| abstract |
A process for the production of light olefins by means of the steam cracking reaction of liquid hydrocarbon feeds, preferably selected from naphtha, kerosene, atmospheric gas oil, vacuum gas oil and oil residues, alone or mixed with each other, in the presence of a suitable catalyst, effected at a reaction temperature ranging from 700 to 850 °C, at a pressure ranging from 1.1 to 4.5 absolute Atm and for a contact time ranging from 0.02 to 0.3 sec, preferably from 0.05 to 0.15 sec, in a reactor comprising one or more cylindrical pipes, with the same or different section, consisting of a tubular core and a reaction zone whose transversal section is in the form of a circular crown, the ratio between the area of said circular crown and the circular section ranging from 0.35 to 0.99, preferably from 0.75 to 0.95. |