SYNTHESIS OF AROMATIC COMPOUNDS FROM METHANE Russian patent published in 2012 - IPC C07C2/84 C07C15/04 

FIELD: chemistry.

SUBSTANCE: described is a method of converting methane to aromatic hydrocarbons, in which starting material containing methane is brought a) into contact with a dehydrocyclisation catalyst in a reaction zone in conditions which include a first maximum temperature sufficient for converting methane to aromatic hydrocarbons and forming coke on the catalyst. A portion of the coked catalyst is moved from the reaction zone into b) a separate regeneration zone where that portion of the catalyst is brought into contact with a regeneration gas in conditions which include a second maximum temperature which is lower than or equal to the first maximum temperature and is sufficient for at least partial removal of coke from that portion of the catalyst. Before returning into the reaction zone, the regenerated portion of the catalyst is brought c) into contact with coking gas in a catalyst treatment zone separate from the reaction zone at a third maximum temperature which is lower than the first maximum temperature. The dehydrocyclisation catalyst contains a metal which, during contacting (a), is at least partially contained in elementary form or in form of carbide materials, where contacting (b) at least partially converts said metal into oxide form, and contacting (c) at least partially returns the metal to elementary or carbide form.

EFFECT: method enables efficient catalyst regeneration.

10 cl, 3 ex, 3 tbl, 1 dwg