公开(公告)号：AU2004308652A1

公开(公告)日：2005-07-14

申请号：AU2004308652

申请日：2004-12-23

Applicant: BASF AG

Inventor： JOHANN THORSTEN ,  HARTH KLAUS ,  OLBERT GERHARD ,  WEBER MARKUS ,  FIENE MARTIN ,  STROFER ECKHARD ,  SIEGERT MARKUS ,  LANG NEVEN

IPC: B01J8/02 ,  B01J8/04 ,  B01J19/24 ,  C07C45/38 ,  F28D9/00

Abstract: A process for preparing formaldehyde by gas-phase oxidation of methanol vapor by means of a gas stream comprising molecular oxygen in the presence of a fixed-bed catalyst comprising iron and molybdenum, wherein the process is carried out in a reactor ( 1 ) having heat-exchange plates ( 2 ) which are arranged in the longitudinal direction of the reactor ( 1 ) and have a spacing between them and through which a heat transfer medium flows, inlet and outlet facilities ( 3, 4 ) for the heat transfer medium to the heat-exchange plates ( 2 ) and also gaps ( 5 ) between heat-exchange plates ( 2 ) in which the fixed-bed catalyst is present and into which the methanol vapor and the gas stream comprising molecular oxygen are passed, is described.

公开(公告)号：AU2003285303A8

公开(公告)日：2004-05-13

申请号：AU2003285303

申请日：2003-10-27

Applicant: BASF AG

Inventor： WALSDORFF CHRISTIAN ,  HARTH KLAUS ,  KUHRS CHRISTIAN ,  FIENE MARTIN ,  STROFER ECKHARD

IPC: C01B7/04 ,  C01B7/07 ,  C07C263/10

Abstract: Process for preparing chlorine from hydrochloric acid, which comprises the steps: a) providing a hydrochloric acid feed stream I; b) providing a hydrochloric acid recycle stream II; c) separating off a hydrogen chloride stream IV from the hydrochloric acid feed stream I and the hydrochloric acid recycle stream II in a distillation step; d) feeding the hydrogen chloride stream IV, an oxygen-containing steam V and, if desired, an oxygen-containing recycle stream Va into an oxidation zone and oxidizing hydrogen chloride to chlorine in the presence of a catalyst to give a product gas stream VI comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor; e) separating off hydrogen chloride and water from the product gas stream VI in an absorption step to give a gas stream VII and the hydrochloric acid recycle stream II; f) if desired, drying the gas stream VII; g) separating off an oxygen-containing stream from the gas stream VII and, if desired, recirculating at least part of this as oxygen-containing recycle stream Va to the oxidation zone, leaving a chlorine-containing product stream VIII; h) if desired, further purifying the chlorine-containing product stream VIII.

公开(公告)号：ES2198894T3

公开(公告)日：2004-02-01

申请号：ES99906202

申请日：1999-01-26

Applicant: BASF AG

Inventor： STROFER ECKHARD ,  JACOBS JAN ,  SEYFERT WILFRIED ,  SCHWARZ HANS VOLKMAR ,  SCHWEERS OLAF ,  SCHARR VOLKER

IPC: C07B61/00 ,  C07C209/78 ,  C07C211/45 ,  C07C211/50 ,  C07C263/10 ,  C07C265/14

Abstract: The production of methylene-di-phenylamine from aniline (A) and formaldehyde (F) with an acid catalyst (C) comprises placing (A) and possibly (C) in a reactor, feeding (F) and possibly (C) through a mixer into a circulation loop containing (A), possibly (C) and possibly (F), and heating to above 75 degrees C after adding at least 50% of the total (F). Independent claims are also included for: (a) mixtures containing methylene-di-phenylamine (MDA) obtained by this process; (b) a process for the production of polyisocyanates by phosgenation of these mixtures; (c) a process for the production of methylene-diphenylisocyanate (MDI) by phosgenation of MDA (obtained as above) at 50-150 degrees C and 0.5-10 bar, optionally in presence of inert solvent; (d) a process for the production of MDI comprising: (1) the semi-continuous process described above using a mol ratio of (A):(C) = (1:0.6)-(1:0.01) and a mol ratio of (A):(total F) = (1.7:1)-(7.2:1), in which the temperature of the circulating mixture is 20-75 degrees C and the mixture is heated for at least 0.2 hour at above 75 degrees C after adding at least 50% of the (F), (2) neutralization, (3) distillation of water and aniline, (4) phosgenation of the purified MDA as in (c) above, (5) removal of phosgene, hydrogen chloride and possibly solvent at below 150 degrees C under vacuum or inert gas, (6) removal of solvent at not above 1900 degrees C and (7) isolation of 2,2'-, 2,4'- and/or 4,4'-MDI and/or mixtures of at least two of these isomers by distillation at 2-50 mbar and 150-250 degrees C and/or by crystallization; and (e) polyisocyanates obtained by these processes.

