公开(公告)号：ES2218265T3

公开(公告)日：2004-11-16

申请号：ES00985245

申请日：2000-12-22

Applicant: BASF AG

Inventor： BLOCK ULRICH ,  SEUBERT ROLF ,  ULRICH BERNHARD ,  WUNSCHMANN HELMUT

IPC: B01F23/10 ,  B01F3/04 ,  B01F5/04

Abstract: A process and an apparatus for producing a homogeneous mixture of a gaseous aromatic hydrocarbon and an oxygen-containing gas for catalytic gas-phase reactions, in particular a homogeneous mixture of gaseous o-xylene and/or naphthalene and air for preparing phthalic anhydride, are provided. The liquid aromatic hydrocarbon is atomized to form droplets having a diameter of less than 1 mm and injected into an oxygen-containing gas stream (12) preheated to above the boiling point of the aromatic hydrocarbon. According to the invention, the liquid aromatic hydrocarbon is atomized by means of nozzles (15) which form a hollow cone (16), preferably by means of swirl nozzles. The o-xylene/air mixture is advantageously produced in a chamber which is bounded by side walls (18) heated to above the boiling point of the hydrocarbon.

公开(公告)号：DE10040818A1

公开(公告)日：2002-03-07

申请号：DE10040818

申请日：2000-08-21

Applicant: BASF AG

Inventor： REUTER PETER ,  ULRICH BERNHARD ,  HEIDEMANN THOMAS

IPC: C07B61/00 ,  C07C51/265 ,  C07C63/06 ,  C07D307/89 ,  C07B41/08 ,  C07C63/16 ,  B01J8/06

Abstract: The invention relates to a method for the catalytic vapour-phase partial oxidation of aromatic hydrocarbons to form carboxylic acids or carboxylic acid anhydrides at an increased temperature. According to said method, a vapour stream charged with the educt is guided through a multi-tube flow reactor, said reactor being maintained at the correct temperature by means of one or more separate thermostatic baths, which have a counter-current circulation in relation to the educt vapour stream. The difference between the temperature of the thermostatic bath in the vicinity of the reactor outlet and the temperature of the product vapour stream that leaves the reactor is used to control the selectivity of the vapour-phase oxidation.

公开(公告)号：DE19910077A1

公开(公告)日：1999-08-19

申请号：DE19910077

申请日：1999-03-08

Applicant: BASF AG

Inventor： REUTER PETER ,  VOIT GUIDO ,  ULRICH BERNHARD ,  HEIDEMANN THOMAS

IPC: C07C51/265 ,  C07D307/60 ,  C07D307/89

Abstract: In the production of carboxylic anhydrides or acids by catalytic gas phase oxidation of aromatic hydrocarbons with a gas containing oxygen (O2) in a tubular reactor filled with oxidation catalyst, the catalyst is kept under an inert gas during the non-production phase.

公开(公告)号：AT302178T

公开(公告)日：2005-09-15

申请号：AT00958412

申请日：2000-08-10

Applicant: BASF AG

Inventor： PESCHEL WERNER ,  BESSLING BERND ,  REUTER PETER ,  LORZ PETER MICHAEL ,  ULRICH BERNHARD ,  KNAB JEAN WERNER ,  KUMMER MATTHIAS ,  RUEHL THOMAS

IPC: B01D3/00 ,  B01D3/10 ,  B01D3/14 ,  C07C51/573 ,  C07C63/16 ,  C07D307/89

Abstract: On-spec phthalic anhydride is prepared by distillative purification of crude phthalic anhydride by a process in which crude phthalic anhydride is fed to a distillation column which is operated at reduced pressure, the low boilers are removed at the top or in the vicinity of the top of the distillation column and the on-spec phthalic anhydride is removed from the column via a side take-off.

