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公开(公告)号：AT346037T
公开(公告)日：2006-12-15
申请号：AT03789289
申请日：2003-12-16
Applicant: BASF AG
IPC: C07C263/10 , C07C263/20 , C07C265/14
Abstract: Method for purifying isocyanates (I) by distillation. Method for purifying isocyanates by distillation comprises: (a) first separating a stream (1) containing (I), high and low boilers and non-evaporatable residue (X) by distillation (at least one theoretical plate) into a sidestream (2), containing (I) and (X), and a vapor stream (3), containing (I) and low boilers; (b) (X) in (2) is kept separate from (3) and/or material streams that consist at least partly of (3); (c) another (I)-containing vapor stream (4) is separated from (2), leaving stream (8) consisting essentially of (X); (d) streams (4) and (3) are separated by distillation into 3 streams (5,6,7) of different boiling ranges, where the lowest boiler (5) contains a significant proportion of the low boilers in (1), the highest boiler (7) contains a significant proportion of the high boilers in (1) and the middle stream (6) is essentially (I).
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公开(公告)号：AT344693T
公开(公告)日：2006-11-15
申请号：AT04716558
申请日：2004-03-03
Applicant: BASF AG
Inventor： STROEFER ECKHARD , LANG NEVEN , LICHTFERS UTE , STEINBRENNER ULRICH , HASSE HANS
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.
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公开(公告)号：NO20062749L
公开(公告)日：2006-07-12
申请号：NO20062749
申请日：2006-06-13
Applicant: BASF AG
Inventor： STAMMER ACHIM , HASSE HANS , STROEFER ECKHARD , GRUETZNER THOMAS , LANG NEVEN , SIEGERT MARKUS , FRIESE THORSTEN , OTT MICHAEL , BLAGOV SERGEJ
IPC: B01D3/14 , B01D3/36 , C07D323/06
Abstract: A process for removing trioxane from a mixture I of formaldehyde, trioxane and water, by a) distilling the mixture I in a first distillation stage at a pressure of from 0.1 to 2 bar to obtain a stream II which comprises formaldehyde and a stream III which comprises predominantly trioxane and additionally water and formaldehyde, b) mixing the stream III with a recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde to obtain a stream IIIa which comprises predominantly trioxane and additionally water and formaldehyde, c) distilling the stream IIIa, if appropriate after removing low boilers from the stream III or IIIa in a further distillation stage, in a second distillation stage at a pressure of from 0.2 to 10 bar, the pressure in the second distillation stage being at least 0.1 bar higher than the pressure in the first distillation stage, to obtain a stream IV of trioxane and a stream V which comprises predominantly trioxane and additionally water and formaldehyde, d) distilling the stream V in a third distillation stage at a pressure of from 0.1 to 4 bar to obtain a stream VI which comprises predominantly water and additionally formaldehyde, and the recycle stream VII which comprises predominantly trioxane and additionally water and formaldehyde, e) if appropriate, distilling the stream VI in a fourth distillation stage to obtain a stream VIII which comprises predominantly water, and a stream IX which comprises predominantly formaldehyde.
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公开(公告)号：DE102004053839A1
公开(公告)日：2006-05-11
申请号：DE102004053839
申请日：2004-11-04
Applicant: BASF AG
Inventor： SCHELLING HEINER , STROEFER ECKHARD , PINKOS ROLF , HAUNERT ANDREA , TEBBEN GERD-DIETER , HASSE HANS , BLAGOV SERGEJ
Abstract: Preparation of a polyoxymethylene dimethyl ether (I) comprises feeding methylal and trioxane to a reactor and reacting in the presence of an acidic catalyst, where the quantity of water introduced into the reaction mixture by means of the methylal, trioxane and/or the catalyst is less than 1 wt.%, related to the reaction mixture. Preparation of a polyoxymethylene dimethyl ether (I) of formula (H 3CO(CH 2O) nCH 3) (where n is 2-10) comprises feeding methylal and trioxane to a reactor and reacting in the presence of an acidic catalyst, where the quantity of water introduced into the reaction mixture by means of the methylal, trioxane and/or the catalyst are less than 1 wt.%, related to the reaction mixture.
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公开(公告)号：DE102004026095A1
公开(公告)日：2005-12-15
申请号：DE102004026095
申请日：2004-05-25
Applicant: BASF AG
Inventor： WOELFERT ANDREAS , PALLASCH HANS-JUERGEN , STROEFER ECKHARD , PENZEL ULRICH , DEBERDT FILIP
IPC: C07C263/10 , C07C265/12 , C07C265/14
Abstract: A process for the preparation of isocyanates by reacting amines with phosgene, the phosgene-containing stream of starting materials (i) being substantially free of isocyanates and (ii) having a mass content of hydrogen chloride (referred to below as HCl) of less than 0.4% by mass, and a production plant for carrying out the process according to the invention.