公开(公告)号：AU2003242546A1

公开(公告)日：2003-12-12

申请号：AU2003242546

申请日：2003-05-19

Applicant: BASF AG

Inventor： WOLFERT ANDREAS ,  MULLER CHRISTIAN ,  STROFER ECKHARD ,  BRODHAGEN ANDREAS

IPC: C07C263/10 ,  C07C265/14

Abstract: The present invention relates to a continuous process for preparing isocyanates by reacting primary amines with phosgene, wherein the reaction is carried out in a cascade of at least two tube reactors and the gas phase formed in the reaction is separated off in a phase separator after each reactor and only the liquid phase is passed to the next reactor or to product purification and the reaction volume of the first tube reactor is only a fraction of the total reaction volume.

公开(公告)号：AU2003232761A1

公开(公告)日：2003-12-02

申请号：AU2003232761

申请日：2003-05-13

Applicant: BASF AG

Inventor： FIENE MARTIN ,  WEBER MARKUS ,  STROFER ECKHARD ,  HARTH KLAUS ,  WALSDORFF CHRISTIAN

IPC: C01B7/01 ,  C01B7/04

Abstract: The present invention relates to a process for the continuous preparation of chlorine by reaction of hydrogen chloride with oxygen in the presence of a heterogeneous catalyst, in which the conversion of hydrogen chloride in a single pass through the reactor is restricted to from 15 to 90%.

公开(公告)号：AU2002360937A1

公开(公告)日：2003-06-10

申请号：AU2002360937

申请日：2002-11-19

Applicant: BASF AG

Inventor： STROFER ECKHARD ,  PFEFFINGER JOACHIM ,  WEBER MARKUS ,  KNOSCHE CARSTEN ,  WOLFERT ANDREAS ,  MULLER CHRISTIAN

IPC: C07C263/10 ,  B01J12/00 ,  C07C265/14

Abstract: The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal dimensions of which have a width/height ratio of at least 2/1.

公开(公告)号：AU2002356750A1

公开(公告)日：2003-06-10

申请号：AU2002356750

申请日：2002-11-28

Applicant: BASF AG

Inventor： ARMBRUSTER HARALD ,  EGBERS GITTA ,  FREYHOF REINHARD ,  FRIESE THORSTEN ,  HECK LUDWIG E ,  HILDENBRAND PETER ,  ZEINER HARTMUT ,  SCHOLL STEPHAN ,  GORTZ HANS-HELMUT ,  STROFER ECKHARD

IPC: C08G2/08 ,  C08G4/00

公开(公告)号：AU3547501A

公开(公告)日：2001-09-03

申请号：AU3547501

申请日：2001-02-14

Applicant: BASF AG

Inventor： WEBER MARKUS ,  STERZEL HANS-JOSEF ,  STROFER ECKHARD ,  WATZENBERGER OTTO

IPC: C01B21/14 ,  C07C217/20 ,  C07C235/60

Abstract: N,N,N-Tri((het)aryl-(hetero)alk(en)yl, (het)aryl-(hetero)alkynyl and (het)aryl-(hetero)cycloalk(en)yl)-amines (I), with a total of not less than 6 alkoxy and hydroxy substituents, and their salts are new. N,N,N-Tri((het)aryl-(hetero)alk(en)yl, (het)aryl-(hetero)alkynyl and (het)aryl-(hetero)cycloalk(en)yl)-amines of formula (I), with a total of not less than 6 alkoxy and hydroxy substituents, and their salts are new: N(A 1>R 1>)(A 2>R 2>)(A 3>R 3>) (I) A 1>, A 2>, A 3>alkylene, alkenylene, alkynylene, cycloalkylene or cycolalkenylene groups, which may have 1, 2 or 3 substituents selected from alkoxy, hydroxy and keto and/or carbon (C) atom(s) replaced by heteroatom(s) selected from nitrogen (N), oxygen (O) and sulfur (S); R 1>, R 2>, R 3>aryl or 5- or 6-membered unsaturated heterocyclyl with 1, 2 or 3 N, O or S heteroatoms. A 1>, A 2>, A 3>, R 1>, R 2> and R 3> groups contain a total of not less than 6 alkoxy and hydroxy substituents. An independent claim is also included for stabilized hydroxylamine solutions containing compound(s) (I) as stabilizer.

公开(公告)号：AU8439098A

公开(公告)日：1999-01-04

申请号：AU8439098

申请日：1998-06-18

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  SCHELLING HEINER ,  PFAB PETER ,  STROFER ECKHARD

IPC: B01D3/00 ,  C01B21/14

Abstract: PCT No. PCT/EP98/03714 Sec. 371 Date Dec. 8, 1999 Sec. 102(e) Date Dec. 8, 1999 PCT Filed Jun. 18, 1998 PCT Pub. No. WO98/57886 PCT Pub. Date Dec. 23, 1998A very pure aqueous solution of free hydroxylamine is prepared by a process in which the dilute, aqueous hydroxylamine solution is concentrated in a column by removing hydroxylamine-containing vapors via a side take-off in the bottom of the column, and very pure hydroxylamine is obtained by condensing the vapors. The novel process can be carried out simply, in a gentle manner and on a large scale and gives electronic grade hydroxylamine.