公开(公告)号：DE10219685A1

公开(公告)日：2003-11-13

申请号：DE10219685

申请日：2002-05-02

Applicant: BASF AG

Inventor： BERNDT SILKE ,  MUELLER-ENGEL KLAUS ,  SCHINDLER GOETZ-PETER ,  ROSOWSKI FRANK ,  PETZOLDT JOCHEN

IPC: C07C51/25 ,  C07C57/05

Abstract: Production of methacrylic acid from isobutane comprises partial dehydrogenation of isobutane, separation of isobutane and isobutene and catalyzed partial oxidation of isobutene with molecular oxygen in the gas phase to form a methacrolein containing product mixture. A process for the production of methacrylic acid from isobutane comprises: (A) partial, selective, heterogeneously catalyzed dehydrogenation of isobutane in the gas phase in a reaction zone (A) to form a mixture of isobutene and unreacted isobutane; (B) transport of the gas mixture to a reaction zone (B) followed by a selective heterogeneously catalyzed partial oxidation with molecular oxygen in the gas phase to form a methacrolein containing product mixture whereby the molar conversion of isobutene is at least 95 mol.% (C) the methacrolein containing product mixture from (B) is transferred to a reaction zone (C), without separation of the components, to undergo a selective heterogeneously catalyzed partial oxidation with molecular oxygen in the gas phase to form a methacrylic acid containing product mixture and is characterized in that components in the reaction mixture from (A) other than isobutane and isobutene are separated off to at least 80 mol.% and that the molar ratio of molecular oxygen to molecular nitrogen in reaction zone (B) is 1:1-1:10.

公开(公告)号：AU2003208789A1

公开(公告)日：2003-09-09

申请号：AU2003208789

申请日：2003-02-04

Applicant: BASF AG

Inventor： ROSOWSKI FRANK ,  BAIER MICHAEL ,  TENTEN ANDREAS ,  WOLF HANS-JOSEF ,  STORCK SEBASTIAN

IPC: C07D307/89 ,  B01J23/22 ,  B01J35/00 ,  C07B61/00 ,  C07C51/265 ,  C07C51/31 ,  C07C63/16

Abstract: Production of phthalic anhydride by gas-phase oxidation of o-xylene or naphthalene in a tubular reactor involves using three or more different catalyst beds with controlled hot-spot temperatures. A method for the production of phthalic anhydride (I) by gas-phase oxidation of xylene and/or naphthalene in a thermostatted tube-bank reactor on 3 or more solid-bed catalysts in 3 different layers involves carrying out the process in such a way that the peak temperature (T2) in the second catalyst layer (in the direction of flow) is up to 50 degrees C below the peak temperature (T1) in the first layer and the peak temperature (T3) in the third layer is 30-100 degrees C below T1.

公开(公告)号：DE10127374A1

公开(公告)日：2002-12-12

申请号：DE10127374

申请日：2001-06-06

Applicant: BASF AG

Inventor： OLBERT GERHARD ,  MATTKE TORSTEN ,  KUMMER MATTHIAS ,  RUEHL THOMAS ,  ROSOWSKI FRANK

IPC: B01J8/02 ,  B01J8/04 ,  B01J8/06 ,  C40B30/08 ,  C40B40/18 ,  F28D7/00 ,  G01N31/10 ,  G01N25/22

Abstract: Reactor (1) comprises several contact tubes (2) in parallel in the reactor inner chamber and welded to the reactor base. Caps are on both reactor ends to form a cap chamber. A fluid reaction medium is introduced into the tubes via one cap chamber, flows through the contact tubes and flows out through the other cap chamber. The contact tubes are in two or more contact tube regions (7) thermally separated from each other. An Independent claim is also included for a process for testing catalyst systems. Preferred Features: At least one contact tube with a sleeve (9) for receiving a thermocouple and filled with Al2O3 is in one or more contact regions and closed at both ends. A cover is provided for the contact tubes of one or more contact regions.

公开(公告)号：CA2448082A1

公开(公告)日：2002-12-12

申请号：CA2448082

申请日：2002-06-05

Applicant: BASF AG

Inventor： OLBERT GERHARD ,  KUMMER MATTHIAS ,  RUEHL THOMAS ,  MATTKE TORSTEN ,  ROSOWSKI FRANK

IPC: F04D7/06 ,  F04D3/00 ,  F04D13/00 ,  F04D29/40 ,  F04D29/52

Abstract: The invention relates to a pump (1) comprising a pump feed tube (13) for transporting a heat exchange medium (6) for a reactor containing a bundle of catalyst tubes (2). The pump (1) has a housing (14) that surrounds the pump feed tube (13) and comprises an opening (15) in the lower part of the housin g (14), which allows the heat exchange medium (6) that is drawn from the lower section of the reactor by the pump (1) to flow into the housing (14). The medium flows upwards in the section lying between the internal wall of the housing (14) and the external wall of the pump feed tube (13), optionally ov er a heat exchanger (18) and into the interior of the pump feed tube (13) via a n opening (16) in the upper section of said pump feed tube (13). The medium th en flows through the pump feed tube from top to bottom, into the reactor via an opening (17) in the lower section of said tube (13) and into the upper secti on of the intermediate chamber between the catalyst tubes (2).