Patent ID: 8021624

Claim:
A reactor for continuously preparing H 2 S by converting a reactant mixture, which comprises essentially gaseous sulfur and hydrogen, over a catalyst, the reactor comprising: a lower part containing a sulfur melt; a feed device adapted to pass gaseous hydrogen into the lower part; a reactant region adapted to contain the reactant mixture; a product region; and at least one U-shaped tube partially disposed within the lower part and placed in contact with the sulfur melt, the at least one U-shaped tube including: a first limb extending into the reactant region and having at least one entry orifice disposed within the reactant region; a second limb extending up to the product region and having at least one exit orifice within the product region; and a flow path connecting the at least one entry orifice to the at least one exit orifice along the U-shaped tube, wherein the catalyst is disposed in a reaction region along the flow path for converting the reactant mixture into a product.