TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The reduction of the methane takes place by separating 2-4C-alkane from the methane containing gas mixture by sorption-, and subsequent desorption- process. The gas mixture is brought by continuous adsorption with at least a sorbent. The process (c) takes place by dehydrating aromatization of optionally saturated hydrocarbon under oxidative conditions, to obtain ethylene, preferably ethyl benzene. The process further comprises separating the mixture (D) into a low boiler mixture (E) essentially containing obtained hydrogen and unconverted hydrocarbons, preferably 1C/2C mixture (Ea), and at least a high boiler mixture (F) essentially containing unsaturated hydrocarbons, preferably 1C/2C mixture (Fa). The separating process takes place by distillation. Preferred Components: The methane containing gas is natural gas. The amount of methane before enriching is at least 50 vol.%. The organometallic skeleton material is an acid from isophthalic acid, terephthalic acid, 2,5-dihydroxyterephthalic acid, 1,2,3-benzene tricarboxylic acid, 1,3,5-benzene tricarboxylic acid, 2,2'-bipyridine-5,5'-dicarboxylic acid, 1,4-naphthalene dicarboxylic acid, 1,5-naphthalene dicarboxylic acid or 2,6-naphthalene dicarboxylic acid; or a metal ion such as Zn2+, Al3+, Co2+, Co3+, Fe3+ or Cu2+. EXAMPLE - High caloric natural gas (containing methane (85.8%), ethane (8.76%), propane (1.58%), butane (0.31%), pentane (0.04%), hexane (2.17%), carbon dioxide (2.17%) and nitrogen (1.31%)) was introduced over an adsorber with copper-benzene tricarboxylic acid-metal organic framework (416 g) at 5degreesC and 8 bar. Subsequently carbon dioxide, ethane and higher hydrocarbons were removed to obtain a methane enriched gas mixture, and ethane enriched by-product was adsorbed on the adsorption agent. Molybdneum/H-ZSM-5 catalyst was impregnated in an aqueous solution of ammoniumheptamolybdate, dried and calcinated at 500degreesC. Further helium (5 vol.%) and ethane rich hydrocarbon mixture (containing ethane (26%), propane (4%) and remaining methane) (95 vol.%) were added, heated and dehydrated aromatized under the catalyst at 700degreesC to obtain a product stream containing benzene (1.75 vol.%).