公开(公告)号：DE19946671A1

公开(公告)日：2001-04-05

申请号：DE19946671

申请日：1999-09-29

Applicant: BASF AG

Inventor： SETZER UDO ,  OTTO BERNHARD ,  BECHTEL SIEGFRIED ,  GELDER RICHARD VAN ,  FETZER THOMAS ,  BORGWART JOACHIM ,  RAULS MATTHIAS ,  GAHN CHRISTOPH

IPC: B01D9/00 ,  B01J19/00 ,  B01J19/10 ,  C07C51/43 ,  C07B63/00

Abstract: A method for preventing crusting in reactors or crystallisers for solutions and suspensions involves exposure to ultrasound vibrations which are fed in from sonotrodes at about the level of the liquid or suspension in the vessel. A method for preventing the formation of a crust in reactors or crystallisers (e.g. production crystallisers) (13) for solutions and suspensions (11) by exposure to ultrasound vibrations from a high-frequency generator (1), which are fed into the system at input points (4) on the walls (6, 21) or base (7) of the container (13) via sonotrodes (3) connected to electromechanical transformers (2). The method involves feeding in the vibrations in a zone (16) around the level (17) of the liquid or suspension in the container. An Independent claim is also included for an arrangement for preventing crusting as above, in which sonotrodes are fitted in a ring around the crystallizer in a zone (16) between the level (17) of the suspension in the vessel (13) and the zone affected by a cooling medium (9).

公开(公告)号：IN182765B

公开(公告)日：1999-07-17

申请号：IN29MA1994

申请日：1994-01-19

Applicant: BASF AG

Inventor： FETZER THOMAS ,  BUECHELE WOLFGANG ,  IRGANG MATTHIAS ,  OTTO BERNHARD ,  WISTUBA HERMANN ,  BUERGER GERT

IPC: B01J21/00

公开(公告)号：IN182227B

公开(公告)日：1999-02-06

申请号：IN476MA1993

申请日：1993-07-13

Applicant: BASF AG

Inventor： FETZER THOMAS ,  BUECHELE WOLFGANG ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  BUERGER GERT ,  HERRMANN GUENTER

IPC: B01J21/00

公开(公告)号：PL325600A1

公开(公告)日：1998-08-03

申请号：PL32560096

申请日：1996-09-10

Applicant: BASF AG

Inventor： FETZER THOMAS ,  WAGNER ECKHART ,  ROETH EMIL ,  RUPPEL WILHELM ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  SCHUMACHER VOLKER ,  BUERGER GERT

IPC: B01D53/56 ,  B01D53/77 ,  B01D53/86 ,  C01B21/38 ,  C01B21/40

Abstract: PCT No. PCT/EP96/03971 Sec. 371 Date Mar. 10, 1998 Sec. 102(e) Date Mar. 10, 1998 PCT Filed Sep. 10, 1996 PCT Pub. No. WO97/10042 PCT Pub. Date Mar. 20, 1997The invention relates to a process for removing nitrogen oxides from a gas stream containing same, which comprises passing the gas stream (A) through a stage for absorbing the nitrogen oxides other than N2O in an absorbent or reacting the nitrogen oxides other than N2O with an absorbent at a pressure of from 1,5 to 20 bar, and (B) through a stage for reducing the amount of N2O, preferably employing the pressure level of step A, and to apparatus therefor and the use thereof.

公开(公告)号：SG49196A1

公开(公告)日：1998-05-18

申请号：SG1996007495

申请日：1993-07-17

Applicant: BASF AG

Inventor： OTTO BERNHARD ,  BUERGER GERT ,  HERRMANN GUENTER ,  WISTUBA HERMANN ,  FETZER THOMAS ,  BUECHELE WOLFGANG

IPC: B01D53/94 ,  B01D53/56 ,  B01D53/86 ,  B01J23/89 ,  C01B13/02 ,  C07C51/27 ,  C07C51/487

Abstract: The invention concerns an aluminium oxide catalyst containing silver, the catalyst containing in addition copper oxide and, optionally, other promoters and active components. This catalyst is used to decompose pure nitrous oxide (N2O) or nitrous oxide in gas mixtures at elevated temperatures, and exhibits high activity.

