High pressure reaction vessel

Claim 1

IN COMBNATION WITH A HIGH PRESSURE REACTION VESSEL ADAPTED FOR THE LIQUID PHASE REACTION OF HYDROCARBONS AND HYDROGEN UNDER PRESSURES IN EXCESS OF 1000 P.S.I.G. AND ATTEMPERATURES IN EXCESS OF 750*F. WHEREIN THE REACTION TAKES PLACE IN THE PRESENCE OF CONTACT PARTICLES AND WHERIN THE REACTION VESSEL HAS MEANS TO INTRODUCE REACTANTS THERETO AND MEANS TO WITHDRAW LIQUID EFFLUENT THEREFROM, THE IMPROVEMENT WHICH COMPRISES AN INTERNAL, EXTERNALLY CONTROLLABLE, POSITIVE FLOW, RECYCLE CIRCUIT INCLUDING A SUBSTANTIALLY VERTICAL CONDUIT EXTENDING FROM AN UPPER PART OF THE REACTION VESSEL TO A LOWER PART THEREOF, A PUMP IN THE LOWER PART OF THE REACTION VESSEL, SAID PUMP HAVING A TELESCOPING INLET MEMBER WHICH ENGAGES THE LOWER END OF THE VERTICAL CONDUIT, SAID PUMP HAVING A CASING, AN IMPELLER IN SAID CASING, SAID CASING HAVING A PLURALITY OF OUTLET PORTS WHICH CONVERT THE LIQUID VELOCITY FROM SAID IMPELLER INTO A PRESSURE SUFFICIENT TO OVERCOME THE HEAD ON THE OUTLET PORTS AND FORCE THE LIQUID IN A RECYCLE PATH THROGH LIQUID AND CONTACT PARTICLES IN THE REACTION VESSEL TO THE UPPER PART OF THE REACTION VESSEL, AND PUMP DRIVER INTEGRATED TO SAID PUMP, SAID PUMP AND DRIVER BEING DEMOUNTABLY MOUNTED WITHIN AND TO THE LOWER PART OF THE REACTION VESSEL, SAID PUMP DRIVER HAVING EXTERNAL MEANS, INDEPENDENT OF THE REACTANTS IN THE REACTION VESSEL, FOR CONTROLLABLY DRIVING SAID PUMP.