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    Method and device for production of a homogeneous mixture of a vapour-forming aromatic hydrocarbon and an oxygen-containing gas
    21.
    发明专利
    Method and device for production of a homogeneous mixture of a vapour-forming aromatic hydrocarbon and an oxygen-containing gas 未知

    公开(公告)号：AU2172001A

    公开(公告)日：2001-07-09

    申请号：AU2172001

    申请日：2000-12-22

    Applicant: BASF AG

    Inventor： BLOCK ULRICH ,  SEUBERT ROLF ,  ULRICH BERNHARD ,  WUNSCHMANN HELMUT

    IPC: B01F23/10 ,  B01F3/04 ,  B01F5/04

    Abstract: A process and an apparatus for producing a homogeneous mixture of a gaseous aromatic hydrocarbon and an oxygen-containing gas for catalytic gas-phase reactions, in particular a homogeneous mixture of gaseous o-xylene and/or naphthalene and air for preparing phthalic anhydride, are provided. The liquid aromatic hydrocarbon is atomized to form droplets having a diameter of less than 1 mm and injected into an oxygen-containing gas stream (12) preheated to above the boiling point of the aromatic hydrocarbon. According to the invention, the liquid aromatic hydrocarbon is atomized by means of nozzles (15) which form a hollow cone (16), preferably by means of swirl nozzles. The o-xylene/air mixture is advantageously produced in a chamber which is bounded by side walls (18) heated to above the boiling point of the hydrocarbon.

    25.
    发明专利
    未知

    公开(公告)号：FI853436A0

    公开(公告)日：1985-09-09

    申请号：FI853436

    申请日：1985-09-09

    Applicant: BASF AG

    Inventor： BLOCK ULRICH

    IPC: C07D307/89 ,  C07C51/573 ,  C07D307/60 ,  F28C3/02 ,  C07D

    Abstract: The temperature of the exit gas from the gas washer in the preparation of phthalic anhydride by catalytic oxidation of naphthalene or o-xylene with air is increased by a method in which flue gas from the combustion furnace for residues is mixed with the exit gas before the latter emerges into the atmosphere.

    26.
    发明专利
    未知

    公开(公告)号：NO152371B

    公开(公告)日：1985-06-10

    申请号：NO801034

    申请日：1980-04-10

    Applicant: BASF AG

    Inventor： WOLF DIETER ,  SCHMIDT RUDOLF ,  BLOCK ULRICH ,  SCHOENMAKERS HARTMUT ,  BORR KASPAR ,  KAIBEL GERD

    IPC: C07C27/02 ,  C07C51/00 ,  C07C51/09 ,  C07C53/02 ,  C07C51/42 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00

    Abstract: Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein (a) methyl formate is hydrolyzed, (b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained, (c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid, (d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation, (e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b), (f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and (g) the extractant leaving stage (f) is recycled to the process.

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