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Patent Agency Ranking
公开(公告)号：DE10361517A1
公开(公告)日：2005-07-28
申请号：DE10361517
申请日：2003-12-23
Applicant: BASF AG
Inventor： OLBERT GERHARD , JOHANN THORSTEN , WEBER MARKUS , LANG NEVEN , HARTH KLAUS , STROEFER ECKHARD , 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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147.发明专利
公开(公告)号：CA2548640A1
公开(公告)日：2005-07-14
申请号：CA2548640
申请日：2004-12-21
Applicant: BASF AG
Inventor： GRUETZNER THOMAS , STROEFER ECKHARD , HASSE HANS , BLAGOV SERGEJ , STAMMER ACHIM , OTT MICHAEL , SIEGERT MARKUS , FRIESE THORSTEN , LANG NEVEN
IPC: B01D3/36 , B01D3/14 , C07D323/06
Abstract: The invention relates to a method for separating trioxane from a mixture containing formaldehyde, trioxane and water. According to said method: the mixture (1) is distilled in a first distillation stage (7) at a pressure of between 0.1 and 2 bar to obtain a stream (8) containing formaldehyde and a stream (9) containing predominantly trioxane, in addition to water and formaldehyde; the stream (9) is mixed with a recycling stream (19) containin g predominantly trioxane, in addition to water and formaldehyde to form a stre am (10) containing predominantly trioxane, in addition to water and formaldehyd e; the stream (10) is then distilled in a second distillation stage (14) at a pressure of between 0.2 and 10 bar, optionally after the separation of low- boilers from the stream (9) or (10) in an additional distillation stage (11) . The pressure in the second distillation stage (14) is at least 0.1 bar highe r than the pressure in the first distillation stage (7). Said distillation produces a stream (15) consisting of trioxane and a stream (16) containing predominantly trioxane, in addition to water and formaldehyde. The stream (1 6) is then distilled in a third distillation stage (17) at a pressure of betwee n 0.1 and 4 bar, to obtain a stream (18) containing predominantly water, in addition to formaldehyde and the recycling stream (19) containing predominantly trioxane, in addition to water and formaldehyde. The resultant stream (18) is optionally distilled in a fourth distillation stage (20), to obtain a stream (21) containing predominantly water and a stream (22) containing predominantly formaldehyde.
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公开(公告)号：CA2548367A1
公开(公告)日：2005-07-14
申请号：CA2548367
申请日：2004-12-23
Applicant: BASF AG
Inventor： SIEGERT MARKUS , STROEFER ECKHARD , OLBERT GERHARD , LANG NEVEN , JOHANN THORSTEN , WEBER MARKUS , FIENE MARTIN
Abstract: The invention relates to a method for the production of formaldehyde by gas phase oxidation of methanol vapour with a gas flow containing a molecular oxygen in the presence of solid bed catalyst containing iron and molybdenum. The invention is characterised in that the method is carried out in a reacto r (1) comprising thermal sheet metal plates (2) which are arranged at a distan ce from each other and in the longitudinal direction of the reactor (1), said thermal sheet metal plates being cross-flown by a heat carrier. The reactor also comprises devices for supplying and withdrawing (3, 4) the heat carrier to/from the thermal sheet steel plates (2), and gaps (5), which are disposed between the thermal sheet steel metal plates (2) and which are filled with t he solid bed catalyst and are introduced into the gas flow containing the methanol vapour and the molecular oxygen.
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公开(公告)号：DE10336522A1
公开(公告)日：2005-02-24
申请号：DE10336522
申请日：2003-08-08
Applicant: BASF AG
Inventor： WALSDORFF CHRISTIAN , FIENE MARTIN , SESING MARTIN , METELKINA OLGA , SEIDEMANN LOTHAR , STROEFER ECKHARD , HARTH KLAUS
IPC: C01B7/04
Abstract: The invention relates to a process for preparing chlorine by catalytic gas-phase oxidation of hydrogen chloride, which comprises the steps: a) providing a feed gas stream I comprising hydrogen chloride and a feed gas stream II comprising oxygen; b) in a first oxidation stage, feeding the feed gas stream I, the feed gas stream II, if desired a recycle stream la comprising hydrogen chloride and if desired an oxygen-containing recycle stream IIa into a first oxidation zone and bringing them into contact with a first oxidation catalyst so that a first partial amount of the hydrogen chloride is oxidized to chlorine and a gas stream III comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor is obtained; c) in a second oxidation stage, feeding the gas stream III into a second oxidation zone and bringing it into contact with at least one further oxidation catalyst so that a second partial amount of the hydrogen chloride is oxidized to chlorine and a product gas stream IV comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor is obtained; d) isolating chloride, if desired the recycle stream Ia and if desired the recycle stream IIa from the product gas stream IV, wherein the first oxidization catalyst in the first oxidation zone is present in a fluidized bed and the further oxidation catalyst or catalysts in the second oxidation zone is/are present in a fixed bed.
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公开(公告)号：DE50201806D1
公开(公告)日：2005-01-20
申请号：DE50201806
申请日：2002-07-02
Applicant: BASF AG
Inventor： WOSTBROCK KARL-HEINZ , STROEFER ECKHARD , WEBER MARKUS , KERTH STEFFEN
IPC: C01B21/14
Abstract: A process for preparing a salt-free aqueous hydroxylamine solution by reacting an aqueous solution of a hydroxylammonium salt with a base to give a mixture and separating from said mixture by distillation a salt-free aqueous hydroxylamine solution, involving using as a base an aqueous solution of a mixture of NaOH and KOH in a molar ratio Na + :K + in the range from 70:30 to 95:5 and with a total concentration of Na + and K + in the range from 0.1 to 10 m/m % based on the total amount of the mixture.
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