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公开(公告)号:JP2002114728A
公开(公告)日:2002-04-16
申请号:JP2001272755
申请日:2001-09-07
Applicant: BASF AG
Inventor: THERRE JORG , KAIBEL GERD , AQUILA WERNER DR , WEGNER GUNTER , FUCHS HARTWIG
IPC: C07C41/50 , C07B61/00 , C07C41/56 , C07C41/58 , C07C43/303
Abstract: PROBLEM TO BE SOLVED: To overcome disadvantages of the prior art and to provide a process for preparing an unsaturated acetal which is easy to regulate and can be operated in a stable manner. SOLUTION: This continuous process for preparing the unsaturated acetal of formula I (wherein, R1 to R7 are each independently hydrogen or a straight- chain or a branched, optionally substituted 1-6C alkyl group; R8 is hydrogen or a saturated or a mono- or a polyunsaturated straight-chain or branched, optionally substituted 1-12C alkyl group or a 3- to a 12-membered saturated or a mono- or a polyunsaturated carbocyclic ring) by reacting 1 mol of an aldehyde of formula II (wherein, R1 to R3 are as defined in the following formula I) with at least 1 mol of an alcohol of formula III (wherein, R5 to R8 are as defined by the following formula I) in the presence of a catalytic amount of an acid while removing water formed during the reaction, which comprises only partially reacting the reactants in a reactional column, concentrating the resultant acetal in at least two successive evaporation stages and returning the recovered reactants to the reactional column.
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公开(公告)号:AU9547501A
公开(公告)日:2002-02-25
申请号:AU9547501
申请日:2001-08-16
Applicant: BASF AG
Inventor: ISAK HEINZ , SENDHOFF NORBERT , SCHUTZ FRANZ , THERRE JORG , DROGEMULLER MICHAEL , FRANKE DIRK , MUNZINGER MANFRED , WECK ALEXANDER , BURKART KIRSTEN
IPC: A01N25/12 , A01N43/88 , C07D285/34
Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.
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公开(公告)号:CA2418972C
公开(公告)日:2010-03-23
申请号:CA2418972
申请日:2001-08-16
Applicant: BASF AG
Inventor: ISAK HEINZ , SENDHOFF NORBERT , SCHUTZ FRANZ , THERRE JORG , DROGEMULLER MICHAEL , FRANKE DIRK , MUNZINGER MANFRED , WECK ALEXANDER , BURKART KIRSTEN
IPC: C07D285/34 , A01N25/12 , A01N43/88
Abstract: A method for the production of a particle-containing preparation of tetrahydro-3,5-dimethyl-1,3,5-thiadiazin-2-thione, by combination of a first aqueous solution containing methylammonium-N-methyldithiocarbamate with a second solution containing formaldehyde and separation and drying of the solid formed is disclosed. The invention is characterised in that the first and second solutions are combined such that over the duration of the reaction the ratio of the concentration of dithiocarbamate functions and formaldehyde in the reaction mixture remains essentially constant over time.
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公开(公告)号:ES2189014T3
公开(公告)日:2003-07-01
申请号:ES98102955
申请日:1998-02-20
Applicant: BASF AG
Inventor: KIEFER MATTHIAS , SIEGEL WOLFGANG , THERRE JORG , PAHL MELANIE , AQUILA WERNER , SCHAFER-LUDERSSEN ULRICH
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公开(公告)号:CA2335068C
公开(公告)日:2005-05-17
申请号:CA2335068
申请日:1999-06-02
Applicant: BASF AG
Inventor: SANDER MICHAEL , STROFER ECKHARD , THERRE JORG , RICHTER SIEGFRIED , HANTEL BURGHARD , LEUTHOLD RENE , SCHWARZ HANS VOLKMAR , MAURER MARKUS
IPC: C07C263/20 , C07C209/62 , C07C211/51 , C07C263/10 , C07C263/18 , C07C265/14 , C08G18/50 , C08G65/26
Abstract: The invention relates to a method for treating distillation residues from th e synthesis of toluene diisocyanate by reacting the distillation residues with water. The invention is characterized in that the TDI distillation residues are reacted with water in a continuos or semi-continuo s method in a back-mixed reactor in the presence of hydrolyzates.