公开(公告)号：AU2172001A

公开(公告)日：2001-07-09

申请号：AU2172001

申请日：2000-12-22

Applicant: BASF AG

Inventor： BLOCK ULRICH ,  SEUBERT ROLF ,  ULRICH BERNHARD ,  WUNSCHMANN HELMUT

IPC: B01F23/10 ,  B01F3/04 ,  B01F5/04

Abstract: A process and an apparatus for producing a homogeneous mixture of a gaseous aromatic hydrocarbon and an oxygen-containing gas for catalytic gas-phase reactions, in particular a homogeneous mixture of gaseous o-xylene and/or naphthalene and air for preparing phthalic anhydride, are provided. The liquid aromatic hydrocarbon is atomized to form droplets having a diameter of less than 1 mm and injected into an oxygen-containing gas stream (12) preheated to above the boiling point of the aromatic hydrocarbon. According to the invention, the liquid aromatic hydrocarbon is atomized by means of nozzles (15) which form a hollow cone (16), preferably by means of swirl nozzles. The o-xylene/air mixture is advantageously produced in a chamber which is bounded by side walls (18) heated to above the boiling point of the hydrocarbon.

公开(公告)号：DE19962616A1

公开(公告)日：2001-06-28

申请号：DE19962616

申请日：1999-12-23

Applicant: BASF AG

Inventor： BLOCK ULRICH ,  SEUBERT ROLF ,  ULRICH BERNHARD ,  WUNSCHMANN HELMUT

IPC: C07B61/00 ,  C07D307/89 ,  B01F5/02

Abstract: Production of a homogeneous mixture of an aromatic hydrocarbon vapor and an oxygen containing gas for catalytic gas phase reactions, comprises spraying droplets of the liquid aromatic hydrocarbon having a diameter of less than 1 mm, into the oxygen containing gas stream, heated to above the b.pt. of the hydrocarbon, by means of nozzles, preferably rifled nozzles to form a hollow cone. An Independent claim is included for a device for the production of the vapor mixture (I) having gas channels (11) for the pre-heated oxygen containing gas stream (12); a spray device (13) opening into one channel (11) for a liquid aromatic hydrocarbon stream whereby the spray device (13) has rifled nozzles (15) and the gas channels (11) have walls (18) that extend at least away from the nozzles (15) and are heated to at least the b.pt. of the hydrocarbon.

公开(公告)号：MY120022A

公开(公告)日：2005-08-30

申请号：MYPI9800882

申请日：1998-02-27

Applicant: BASF AG

Inventor： ULRICH BERNHARD ,  HEFELE GERHARD ,  KRATZER OTTO ,  SCHEIDMEIR WALTER

IPC: B01J23/04 ,  B01J23/22 ,  B01J37/02 ,  C07C51/255 ,  C07C51/265 ,  C07C51/31 ,  C07D307/89

Abstract: IN A PROCESS FOR PREPARING PHTHALIC ANHYDRIDE BY CATALYTIC GAS-PHASE OXIDATION OF O-XYLENE OR NAPHTHALENE OR O-XYLENE/NAPHTHALENE MIXTURES WITH A GAS COMPRISING MOLECULAR OXYGEN OVER A COATED CATALYST COMPRISING AN INERT, NONPOROUS SUPPORT MATERIAL ON WHICH A CATALYTICALLY ACTIVE COMPOSITION COMPRISING TITANIUM DIOXIDE AND VANADIUM PENTOXIDE IS APPLIED IN LAYER FROM, A CATALYST WHOSE CATALYTICALLY ACTIVE COMPOSITION COMPRISES FROM 3 TO 6% BY WEIGHT OF VANADIUM PENTOXIDE, CALCULATED AS V2O3, FROM 0.3 TO 0.5% BY WEIGHT OF A CESIUM COMPOUND, CALCULATED AS CS, AND THE REMAINDER TO 100% BY WEIGHT OF TITANIUM DIOXIDE IN THE ANATASE MODIFICATION IS USED IN THE PRESENCE OR ABSENCE OF A COATED CATALYST, DIFFERING THEREFROM , FOR THE CATALYTIC GAS-PHASE OXIDATION OF O-XYLENE OR NAPHTHALENE OR O-XYLENE/NAPHTHALENE MIXTURES AND, IN THE PRESENCE OF SUCH A SECOND CATALYST, THE LATTER IS USED IN A COMBINED BED WITH THE CATALYST OF THE ABOVE COMPOSITION IN THE REACTOR.

