Process for endothermic conversion of hydrocarbons, its...

Details Process for endothermic conversion of hydrocarbons, its... Process for endothermic conversion of hydrocarbons, its...

2005-04-05

2005-04-05

Griffin, Walter D. (Department: 1764)

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

C208S063000, C208S064000, C585S323000, C585S911000, C585S912000

Reexamination Certificate

active

06875338

ABSTRACT:
The invention concerns a process for converting hydrocarbons using at least one globally endothermic chemical reaction, in which a hydrocarbon feed successively traverses at least two reaction zones each containing at least one solid catalyst and comprising between said reaction zones an intermediate step, in a non catalytic zone, for reheating the stream (ST) from the first of the two reaction zones prior to its introduction into said second reaction zone, and in which said reheating is carried out in a heat exchanger, with heat transfer essentially by convection using a thermal fluid TF with a coking sensitivity index CS that is less than that of the stream ST, the difference in temperature ΔT between the temperature of the fluid TF at the inlet to the exchanger and the temperature of the stream ST at the heat exchanger outlet being less than 250° C. The invention also concerns the use of said process for converting hydrocarbons and a unit for carrying out the process.

REFERENCES:
patent: 2271646 (1942-02-01), Kassel
patent: 3326996 (1967-06-01), Henry et al.
patent: 5885439 (1999-03-01), Glover

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