Patent ID: 8128806

Claim:
A method of fluid catalytic cracking for production of middle distillates of low aromaticity, characterized in that it comprises the following steps: a) submitting a feed A, consisting of heavy fractions of hydrocarbons, such as a heavy vacuum gas oil, or an atmospheric residue, or a mixture thereof in any proportions, to a reaction of fluid catalytic cracking, in the absence of added hydrogen, in the riser of a dense-bed FCC reactor, operated: (i) at temperatures that vary in the range from 520° C. to 560° C.; (ii) using a cracking catalyst of low activity, of reduced acidity or of basic character; (iii) at a catalyst/oil ratio in the range from 8 to 15, and (iv) with a contact time of the feed A with the cracking catalyst in the range from 30 to 120 seconds; b) withdrawing an effluent B obtained in the above reaction at the top of the dense-bed catalytic cracking reactor, submitting it to fractionation in a fractionating tower that produces a gas fraction C, which is sent to a gas recuperation section, plus a light naphtha fraction D, and a middle distillate E, both of low aromaticity, and sending these for subsequent treatment and sale.