XYLENE ISOMERISATION PROCESS FOR MIXTURES CONTAINING AROMATIC COMPOUNDS C Russian patent published in 2009 - IPC C07C6/12 C07C15/08 

FIELD: chemistry.

SUBSTANCE: xylene isomer process involves (versions): (a) contacting the raw stock containing aromatic compounds C₉ with the catalyst containing unsulphurised mordenite impregnated with metal oxide of group VIB to produce the intermediate flow containing xylene isomers; (b) separating, at least, parts of xylene isomers from the intermediate flow and (c) delivering the intermediate flow back to the raw stock from the stage (a) that have been impoverished with xylene isomers prepared at the stage (b). There is also disclosed invention concerning versions of xylene isomerisation process for the raw stock containing aromatic compounds C₉.

EFFECT: application of specified process ensures high conversion of aromatic compounds C₉ and methylethylbenzol, and also to high ratios of xylene isomers to ethylbenzol, xylene isomers to aromatic compounds C₉, xylene isomers to aromatic compounds C₁₀, trimethylbenzol to methylethylbenzol, benzol to ethylbenzol in conversion products.

15 cl, 3 dwg, 6 tbl, 5 ex