Unit for producing and separating aromatics with recovery of an extract and/or raffinate from a liquid-liquid extraction process

A device for producing and separating aromatic compounds comprising:

• a catalytic reforming unit (13) suitable for:
• treating a first feedstock comprising naphthas (39) in the presence of a reforming catalyst;
• and producing at least one reforming effluent (40) comprising hydrocarbon compounds having 6 to 10 carbon atoms,
• a feedstock separation unit (1) suitable for:
• separating the reforming effluent (40) into at least one hydrocarbon cut comprising compounds having 6 or 7 carbon atoms (16) and an aromatic cut containing 8 or more carbon atoms (17),
• a liquid-liquid extraction unit (14) suitable for:
• extracting aromatics from a second hydrocarbon feedstock (41) comprising aromatic compounds;
• and producing a first extract (42) and a first raffinate (43),
• a fractionation train (5-6-7) suitable for:
• at least partially fractionating the first extract (42) and the hydrocarbon cut comprising compounds containing 6 or 7 carbon atoms (16), in a benzene-toluene fractionation device (5);
• fractionating the aromatic cut containing 8 or more carbon atoms (17), in a xylene column (6);
• and producing at least one cut comprising benzene (22), one cut comprising toluene (23), one cut comprising xylenes and ethylbenzene (24), and one cut comprising aromatics containing 9 and 10 carbon atoms,
• a xylenes separation unit (10) suitable for:
• separating the cut comprising xylenes and ethylbenzene (24);
• and producing a second extract (31) comprising para-xylene and a second raffinate (32) comprising ortho-xylene, meta-xylene, and ethylbenzene, and
• an isomerization unit (11) suitable for:
• isomerizing the second raffinate (32) and producing an isomerate (34) enriched in para-xylene which is sent to the xylene column (6).