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    5.
    发明专利
    未知

    公开(公告)号：NO149434B

    公开(公告)日：1984-01-09

    申请号：NO772309

    申请日：1977-06-30

    Applicant: BASF AG

    Inventor： TREPTOW WOLFRAM ,  WUNSCH GERD ,  KIENER VOLKER ,  MEYER HERMANN ,  CSIZI GOTTHARD

    IPC: C25B1/46 ,  C25B9/19 ,  C25B13/04 ,  C25B9/00

    Abstract: In an electrolysis cell with anodes and cathodes which are provided with openings, the cathode chamber is separated from the anode chamber by a diaphragm. The latter consists of a porous layer of oxides or oxidic compounds of the elements of sub-group 4B of the periodic table, of aluminum, of the rare earths or of chromium. The diaphragm is applied to that side of one of the electrodes which faces the counter-electrode.

    6.
    发明专利
    未知

    公开(公告)号：NO772309L

    公开(公告)日：1978-01-10

    申请号：NO772309

    申请日：1977-06-30

    Applicant: BASF AG

    Inventor： TREPTOW WOLFRAM ,  WUNSCH GERD ,  KIENER VOLKER ,  MEYER HERMANN ,  CSIZI GOTTHARD

    IPC: C25B1/46 ,  C25B9/19 ,  C25B

    Abstract: In an electrolysis cell with anodes and cathodes which are provided with openings, the cathode chamber is separated from the anode chamber by a diaphragm. The latter consists of a porous layer of oxides or oxidic compounds of the elements of sub-group 4B of the periodic table, of aluminum, of the rare earths or of chromium. The diaphragm is applied to that side of one of the electrodes which faces the counter-electrode.

    Production of olefins, particularly ethylene, by thermal cracking of hydrocarbons
    7.
    发明专利
    Production of olefins, particularly ethylene, by thermal cracking of hydrocarbons 未知

    公开(公告)号：GB1087512A

    公开(公告)日：1967-10-18

    申请号：GB859366

    申请日：1966-02-28

    Applicant: BASF AG

    Inventor： BUSCHMANN KARL ,  MARKERT FERDINAND ,  MEYER HERMANN ,  RICHTER GOTTFRIED ,  SCHWEITZER ARMIN

    IPC: B01D51/10 ,  C07C4/04 ,  C10G9/00 ,  F28D7/00 ,  F28D7/14 ,  F28F9/26

    Abstract: Low molecular weight olefins, particularly ethylene, are obtained by thermal cracking in a cracking tube at above 750 DEG C. of aliphatic hydrocarbons having a final b.p. below 300 DEG C., e.g. light naphtha, followed by cooling to below 400 DEG C. in a cooling unit comprising either a single-tube cooler or a single-tube cooler followed by a multi-tube cooler, the single-tube cooler in either case being connected to the cracking tube by a connecting-piece so short that the residence time of the cracked gas in the connecting-piece is less than 0.01 sec. The connecting piece is preferably installed in the brickwork of the furnace casing, and is usually conical, the internal diameter of the cooling tube being greater than that of the cracking tube. More than one cracking tube may be connected to the same cooling unit. The process is stated to reduce undesirable side-reactions in the cracked gas, e.g. deposition of coke and production of methane and hydrogen.

    9.
    发明专利
    未知

    公开(公告)号：FR1432867A

    公开(公告)日：1966-03-25

    申请号：FR8274

    申请日：1965-03-08

    Applicant: BASF AG ,  SCHMIDT SCHE HEISSDAMPF

    Inventor： BUSCHMANN KARL ,  MARKERT FERDINAND ,  MEYER HERMANN ,  VOLLHARDT FROHMUT

    IPC: B01D51/10 ,  C07C4/04 ,  C10G9/00

    Abstract: In the production of ethylene by thermal cracking of hydrocarbons at above 750 DEG C., followed by indirect cooling in quench boilers, the gases are passed through the cooling tubes at a speed above 50 kg./m.2/sec., e.g. 60-70 kg./m.2/sec. The temperature of the cooling tubes is preferably above 310 DEG C. maintained by a steam pressure of at least 100 atmospheres. The velocity of the gas in the inlet cone of the boiler should be above 20 kg./cu.m./sec.

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