Process for the steam-cracking of heavy feedstocks

Details Process for the steam-cracking of heavy feedstocks Process for the steam-cracking of heavy feedstocks

1978-02-10

1979-12-25

Crasanakis, George

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 89, C10G 3700

Patent

active

041804538

ABSTRACT:
A fresh charge containing aromatic hydrocarbons is hydrotreated in admixture with a recycle fraction, in the presence of a bifunctional catalyst, a portion of the effluent is subjected to steam-cracking, thereby recovering a gas oil fraction which is subjected to hydrogenation and forms said recycle fraction. The mixture of recycle fraction and charge is advantageously treated with hydrogen in the presence of a monofunctional catalyst to hydrogenate olefins, at a lower temperature than the hydrotreatment, and then passed to the hydrotreatment zone.

REFERENCES:
patent: 3394199 (1968-07-01), Eng et al.
patent: 3511771 (1970-05-01), Hamner
patent: 3781195 (1973-12-01), Davis et al.
patent: 3827969 (1974-08-01), Wilson et al.
patent: 3898299 (1975-08-01), Jones
patent: 4061562 (1977-12-01), McKinney et al.
patent: 4065379 (1977-12-01), Soonawala et al.

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