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    22.
    发明专利
    未知

    公开(公告)号：AT384034T

    公开(公告)日：2008-02-15

    申请号：AT03763837

    申请日：2003-07-14

    Applicant: BASF AG

    Inventor： GOEBBEL HANS-GEORG ,  GERLACH TILL ,  WEGNER GUENTER ,  FUCHS HARTWIG ,  UNVERRICHT SIGNE ,  SALDEN AXEL

    IPC: C07C29/141 ,  C07B61/00 ,  C07C33/025

    Abstract: A process is described for selectively hydrogenating citronellal to citronellol in which a liquid phase, in which the citronellal is dissolved and particles of a catalyst are suspended which is capable of preferentially hydrogenating carbon-oxygen double bonds over carbon-carbon double bonds, is conducted through a device which inhibits the transport of the catalyst particles in the presence of a hydrogen-containing gas.

    24.
    发明专利
    未知

    公开(公告)号：AT253542T

    公开(公告)日：2003-11-15

    申请号：AT01120387

    申请日：2001-08-25

    Applicant: BASF AG

    Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

    IPC: C07C41/50 ,  C07B61/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303

    Abstract: Preparation of acetals by reaction of 1 mol. of an unsaturated aldehyde with 1 mol. of an unsaturated alcohol in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. Preparation of acetals (I) by reaction of 1 mol. of an unsaturated aldehyde (II) with 1 mol. of an unsaturated alcohol (III) in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. R - R = H or optionally substituted 1-6C alkyl; and R = H, an optionally mono- or poly-unsaturated, optionally substituted 1-12C alkyl or an optionally substituted 3-12-membered optionally mono- or poly-unsaturated carbon ring.

    25.
    发明专利
    未知

    公开(公告)号：AT232193T

    公开(公告)日：2003-02-15

    申请号：AT99118458

    申请日：1999-09-17

    Applicant: BASF AG

    Inventor： THERRE JOERG DR ,  KAIBEL GERD DR ,  AQUILA WERNER DR ,  WEGNER GUENTER DR ,  FUCHS HARTWIG

    IPC: B01J27/16 ,  C07B61/00 ,  C07C41/28 ,  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.

    26.
    发明专利
    未知

    公开(公告)号：DE10044352A1

    公开(公告)日：2002-03-21

    申请号：DE10044352

    申请日：2000-09-07

    Applicant: BASF AG

    Inventor： THERRE JOERG ,  KAIBEL GERD ,  AQUILA WERNER ,  WEGNER GUENTER ,  FUCHS HARTWIG

    IPC: C07C41/50 ,  C07B61/00 ,  C07C41/56 ,  C07C41/58 ,  C07C43/303 ,  C07B41/04

    Abstract: Preparation of acetals by reaction of 1 mol. of an unsaturated aldehyde with 1 mol. of an unsaturated alcohol in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. Preparation of acetals (I) by reaction of 1 mol. of an unsaturated aldehyde (II) with 1 mol. of an unsaturated alcohol (III) in presence of an acid as catalyst and with separation of the water of reaction is effected by partly reacting the reactants in a column, concentrating the obtained acetal in ≥ 2 sequential evaporation steps and then recycling the recovered reactants to the reaction column. R - R = H or optionally substituted 1-6C alkyl; and R = H, an optionally mono- or poly-unsaturated, optionally substituted 1-12C alkyl or an optionally substituted 3-12-membered optionally mono- or poly-unsaturated carbon ring.

    28.
    发明专利
    未知

    公开(公告)号：DE19722567A1

    公开(公告)日：1998-12-03

    申请号：DE19722567

    申请日：1997-05-28

    Applicant: BASF AG

    Inventor： AQUILA WERNER DR ,  FUCHS HARTWIG ,  WOERZ OTTO DR ,  RUPPEL WILHELM DR ,  HALBRITTER KLAUS DR

    IPC: B01J23/52 ,  B01J8/02 ,  B01J8/08 ,  C07B61/00 ,  C07C45/38 ,  C07C45/67 ,  C07C47/21 ,  C07C47/22 ,  B01J23/50

    Abstract: Continuous technical preparation of aldehydes of formula (I) comprises dehydration of the corresponding alcohol of formula (II) with an oxygen-containing gas using a catalyst based on copper, silver and/or gold on an inert carrier in a multi-pipe reactor. This is followed by rapid cooling of the reaction gases, separation of the aldehyde from the resulting condensate and recycling of any unreacted alcohol. During the process (II) is vapourised, the alcohol vapour is mixed with the oxygen-containing gas, the resulting vapour is passed through a 0.5 cm layer of the catalyst at a temperature that is greater than the boiling point of the alcohol but lower than the starting temperature of the reaction and the vapour is then allowed to pass through a number of parallel pipes which are filled with catalyst and kept warm by a circulating fluid. The pipes have an inner diameter, D, of 0.5-3 cm and are at least 5 cm long and the reaction temperature is 300-600 degrees C. R1R2CHO (I) R1R2CH-CH2-OH (II) R1 = H and R2 = CH2=C(CH3)- (isoprenal); or R1+R2 = (CH3)2C= (prenal)

    CONTINUOUS INDUSTRIAL PRODUCTION OF UNSATURATED ALIPHATIC ALDEHYDES IN A TUBE BUNDLE REACTOR
    29.
    发明专利
    CONTINUOUS INDUSTRIAL PRODUCTION OF UNSATURATED ALIPHATIC ALDEHYDES IN A TUBE BUNDLE REACTOR 未知

    公开(公告)号：CA2236614A1

    公开(公告)日：1998-11-28

    申请号：CA2236614

    申请日：1998-05-27

    Applicant: BASF AG

    Inventor： FUCHS HARTWIG ,  AQUILA WERNER ,  W RZ OTTO ,  RUPPEL WILHELM ,  HALBRITTER KLAUS

    IPC: B01J23/52 ,  B01J8/02 ,  B01J8/08 ,  C07B61/00 ,  C07C45/38 ,  C07C45/67 ,  C07C47/21 ,  C07C47/22

    Abstract: A process for continuous industrial production of unsaturated aliphatic aldehydes having a boiling range from 95 to 136.degree.C by oxidative dehydrogenation of the corresponding alcohols with an oxygen-comprising gas over a supported catalyst consisting of copper, silver and/or gold on an inert support in a tube bundle reactor, rapid cooling of the reaction gases and removal of the aldehydes from the resulting condensate with recycling of the unconverted alcohols comprises a) vaporizing the alcohol, b) admixing the alcohol vapor with an oxygen-comprising gas, c) initially passing the resulting oxygen-comprising alcohol vapor at above the dew point of the alcohol but below the commencement temperature of the reaction through a layer of one of the abovementioned supported catalysts which is at least 0.5 cm in thickness and only then d) reacting the oxygen-comprising alcohol vapor at from 300 to 600.degree.C in a sufficient number, for the desired capacity, of parallel reaction tubes surrounded by a fluidic heat transfer medium, packed with the supported catalyst and having an internal diameter D of from about 0.5 to 3 cm and a length of at least 5 cm, to form the corresponding aldehyde.

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