公开(公告)号：SG48259A1

公开(公告)日：1998-04-17

申请号：SG1996008506

申请日：1994-01-13

Applicant: BASF AG

Inventor： OTTO BERNHARD ,  BUERGER GERT ,  WISTUBA HERMANN ,  PIJL PAUL ,  FETZER THOMAS ,  BUECHELF WOLFGANG

IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  B01J21/04 ,  B01J23/00 ,  B01J23/72 ,  B01J23/76 ,  B01J23/78 ,  B01J23/80 ,  B01J35/10 ,  C07C51/487

Abstract: PCT No. PCT/EP94/00081 Sec. 371 Date Mar. 24, 1995 Sec. 102(e) Date Mar. 24, 1995 PCT Filed Jan. 13, 1994 PCT Pub. No. WO94/16798 PCT Pub. Date Aug. 4, 1994A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200 DEG -900 DEG C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl2O3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300 DEG -1300 DEG C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.

公开(公告)号：DK0680374T3

公开(公告)日：1997-06-02

申请号：DK94905047

申请日：1994-01-13

Applicant: BASF AG

Inventor： BUECHELE WOLFGANG ,  FETZER THOMAS ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  BUERGER GERT ,  PIJL PAUL

IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  B01J21/04 ,  B01J23/00 ,  B01J23/72 ,  B01J23/76 ,  B01J23/78 ,  B01J23/80 ,  B01J35/10 ,  C07C51/487 ,  B01D53/36

Abstract: PCT No. PCT/EP94/00081 Sec. 371 Date Mar. 24, 1995 Sec. 102(e) Date Mar. 24, 1995 PCT Filed Jan. 13, 1994 PCT Pub. No. WO94/16798 PCT Pub. Date Aug. 4, 1994A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200 DEG -900 DEG C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl2O3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300 DEG -1300 DEG C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.

公开(公告)号：ES2100049T3

公开(公告)日：1997-06-01

申请号：ES94905047

申请日：1994-01-13

Applicant: BASF AG

Inventor： FETZER THOMAS ,  BUECHELE WOLFGANG ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  BUERGER GERT ,  PIJL PAUL

IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  B01J21/04 ,  B01J23/00 ,  B01J23/72 ,  B01J23/76 ,  B01J23/78 ,  B01J23/80 ,  B01J35/10 ,  C07C51/487

Abstract: PCT No. PCT/EP94/00081 Sec. 371 Date Mar. 24, 1995 Sec. 102(e) Date Mar. 24, 1995 PCT Filed Jan. 13, 1994 PCT Pub. No. WO94/16798 PCT Pub. Date Aug. 4, 1994A process for the catalytic decomposition of dinitrogen monoxide in a gas stream by contacting the gas stream at temperatures of 200 DEG -900 DEG C. and pressures of 0.1 to 20 bar with a catalyst free of noble metals, the catalyst being prepared by combining a spinel CuAl2O3 with another spinel-forming metal component selected from the group consisting of tin, lead, zinc, magnesium, calcium, strontium and barium or mixtures thereof in elemental form or as an oxide or salt, and calcining at temperatures of 300 DEG -1300 DEG C. and under pressures of 0.1-200 bar in order to at least partially liberate the copper from the spinel by replacement with the other metal component.

公开(公告)号：NO952887A

公开(公告)日：1995-07-20

申请号：NO952887

申请日：1995-07-20

Applicant: BASF AG

Inventor： FETZNER THOMAS ,  BUECHELE WOLFGANG ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  BUERGER GERT ,  PIJL PAUL

IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  B01J21/04 ,  B01J23/00 ,  B01J23/72 ,  B01J23/76 ,  B01J23/78 ,  B01J23/80 ,  B01J35/10 ,  C07C51/487

CPC classification number: B01J23/76 ,  B01D53/8628 ,  B01J23/005 ,  B01J23/72 ,  C07C51/487 ,  Y02C20/10 ,  Y02P20/328 ,  Y02P20/51 ,  C07C55/14

公开(公告)号：CA2152816A1

公开(公告)日：1994-08-04

申请号：CA2152816

申请日：1994-01-13

Applicant: BASF AG

Inventor： FETZER THOMAS ,  BUECHELE WOLFGANG ,  WISTUBA HERMANN ,  OTTO BERNHARD ,  BUERGER GERT ,  PIJL PAUL

IPC: B01D53/56 ,  B01D53/86 ,  B01D53/94 ,  B01J21/04 ,  B01J23/00 ,  B01J23/72 ,  B01J23/76 ,  B01J23/78 ,  B01J23/80 ,  B01J35/10 ,  C07C51/487 ,  C01B21/02

Abstract: A process is disclosed for catalytically decomposing nitrous oxide pure or contained in gaseous mixtures at 200 to 900 .degree.C by using a catalyst prepared by combining CuAl2O4 with tin, lead, an element of the main or secondary group II of the periodic table of elements as an oxide or a salt or in the elementary form, and calcination at 300 to 1300 .degree.C and at a pressure from 0.1 to 200 bars.