Process for the production of carbon black from at least one FCC slurry cut, comprising a specific hydrotreatment

A process for the production of carbon black with a sulphur content of less than 0.3% starting from at least one feed which is a slurry cut obtained from a catalytic cracking unit (FCC or RFCC), the process involving the following steps:

• a step (FILT) for filtering fine solid particles contained in the slurry cut, resulting in a clarified slurry cut, containing less than 300 ppm fine particles;
• a step (RDS) for hydrotreatment of the clarified slurry cut, operating under the following conditions:
• a) a pressure in the range 50 to 200 bars;
• b) a temperature in the range 300° C. to 420° C.;
• c) a HSV in the range 0.1 to 2.5 h−1;
• the catalyst used being a succession of at least two distinct hydrotreatment catalysts, and said hydrotreatment step producing an effluent with a BMCI value of more than 110;
• a step (DIST) for distillation of the effluent from the hydrotreatment step, resulting in a “light” portion used as a cut in a fuel pool, and a distillation residue with a sulphur content of less than 0.3%, and having a BMCI of more than 80, and with a density of more than 0.97 g·m−3, said distillation residue being introduced into a carbon black unit (CBU),
• a step (CBU) for producing carbon black in the unit, which results in a final product with a specifications in accordance with at least one of the ASTM standards N110, N220, N300, N330, N550, N683, N770, N880, N990.