SYNTHESIS OF AROMATIC HYDROCARBONS FROM METHANE Russian patent published in 2011 - IPC C07C2/76 C07C1/04 C07C1/12 

FIELD: chemistry.

SUBSTANCE: invention relates to methods for synthesis of aromatic hydrocarbons from methane, particularly from natural gas. Described is a method of converting methane from a stream of natural gas into higher molecular weight hydrocarbons, including aromatic hydrocarbons, involving: (a) bringing starting material containing methane into contact with a dehydrocyclisation catalyst in conditions which are efficient for conversion of said methane into aromatic hydrocarbons and obtaining a first output stream containing aromatic hydrocarbons and hydrogen, where the said first output stream contains at least 5 wt % aromatic rings more than the said starting material; and (b) reacting at least a portion of hydrogen from the said first output stream with carbon dioxide, fed into the process in form of a portion of a stream of natural gas in conditions which are efficient for obtaining a second output stream, having low content of hydrogen compared to the said first output stream; where the reaction (b) involves: (I) (1) reaction of hydrogen with the obtained hydrocarbons and water (2) removal of at least a portion of water from the said second output stream and (3) returning at least a portion of hydrocarbons from the said second output stream into the said contact (a).

EFFECT: converting methane into aromatic hydrocarbons, the methane being contained in a stream of natural gas which contains a large amount of carbon dioxide.

21 cl, 2 ex, 3 dwg