公开(公告)号：DE102005036544A1

公开(公告)日：2007-02-15

申请号：DE102005036544

申请日：2005-08-03

Applicant: BASF AG

Inventor： LANG NEVEN ,  STROEFER ECKHARD ,  STAMMER ACHIM ,  FRIESE THORSTEN ,  SIEGERT MARKUS ,  HASSE HANS ,  GRUETZNER THOMAS ,  BLAGOV SERGEJ

IPC: C07D323/06

Abstract: The invention relates to an integrated process for preparing trioxane from formaldehyde, comprising the steps of: a) a stream A 1 comprising water and formaldehyde and a recycle stream B 2 consisting substantially of water and formaldehyde are fed to a trioxane synthesis reactor and allowed to react to obtain a product stream A 2 comprising trioxane, water and formaldehyde; b) stream A 2 is fed to a first low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream B 1 enriched in trioxane and additionally comprising water and formaldehyde, and the recycle stream B 2 consisting substantially of formaldehyde and water; c) stream B 1 and a recycle stream D 1 comprising trioxane, water and formaldehyde are fed to a second low-pressure distillation column and distilled at a pressure of from 0.1 to 2.5 bar to obtain a stream C 1 comprising predominantly trioxane and additionally formaldehyde and water, and a stream C 2 consisting substantially of formaldehyde and water; d) stream C 1 is fed to a high-pressure distillation column and distilled at a pressure of from 0.2 to 17.5 bar to obtain the recycle stream D 1 and a product stream D 2 consisting substantially of trioxane, in which a removal of the low boilers present in streams B 1 or C 1 may be undertaken between steps b) and c) or c) and d).

公开(公告)号：DE102005030282A1

公开(公告)日：2007-01-04

申请号：DE102005030282

申请日：2005-06-29

Applicant: BASF AG

Inventor： TEBBEN GERD-DIETER ,  SCHELLING HEINER ,  STROEFER ECKHARD ,  PINKOS ROLF ,  HAUNERT ANDREA ,  EIERMANN MATTHIAS ,  KARL JOERN

IPC: C10L1/18

Abstract: A biodiesel fuel mixture having a cetane number of >40, comprising a) from 1 to 100% by weight of biodiesel, b) from 0 to 98.9% by weight of diesel oil of fossil origin, c) from 0.1 to 20% by weight of polyoxyalkylene dialkyl ether of the formula RO(CH 2 O) n R in which R is an alkyl group having from 1 to 10 carbon atoms and n=from 2 to 10, and d) from 0 to 5% by weight of further additives.

公开(公告)号：DE502004001955D1

公开(公告)日：2006-12-21

申请号：DE502004001955

申请日：2004-03-03

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  LANG NEVEN ,  LICHTFERS UTE ,  STEINBRENNER ULRICH ,  HASSE HANS

IPC: B01D1/22 ,  B01D1/30 ,  C08G2/08

Abstract: A method for separating a liquid mixture containing readily-volatile and sparingly-volatile components involves using a film evaporator with a heat-exchange surface which is coated with material which catalyses the formation of readily-volatile component(s) in the liquid film. A method for separating a liquid mixture containing (A) readily-volatile and (B) sparingly-volatile components in a film evaporator by (i) producing a continuous stream of a liquid starting mixture, (ii) producing a liquid film from the mixture and bringing it into contact with a heat-exchange surface of the evaporator, and (iii) partly evaporating the film to give two gas streams rich in (A) and (B) respectively. In this method, (iv) the heat-exchange surface is coated with a catalytic material and (v) a chemical reaction in which (A) is/are formed is catalysed in the liquid film. An independent claim is also included for a film evaporator with a heat-exchanger wall which is coated with catalytic material.

公开(公告)号：DE102005027701A1

公开(公告)日：2006-12-21

申请号：DE102005027701

申请日：2005-06-15

Applicant: BASF AG

Inventor： STROEFER ECKHARD ,  HASSE HANS ,  BLAGOV SERGEJ

IPC: C07C41/48 ,  C07C41/58 ,  C07C43/303

Abstract: Processes for preparing tri- and tetraoxymethylene glycol dimethyl ether (POMDMEn=3,4) include feeding a reaction mixture of an aqueous formaldehyde solution and methanol into a reactive evaporator and separating into a first low boiler fraction and a first high boiler fraction, recycling the first high boiler fraction into the reactor, feeding the first low boiler fraction into a first distillation column and separating into a second low boiler fraction and a second high boiler fraction, recycling the second high boiler fraction into the reactive evaporator, feeding the second low boiler fraction into a second distillation column and separating into a third low boiler fraction and a third high boiler fraction, feeding the third high boiler fraction into a phase separation apparatus and separating into an aqueous phase and an organic phase, and feeding the organic phase into a third distillation column and separating into a low and high boiler fractions.

