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公开(公告)号：AU9158698A
公开(公告)日：1999-03-01
申请号：AU9158698
申请日：1998-08-04
Applicant: BASF AG
Inventor： WATZENBERGER OTTO , MAUER PETER , STROFER 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.
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公开(公告)号：CA2450107C
公开(公告)日：2009-09-22
申请号：CA2450107
申请日：2002-07-02
Applicant: BASF AG
Inventor： GERBER BERND , WEBER MARKUS , KRUGER HEINZ , STROFER ECKHARD , THIEL JOACHIM , RUMPF BERND , WOSTBROCK KARL-HEINZ , SACHWEH BERND , KERTH STEFFEN
Abstract: The invention relates to a method for the production of a salt-free aqueous hydroxylamine solution by distilling an aqueous solution of an hydroxylammonium salt and a base in a plate column having at least two mechanical plates. The invention is characterized in that packings or structured packings are placed above at least one of the plates of the plate column along the cross section of said column.
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公开(公告)号：NO20075864A
公开(公告)日：2008-03-05
申请号：NO20075864
申请日：2007-11-15
Applicant: BASF AG
Inventor： STROFER ECKHARD , HASSE HANS , BLAGOV SERGEJ
CPC classification number: C07C41/50 , C07C41/58 , C07C43/303 , C07C43/30
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公开(公告)号：AU2006259100A1
公开(公告)日：2006-12-21
申请号：AU2006259100
申请日：2006-06-12
Applicant: BASF AG
Inventor： BLAGOV SERGEJ , HASSE HANS , STROFER ECKHARD
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.
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公开(公告)号：NO20062493L
公开(公告)日：2006-06-09
申请号：NO20062493
申请日：2006-05-31
Applicant: BASF AG
Inventor： STROFER ECKHARD , WEBER MARKUS , OLBERT GERHARD , JOHANN THORSTEN , LANG NEVEN , FIENE MARTIN , SIEGERT MARKUS
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.
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Patent Agency Ranking
公开(公告)号：AU2003293841A1
公开(公告)日：2004-06-30
申请号：AU2003293841
申请日：2003-12-11
Applicant: BASF AG
Inventor： OLBERT GERHARD , WALSDORFF CHRISTIAN , HARTH KLAUS , STROFER ECKHARD , FIENE MARTIN
Abstract: Preparation of chlorine involves passing hydrogen chloride and molecular oxygen in a reactor (1) having parallel catalyst tubes (2) charged with fixed-bed catalyst aligned in longitudinal direction of reactor; and alternatively arranged annular and disk-shaped deflection plates (6 and 7) which leave annular passage (9) free. A liquid heat transfer medium circulates between tubes.
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公开(公告)号：AU2003285303A1
公开(公告)日：2004-05-13
申请号：AU2003285303
申请日：2003-10-27
Applicant: BASF AG
Inventor： WALSDORFF CHRISTIAN , FIENE MARTIN , KUHRS CHRISTIAN , STROFER ECKHARD , HARTH KLAUS
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.
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公开(公告)号：AU2003232760A8
公开(公告)日：2003-12-02
申请号：AU2003232760
申请日：2003-05-13
Applicant: BASF AG
Inventor： HECK LUDWIG , HILDENBRAND PETER , EGBERS GITTA , FREYHOF REINHARD , ARMBRUSTER HARALD , STROFER ECKHARD , FRIESE KATRIN , FRIESE THORSTEN , RAULS MATTHIAS , ZEINER HARTMUT
IPC: C07D323/06
Abstract: Production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: distillation of the crude trioxane; crystallization of the trioxane and; separation from the mother liquor followed by melting and distillation of other byproducts. A process for the production of trioxane by trimerization of formaldehyde in aqueous acid solution followed by separation of trioxane from a crude trioxane product mixture of trioxane, water and formaldehyde comprises: (a) distillation of the crude trioxane; (b) crystallization of the trioxane and; (c) separation from the mother liquor followed by; (d) melting and; (e) distillation of other byproducts.
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公开(公告)号：AU2002250959A1
公开(公告)日：2003-09-04
申请号：AU2002250959
申请日：2002-02-15
Applicant: BASF AG
Inventor： STROFER ECKHARD , BREDEHOFT JAN PETER , PALLASCH HANS-JURGEN , HECK LUDWIG E
IPC: B01D1/30 , B01D3/32 , B60P1/28 , C07C263/10 , C07C265/14 , B01D3/00
Abstract: An arrangement for carrying out chemical reactions comprises at least one distillation column and/or at least one container and at least one circulation evaporator, which are connected to one another via connecting elements, liquid being taken off completely or partly from a tray or from a stacked packing bed or from a dumped packing bed or from a liquid collector of the distillation column or being fed as an external feed stream below the lower tube sheet of the circulation evaporator to said evaporator.
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公开(公告)号：AU2002351846A1
公开(公告)日：2003-05-19
申请号：AU2002351846
申请日：2002-11-05
Applicant: BASF AG
Inventor： STROFER ECKHARD , HASSE HANS , SOHN MARTIN , SCHILLING KLEMENS
Abstract: In an aqueous formaldehyde solution comprising formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in a total concentration x of >=65% by weight, the mean molar mass {overscore (M of the polyoxymethylene glycols is, as a function of the formaldehyde concentration, equal to or less than the values given by equation I: ( M _ g / mol ) = 48 + 6.589 . 10 - 1 . ( x % by weight ) + 4.725 . 10 2 . ( x % by weight ) 2 - 3.434 . 10 - 3 . ( x % by weight ) 3 + 9.625 . 10 - 5 . ( x % by weight ) 4 - 1.172 . 10 6 . ( x % by weight ) 5 + 5.357 . 10 - 9 . ( x % by weight ) 6 ( I ) where: {overscore (M is the mean molar mass, and x is the total concentration of formaldehyde in the form of monomeric formaldehyde, methylene glycol and polyoxymethylene glycols in % by weight (total formaldehyde concentration).
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