公开(公告)号：AT262372T

公开(公告)日：2004-04-15

申请号：AT00985245

申请日：2000-12-22

Applicant: BASF AG

Inventor： BLOCK ULRICH ,  SEUBERT ROLF ,  ULRICH BERNHARD ,  WUNSCHMANN HELMUT

IPC: B01F23/10 ,  B01F3/04 ,  B01F5/04

Abstract: A process and an apparatus for producing a homogeneous mixture of a gaseous aromatic hydrocarbon and an oxygen-containing gas for catalytic gas-phase reactions, in particular a homogeneous mixture of gaseous o-xylene and/or naphthalene and air for preparing phthalic anhydride, are provided. The liquid aromatic hydrocarbon is atomized to form droplets having a diameter of less than 1 mm and injected into an oxygen-containing gas stream (12) preheated to above the boiling point of the aromatic hydrocarbon. According to the invention, the liquid aromatic hydrocarbon is atomized by means of nozzles (15) which form a hollow cone (16), preferably by means of swirl nozzles. The o-xylene/air mixture is advantageously produced in a chamber which is bounded by side walls (18) heated to above the boiling point of the hydrocarbon.

公开(公告)号：ES2198051T3

公开(公告)日：2004-01-16

申请号：ES98912298

申请日：1998-02-12

Applicant: BASF AG

Inventor： HEFELE GERHARD ,  KRATZER OTTO ,  SCHEIDMEIR WALTER ,  ULRICH BERNHARD

IPC: B01J23/04 ,  B01J23/22 ,  B01J37/02 ,  C07C51/255 ,  C07C51/265 ,  C07C51/31 ,  C07D307/89

Abstract: In a process for preparing phthalic anhydride by catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures with a gas comprising molecular oxygen over a coated catalyst comprising an inert, nonporous support material on which a catalytically active composition comprising titanium dioxide and vanadium pentoxide is applied in layer form, a catalyst whose catalytically active composition comprises from 3 to 6% by weight of vanadium pentoxide, calculated as V2O5, from 0.3 to 0.5% by weight of a cesium compound, calculated as Cs, and the remainder to 100% by weight of titanium dioxide in the anatase modification is used in the presence or absence of a coated catalyst, differing therefrom, for the catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures and, in the presence of such a second catalyst, the latter is used in a combined bed with the catalyst of the above composition in the reactor.

公开(公告)号：DE59808067D1

公开(公告)日：2003-05-28

申请号：DE59808067

申请日：1998-02-12

Applicant: BASF AG

Inventor： HEFELE GERHARD ,  KRATZER OTTO ,  SCHEIDMEIR WALTER ,  ULRICH BERNHARD

IPC: B01J23/04 ,  B01J23/22 ,  B01J37/02 ,  C07C51/255 ,  C07C51/265 ,  C07C51/31 ,  C07D307/89

Abstract: In a process for preparing phthalic anhydride by catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures with a gas comprising molecular oxygen over a coated catalyst comprising an inert, nonporous support material on which a catalytically active composition comprising titanium dioxide and vanadium pentoxide is applied in layer form, a catalyst whose catalytically active composition comprises from 3 to 6% by weight of vanadium pentoxide, calculated as V2O5, from 0.3 to 0.5% by weight of a cesium compound, calculated as Cs, and the remainder to 100% by weight of titanium dioxide in the anatase modification is used in the presence or absence of a coated catalyst, differing therefrom, for the catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures and, in the presence of such a second catalyst, the latter is used in a combined bed with the catalyst of the above composition in the reactor.