公开(公告)号：DK1406832T3

公开(公告)日：2006-12-11

申请号：DK02745423

申请日：2002-07-02

Applicant: BASF AG

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

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

Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.

公开(公告)号：DE50304616D1

公开(公告)日：2006-09-21

申请号：DE50304616

申请日：2003-12-13

Applicant: BASF AG

Inventor： SOHN MARTIN ,  STROEFER ECKHARD ,  NEVEJANS FILIP ,  PENZEL ULRICH ,  PALLASCH HANS-JUERGEN ,  VAN DEN ABEEL PETER ,  DEBERDT FILIP ,  JACOBS JAN D ,  MACKENROTH WOLFGANG

IPC: C07C263/20

Abstract: The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solvent is separated off in a two-stage or multistage, preferably two-stage, distillation process in which the solvent is separated off at a pressure of 0.1-15 bar in a first apparatus and at 1-900 mbar in a second apparatus or further apparatuses, with the heat of condensation of the solvent vapor from the first apparatus being used for partial or complete vaporization of solvent in the second apparatus.

公开(公告)号：AT335709T

公开(公告)日：2006-09-15

申请号：AT02745423

申请日：2002-07-02

Applicant: BASF AG

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

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

Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of a hydroxylammonium salt and a base in a tray column having at least two mechanical trays, wherein random or structured packings are located above at least one tray of the tray column over the cross section of the column.

公开(公告)号：DE50304309D1

公开(公告)日：2006-08-31

申请号：DE50304309

申请日：2003-12-11

Applicant: BASF AG

Inventor： OLBERT GERHARD ,  WALSDORFF CHRISTIAN ,  HARTH KLAUS ,  STROEFER ECKHARD ,  FIENE MARTIN

IPC: C01B7/04 ,  B01J8/00 ,  B01J8/06

Abstract: Preparation of chlorine involves passing hydrogen chloride and gas stream comprising molecular oxygen in a reactor (1) having parallel catalyst tubes (2) charged with fixed-bed catalyst and at least one deflector plate (6) perpendicular to the reactor. The plates leave passages on opposite sides of the reactor free next to its interior wall. A liquid heat transfer medium circulates between tubes.

公开(公告)号：DE102005008612A1

公开(公告)日：2006-08-24

申请号：DE102005008612

申请日：2005-02-23

Applicant: BASF AG

Inventor： SESING MARTIN ,  DIEFENBACHER ARMIN ,  VOS HARTWIG ,  SCHUBERT OLGA ,  SEIDEMANN LOTHAR ,  KARCHES MARTIN ,  GRASLER THOMAS ,  STROEFER ECKHARD

IPC: C01B7/04

Abstract: The stream containing hydrogen chloride (I) and the stream containing oxygen (II) are fed into an oxidation zone. The hydrogen chloride is oxidized to chlorine. A gas and a water-free gas streams are remained through the cooling and drying. The stream reversal contains chlorine-rich, chlorine, oxygen and carbon dioxide, and the liquefaction is carried out by compression and cooling (6). The gas and the water-free gas streams contain chlorine, water, oxygen, carbon dioxide and inert gases. The Gas/liquid stream is separated into a gas stream containing chlorine, oxygen, carbon dioxide and inert gases and into a fluid stream containing chlorine, oxygen and carbon dioxide. The gas stream is fed into a membrane separation unit (9) and separated into the stream reversal and chlorine-poor, chlorine, oxygen and carbon dioxide containing gas by membrane separation. The liquid stream is separated into a chlorine stream and a stream containing oxygen and carbon dioxide by distillation. The chlorine-poor and the gas stream are led into the oxidation zone, and the chlorine poor is removed.

公开(公告)号：NO20062811L

公开(公告)日：2006-07-14

申请号：NO20062811

申请日：2006-06-15

Applicant: BASF AG

Inventor： STAMMER ACHIM ,  HASSE HANS ,  STROEFER ECKHARD ,  LANG NEVEN ,  SIEGERT MARKUS ,  FRIESE THORSTEN

IPC: C07D323/06

Abstract: A process for removing trioxane from a use stream I of formaldehyde, trioxane and water, by a) providing a use stream I of formaldehyde as the main component and trioxane and water as the secondary components, b) mixing the use stream I with a recycle stream VII to obtain a feed stream Ia, c) distilling the use stream Ia in a first distillation stage to obtain a stream II of formaldehyde as the main component and water as the secondary component, and a stream III of trioxane as the main component and water and formaldehyde as the secondary components, d) distilling the stream III in a second distillation stage having a pressure higher than in the first distillation stage, to obtain a stream IV of trioxane and a stream V of trioxane as the main component and water and formaldehyde as the secondary components, e) distilling the stream V in a third distillation stage to obtain a stream VI of water and the recycle stream VII of trioxane as the main component and water and formaldehyde as the secondary components.