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    Production of acetylene
    14.
    发明专利
    Production of acetylene 未知

    公开(公告)号：GB942436A

    公开(公告)日：1963-11-20

    申请号：GB1393362

    申请日：1962-04-11

    Applicant: BASF AG

    Inventor： DANZ WILLI ,  FREY OTTO ,  KITTEL ERICH ,  MARKERT FERDINAND ,  TELTSCHIK WALTER

    IPC: B01D51/10 ,  C07C2/78 ,  C07C7/11 ,  C07C11/24

    Abstract: In the production of acetylene by subjecting hydrocarbons to high temperatures, the hot gas is quenched in a single stage by injecting a hydrocarbon oil boiling above 150 DEG C. in a volume ratio to gas (measured under standard conditions) of at least 1 : 100 without any appreciable cracking of the oil and separating the hot oil containing carbon black from the gas. The oil is preferably an aromatic oil and useful heat is extracted from it before its reuse; the carbon black content is preferably reduced to below 35% by weight e.g. by removing part of the oil and replacing this by fresh oil. The gas is preferably also later washed with an oil boiling in the range 80-450 DEG C. having a specific gravity below 0.95. The examples relate to the partial combustion of gasoline and of methane; reference is also made to heating hydrocarbons by electric discharge and exposure to hot flame gases. Specification 893,504 is referred to.

    Production of olefins, particularly ethylene, by thermal cracking of hydrocarbons
    16.
    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.

    18.
    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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