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    CONTINUOUS INDUSTRIAL PRODUCTION OF ALDEHYDE
    1.
    发明专利
    CONTINUOUS INDUSTRIAL PRODUCTION OF ALDEHYDE 失效

    公开(公告)号：JPH10338656A

    公开(公告)日：1998-12-22

    申请号：JP14286798

    申请日：1998-05-25

    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

    Abstract: PROBLEM TO BE SOLVED: To profitably obtain the subject aldehyde in a good yield by subjecting an unsaturated aliphatic alcohol and an oxygen-containing gas to an oxidative dehydrogenation reaction in a bundle reactor. SOLUTION: This method for continuously and industrially producing an aldehyde of formula II comprises passing an oxygen-containing alcohol vapor comprising the vapor of a 3-alkyl-buten-1-ol of formula I (R is H; R is isoprenal, or R and R together forms a prenal group) and an oxygen-containing gas through a silver-carried catalyst layer having a thickness of at least 0.5 cm at a temperature which is higher than the dew point of the alcohol but lower than a reaction-starting temperature, bringing the passed vapor into contact with a silver-carried catalyst in parallel plural reaction pipes each having an inner diameter of about 0.5-3 cm and a length of at least 5 cm and heated with a liquid thermal medium flowing around the reaction pipes at 300-600 deg.C to subject the vapor to an oxidative dehydrogenation reaction, immediately cooling the reaction gas and subsequently separating the aldehyde of formula II from the obtained condensed product.

    3.
    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)

    Process for the preparation of trimethyl borate
    8.
    发明专利
    Process for the preparation of trimethyl borate 未知

    公开(公告)号：DE3324419A1

    公开(公告)日：1984-01-12

    申请号：DE3324419

    申请日：1983-07-07

    Applicant: BASF AG

    Inventor： HARTMANN HORST ,  KAIBEL GERD ,  KIENER VOLKER DR ,  WOERZ OTTO DR

    IPC: C07F5/04

    Abstract: A process for the preparation of trimethyl borate by reaction of boric acid or boron trioxide and methanol in a distillation column having at least 15 separating stages and having a supply of the starting substances in a molar ratio of 3.7 to 5.5 mol of methanol per mol of boric acid at a bottom temperature of 70 to 150 DEG C and a temperature in the top of the column of 25 to 115 DEG C, water being withdrawn from the bottom and advantageously a fraction of the bottom liquid being drawn off from the bottom and fed back into the column above the bottom, and trimethyl borate and unreacted methanol being removed at the top of the column. The trimethyl borate which can be prepared by the process of the invention is used as a precursor for the preparation of boranes or sodium borohydride.

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