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公开(公告)号:PT992477E
公开(公告)日:2003-06-30
申请号:PT99118458
申请日:1999-09-17
Applicant: BASF AG
Inventor: THERRE JORG , KAIBEL GERD , AQUILA WERNER , FUCHS HARTWIG , WEGNER GUNTER
IPC: C07B61/00 , C07C41/28 , B01J27/16 , C07C43/15 , C07C45/37 , C07C45/51 , C07C45/54 , C07C45/67 , C07C47/21 , C07C49/203
Abstract: Preparation of citral (I) comprises thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal and rearrangement of obtained intermediates cis/trans-prenyl-(methyl-butadienyl)-ether (IV) and 2,4,4-trimethyl-3-formyl-1,5-hexadiene (V). (IV) and (V) are continuously distilled off and converted into (I) before or after removal of by-product prenol. Preparation of 3,7-dimethyl-2,6-octadien-1-al (citral) of formula (I) comprises: (1) thermal decomposition of 3-methyl-2-buten-1-al-diprenylacetal of formula (II) optionally in the presence of an acid catalyst to split off 3-methyl-buten-1-ol (prenol) of formula (III) and form cis/trans-prenyl-(methyl-butadienyl)-ether of formula (IV); (2) Claisen rearrangement of (IV) to give 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula (V); and (3) Cope rearrangement of (V) to form (I). The transitionally formed (IV) and (V) and the desired citral as well as the prenol (III) are continuously distilled out of the reaction mixture and (IV) and (V), before or after distillative separation of (III) and optional by-products, are subjected to rearrangement to form (I) at 100-200 degrees C.
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公开(公告)号:CA2335068A1
公开(公告)日:1999-12-23
申请号:CA2335068
申请日:1999-06-02
Applicant: BASF AG
Inventor: LEUTHOLD RENE , SANDER MICHAEL , STROFER ECKHARD , SCHWARZ HANS VOLKMAR , HANTEL BURGHARD , THERRE JORG , MAURER MARKUS , RICHTER SIEGFRIED
IPC: C07C263/20 , C07C209/62 , C07C211/51 , C07C263/10 , C07C263/18 , C07C265/14 , C08G18/50 , C08G65/26
Abstract: The invention relates to a method for treating distillation residues from th e synthesis of toluene diisocyanate by reacting the distillation residues with water. The invention is characterized in that the TDI distillation residues are reacted with water in a continuos or semi-continuos method in a back-mix ed reactor in the presence of hydrolyzates.
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公开(公告)号:SK285932B6
公开(公告)日:2007-11-02
申请号:SK1922003
申请日:2001-08-16
Applicant: BASF AG
Inventor: ISAK HEINZ , SENDHOFF NORBERT , SCHUTZ FRANZ , THERRE JORG , DROGEMULLER MICHAEL , FRANKE DIRK , MUNZINGER MANFRED , WECK ALEXANDER , BURKART KIRSTEN
IPC: C07D285/00 , A01N25/00 , A01N25/12 , A01N43/00 , A01N43/88 , C07D285/34
Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction, and separating the solid form the resulting suspension.
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公开(公告)号:EA005202B1
公开(公告)日:2004-12-30
申请号:EA200300221
申请日:2001-08-16
Applicant: BASF AG
Inventor: ISAK HEINZ , SENDHOFF NORBERT , SCHUTZ FRANZ , THERRE JORG , DROGEMULLER MICHAEL , FRANKE DIRK , MUNZINGER MANFRED , WECK ALEXANDER , BURKART KIRSTEN
IPC: A01N25/12 , A01N43/88 , C07D285/34
Abstract: Визобретенииописываетсяспособполученияпорошковойкомпозициитетрагидро-3,5-диметил-1,3,5-тиадиазин-2-тиона, осуществляемыйпутемобъединениядвухводныхрастворов, одинизкоторыхсодержит N-метилдитиокарбаматметиламмония, адругойсодержитформальдегид, споследующимвыделениемобразовавшегосятвердогопродуктаи егосушкой. Такойспособотличаетсятем, чтопервыйи второйводныерастворыобъединяюттакимобразом, чтобысоотношениеконцентрацийфункциональныхгруппдитиокарбаматаи формальдегидав реакционнойсмесинапротяжениивсейреакцииоставалосьпрактическипостоянным.
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公开(公告)号:SK1922003A3
公开(公告)日:2003-08-05
申请号:SK1922003
申请日:2001-08-16
Applicant: BASF AG
Inventor: ISAK HEINZ , SENDHOFF NORBERT , SCHUTZ FRANZ , THERRE JORG , DROGEMULLER MICHAEL , FRANKE DIRK , MUNZINGER MANFRED , WECK ALEXANDER , BURKART KIRSTEN
IPC: A01N25/12 , A01N43/88 , C07D285/34
Abstract: Described is a process for the preparation of a particulate tetrahydro-3,5-dimethyl-1,3,5-thiadiazine-2-thione product by combining a first aqueous solution comprising methylammonium N-methyldithiocarbamate with a second aqueous solution comprising formaldehyde, followed by separation and drying of the resulting solid, which comprises combining the first and the second aqueous solutions in such a way that the ratio between the concentrations of dithiocarbamate functions and of formaldehyde is essentially constant in the reaction mixture over time during the duration of the reaction.
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