first aqueous solution containing methylammonium-N-methyldithiocarbamate with a second solution containing formaldehyde and separation and drying of the solid form ed is disclosed. The invention is characterised in that the first and second solutions are combined such that over the duration of the reaction the ratio of the concentration of dithiocarbamate functions and formaldehyde in the reaction mixture remains essentially constant over time.

公开(公告)号：DE10133054A1

公开(公告)日：2003-01-16

申请号：DE10133054

申请日：2001-07-07

Applicant: BASF AG

Inventor： SCHLITTER STEPHAN ,  BORCHERT HOLGER ,  HESSE MICHAEL ,  SCHUBERT MARKUS ,  BOTTKE NILS ,  FISCHER ROLF-HARTMUTH ,  ROESCH MARKUS ,  HEYDRICH GUNNAR ,  WECK ALEXANDER

IPC: B01J23/89 ,  B01J37/02 ,  B01J37/03 ,  C07D307/08 ,  C07D307/33 ,  C07D315/00

Abstract: A catalyst (I) for the gas phase hydrogenation of 4C-dicarboxylic acids and/or derivatives, preferably maleic acid anhydride, comprises copper oxide (20-94 wt.%), palladium and/or a palladium compound (0.005-5 wt.%) and an oxide support (2-79.995 wt.%) comprising oxides of Al, Si, Zn, La, Ce, Group IIIa-VIIIa elements and/or Group IA and II elements. Independent claims are also included for: (i) a process for the production of the catalyst (I) by impregnation of an oxide supported copper oxide catalyst with a solution of a soluble palladium compound, drying and optionally calcining; and (ii) a process for the gas phase hydrogenation of 4C-dicarboxylic acids and/or derivatives, preferably maleic acid anhydride in the presence of the catalyst (I).

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.