Apparatus for the steam cracking of hydrocarbons for the prepara

Details Apparatus for the steam cracking of hydrocarbons for the prepara Apparatus for the steam cracking of hydrocarbons for the prepara

1990-10-30

1992-06-23

Woodard, Joye L.

Mineral oils: apparatus

Vaporizing

Tubular

196116, 422197, 422204, C10G 920

Patent

active

051240033

ABSTRACT:
Apparatus for the cracking of hydrocarbons in the presence of steam for the production of olefins and diolefins which includes a thermal radiation enclosure enclosing at least one cracking tube having an inlet to which the hydrocarbons and steam are supplied and having an outlet for the cracking products. The internal diameter of the tube diminishes continuously or discontinuously from the inlet to the outlet and the ratio between the internal diameters of the tube at the inlet and the outlet is between 1.2 and 3. The ratio of the length of the tube within the enclosure to the mean internal diameter of the tube is between 200 and 600. Heat is supplied to the tube by burners within the enclosure so that the thermal power applied along the length of the tube increases in the direction from the inlet to the outlet and so that the ratio between the thermal power applied to the half of the tube extending from the inlet to the thermal power applied to the remaining half of the tube is between 40/60 and 15/85.

REFERENCES:
patent: 2917564 (1959-12-01), Pollock
patent: 2994724 (1961-08-01), Hillard et al.
patent: 3112880 (1963-12-01), Pollock
patent: 3306844 (1967-02-01), Brierley et al.
patent: 3348923 (1967-10-01), Demarest
patent: 3503949 (1970-03-01), Gaspari
patent: 3630850 (1971-12-01), Dorresteyn
patent: 3671198 (1972-06-01), Wallace
patent: 4342642 (1982-08-01), Bauer et al.

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