METHOD OF SEPARATING PROPANE AND BUTANE DEHYDROCYCLODIMERIZATION PRODUCTS Russian patent published in 2006 - IPC C07C7/12 C07C15/00 

FIELD: petrochemical processes.

SUBSTANCE: components C₃₊ undergo partial condensation and isolated in at least one vapor-liquid separation zone to produce liquid-phase stream containing C₃- and C₄-hydrocarbons and aromatic hydrocarbons and gas-phase stream containing hydrogen, methane, ethane, and C₃₊-hydrocarbons. Piqued-phase stream is treated to isolate C_4--hydrogenation-dehydrogenation hydrocarbons and concentrate of aromatic hydrocarbons C₆₊. In order to isolate aromatic hydrocarbons from resulting vapor-phase stream, the latter is brought into contact with adsorbent under conditions favoring adsorption of at least a part of aromatic hydrocarbons, while aromatic hydrocarbon-depleted vapor-phase stream is obtained. Regeneration of aromatic hydrocarbon-charged adsorbent is accomplished with flushing gas at elevated temperature, said flushing gas being part of aromatic hydrocarbon-depleted vapor-phase stream while aromatic hydrocarbons trapped by flushing gas are condensed therefrom in vapor-liquid separation stage.

EFFECT: facilitated separation of products.

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