Methane (CH4) is reacted with chlorine (Cl2) to produce methyl chloride (CH3Cl). Methyl chloride can then react with ammonia (NH3) to form methylammonium chloride ((CH3NH3)Cl). Finally, methylammonium chloride can react with sulfuric acid (H2SO4) to produce methylammonium sulfate ((CH3NH3)2SO4).