Integrated staging hydroprocessing reaction vessel

An integrated staging hydro-processing reaction vessel (100, 200) for hydro-processing a low boiling vapour hydrocarbon stream which acts as a primary stream and a heavy boiling liquid hydrocarbon stream which acts as a secondary stream, wherein the vessel (100, 200) comprises:

• a top portion or a non reacting zone acting as a stabilizer section (107, 229) with a disengaging space consisting of a demister (106, 228) to prevent liquid entrainment at a top part of the stabilizer section (107, 229);
• a middle portion or a reaction zone acting as a reactor section (108, 230) consisting of a hydro-processing catalyst bed (111, 233) in a middle part of the reactor section (108, 230), a liquid phase distributor (110, 232) located at a top part of the reactor section (108, 230), and a vapour phase distributor (114, 234) located at a bottom part of the reactor section (108, 230), wherein the secondary stream (103, 223) of heavy boiling hydrocarbons enters the top part of the reaction zone through the liquid phase distributor (110, 232), and the primary stream (101, 221) along with a hydrogen rich treat gas stream (117, 240) enters the bottom part of the reaction zone and get distributed through the vapour phase distributor (114, 234), wherein a volumetric ratio of hydrogen to the primary stream is in the range of 0.5 to 10 Nm3/m3;
• a bottom portion or a non reacting zone acting as a separator section (109, 231) integrated with a liquid seal mechanism (115, 235) containing an inverted outer pipe (118, 241), wherein the inverted outer pipe (118, 241) has a seal at a top part and a perforated opening (120, 243) at a bottom part thereof, and an inner annular pipe (119, 242) having an externally protruded part (116, 236) extending out from the separator section (109, 231);
• and
• wherein in the reactor section (108, 230), the reaction between sulphur compounds of the primary stream (101, 221) and the olefins of the secondary stream (103, 223) results in formation of heavy boiling sulphur compounds in liquid state and heteroatom lean low boiling stream (102, 222), wherein the heavy boiling sulphur compounds are in liquid-phase and taken out from the reaction vessel through an outgoing secondary stream (104, 224) and the heteroatom lean low boiling stream (102, 222) is withdrawn from a topmost section of reaction vessel (100).