公开(公告)号：DE10131788A1

公开(公告)日：2003-01-16

申请号：DE10131788

申请日：2001-07-04

Applicant: BASF AG

Inventor： WOSTBROCK KARL-HEINZ ,  THIEL JOACHIM ,  GERBER BERND ,  KRUEGER HEINZ ,  STROEFER ECKHARD ,  KERTH STEFFEN ,  SACHWEH BERND ,  RUMPF BERND ,  WEBER MARKUS

IPC: B01D3/14 ,  B01D3/16 ,  B01J19/30 ,  B01J19/32 ,  C01B21/14 ,  B01D3/00

Abstract: The invention relates to a method for producing a highly pure, aqueous hydroxylamine solution by distilling an aqueous solution, devoid of salt, of a hydroxyl ammonium salt in a plate column comprising at least two mechanical plates. Said method is characterised in that packing bodies are arranged between at least two plates of the plate column over the cross-section of said column.

公开(公告)号：DE10129233A1

公开(公告)日：2003-01-02

申请号：DE10129233

申请日：2001-06-19

Applicant: BASF AG

Inventor： WOELFERT ANDREAS ,  MUELLER CHRISTIAN ,  STROEFER ECKHARD

IPC: C07C263/10 ,  C07C265/14

Abstract: The invention relates to a method for producing isocyanates by reacting primary amines with phosgene, and using isocyanate as the solvent. The inventive method is characterized in that a portion or the entire quantity of the isocyanate used as the solvent is only added to the reaction batch once the amine and the phosgene have been combined.

公开(公告)号：NO20025379D0

公开(公告)日：2002-11-08

申请号：NO20025379

申请日：2002-11-08

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  WOSTBROCK KARL-HEINZ ,  WEBER MARKUS

IPC: B01D3/00 ,  A23K20/105 ,  C07B61/00 ,  C07C51/10 ,  C07C51/42 ,  C07C51/44 ,  C07C53/04 ,  C07C53/06 ,  C07C

公开(公告)号：AT220386T

公开(公告)日：2002-07-15

申请号：AT98943835

申请日：1998-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：TR200000299T2

公开(公告)日：2001-01-22

申请号：TR200000299

申请日：1998-08-04

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：DE19925870A1

公开(公告)日：2000-12-14

申请号：DE19925870

申请日：1999-06-07

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  SCHOLL STEPHAN ,  HASSE HANS

IPC: B01D1/22 ,  C07B63/00 ,  C07C29/80 ,  C07C41/56 ,  C07C43/303 ,  C07C45/82 ,  C07C47/04 ,  C07C47/058 ,  C07B61/00

Abstract: A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (a) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (b) reacting one fraction with the other reactant(s) before equilibrium is completely restored. A method for reacting a solution containing a mixture of at least two chemicals in chemical equilibrium with other chemical(s) involves: (1) separating the solution into at least two fractions, enriched in the various compounds relative to the equilibrium concentrations; and (2) reacting one fraction with the other reactant(s) before equilibrium is completely restored. Excluded is the reaction of a formaldehyde solution, containing polyoxymethylene glycols and optionally monomeric formaldehyde and/or methylene glycol, with aniline in presence of an acid catalyst.

公开(公告)号：NO20000551L

公开(公告)日：2000-04-04

申请号：NO20000551

申请日：2000-02-03

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14 ,  C01B

Abstract: An aqueous solution of free hydroxylamine is prepared by treating a hydroxylammonium salt with ammonia by the countercurrent method in a stripping column by a process in which hydroxylamine is liberated and at the same time the solution obtained is separated by distillation into an aqueous hydroxylamine solution and a salt fraction. The novel process can be carried out in a simple and gentle manner and on a large scale. The danger of decomposition is minimized owing to the low thermal load, the low concentration of hydroxylamine and the short residence time in the process.

公开(公告)号：NO20000551A

公开(公告)日：2000-04-04

申请号：NO20000551

申请日：2000-02-03

Applicant: BASF AG

Inventor： WATZENBERGER OTTO ,  MAUER PETER ,  STROEFER ECKHARD ,  SCHELLING HEINER ,  SCHNEIDER HANS-MICHAEL

IPC: C01B21/14 ,  C01B

CPC classification number: C01B21/1445

公开(公告)号：DE19828510A1

公开(公告)日：1999-12-30

申请号：DE19828510

申请日：1998-06-26

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  PFEFFINGER JOACHIM

IPC: B01J19/18 ,  C07C263/10 ,  C07C265/08 ,  C07C265/14 ,  C07C263/20

Abstract: In the simultaneous production of isocyanates (I) by reacting the corresponding amines (II) with phosgene (COCl2), reaction is carried out in a mixer and subsequent dwell reactor, then the reaction mixture is freed from excess COCl2 and hydrogen chloride (HCl) and separated into individual (I) fractions.

公开(公告)号：AU2006310719B2

公开(公告)日：2011-03-31

申请号：AU2006310719

申请日：2006-06-12

Applicant: BASF AG

Inventor： BLAGOV SERGEJ ,  HASSE HANS ,  STROEFER ECKHARD

IPC: C08G65/00

Abstract: Preparing tri-/tetra oxymethylene glycol dimethylether (I) comprises e.g. distilling an aqueous formaldehyde solution and methanol in a reactor to form a reaction mixture containing polyoxy methylene glycol dimethylether (III); distilling the reaction mixture to form a high-boiling fraction (A2) containing e.g. (III); distilling (A2) to form e.g. a low-boiling fraction (A3) having e.g. (I); distilling (A3) to form a high-boiling fraction (A5) having e.g. (I); and distilling (A5) to form an organic phase containing (I). Preparing tri-/tetra oxymethylene glycol dimethylether through the conversion of formaldehyde with methanol and successive distillation of a reaction mixture, comprises: feeding an aqueous formaldehyde solution and methanol in a reactor to form the reaction mixture containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, methylal and polyoxymethylene glycol dimethylether (III); feeding the reaction mixture into a first distillation column (5) and separating a low-boiling fraction (A1) containing formaldehyde, water, methylene glycol, methanol, methylal and polyoxy methylene glycoldimethylether and a high-boiling fraction (A2) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and (III); feeding (A2) into a second distillation column (8) and separating a low-boiling fraction (A3) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol, methanol, hemiformal, di-chloroethylene and (I) and a high-boiling containing polyoxymethylene glycol, high-boiling hemiformal and high-boiling polyoxymethylene glycol dimethylether; feeding (A3) and optionally feed-back stream containing formaldehyde, water, methylene glycol and polyoxymethylene glycol into a third distillation column (13) and separating a high volatile fraction (A4) containing formaldehyde, water, methanol, polyoxymethylene glycol, hemiformal and dioxymethylene glycol dimethylether and a high-boiling fraction (A5) containing formaldehyde, water, methylene glycol, polyoxymethylene glycol and (I); feeding (A5) in to a phase separator and separating an aqueous phase containing formaldehyde, water, methylene glycol and polyoxymethyleneglycol and an organic phase containing (I); feeding the organic phase into a fourth distillation column (18) and separating a low-boiling fraction (A6) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing (I); and optionally feeding the aqueous phase in a fifth distillation column (24) and separating a low-boiling fraction (A7) containing formaldehyde, water, methylene glycol and polyoxymethylene glycol and a high-boiling fraction containing water.