Gas to olefins processes with coproduction of hydrogen

A process for converting a stream comprising methane into chemicals, said process being characterized in that it comprises the following steps:

• a) providing a first stream comprising methane;
• b) providing a second stream which is a bromine-rich stream;
• c) putting into contact said first stream with said second stream under bromination reaction conditions to obtain a third stream comprising at least unreacted methane, methyl bromide, dibromomethane, and hydrogen bromide;
• d) removing said dibromomethane from said third stream under separation conditions, to produce a dibromomethane stream and a fourth stream comprising unreacted methane, methyl bromide and hydrogen bromide;
• e) converting the fourth stream into chemicals;
• f) separating hydrogen bromide from said third stream and/or said fourth stream, to provide a hydrogen bromide-rich stream;
• wherein the step of separating hydrogen bromide is performed by non-aqueous extraction;
• g) subjecting the hydrogen bromide-rich stream of step (f) to an electrolysis step (g) to produce a hydrogen stream and/or a bromine stream, said bromine stream being optionally reused in step (c).