High pressure crystallization apparatus containing a fluid pressure transfer device

Claim 1

AN APPARATUS SUITABLE FOR USE IN A HIGH PRESSURE FRACTIONAL CRYSTALLIZATION OPERATION COMPRISING IN COMBINATION A HIGH PRESSURE FRACTIONAL CRYSTALLIZER, A DISCHARGE CONDUIT FOR THE DISCHARGE OF HIGH PRESSURE SPENT LIQUID FROM SAID CRYSTALLIZER, A BOOSTER PUMP FOR SUPPLYING HIGH PRESSURE FRESH LIQUID TO SAID CRYSTALLIZER AND PRESSURE TRANSFER MEANS CONNECTED AT ONE END IN DIRECT FLUID COMMUNICATION WITH SAID PUMP, FOR SUPPLYING PRESSURIZED FRESH LIQUID TO SAID PUMP, SAID FRESH LIQUID BEING PRESSURIZED BY SAID HIGH PRESSURE SPENT LIQUID FROM SAID DISCHARGE CONDUIT, SAID FLUID TRANSFER MEANS BEING POSITIONED IN DIRECT FLUID FLOW RELATIONSHIP BETWEEN SAID CONDUIT AND SAID PUMP AND COMPRISING AN ELONGATED CYLINDER, END CLOSURES CLOSING THE OPPOSITE ENDS OF SAID CYLINDER AND A PARTITION POSITIONED INTERMEDIATE THE ENDS OF SAID CYLINDER DIVIDING SAID CYLINDER INTO TWO CHAMBERS, EACH OF SAID CLOSURES AND SAID PARTITION BEING PROVIDED WITH AN OPENING THERETHROUGH, A PISTON ROD SLIDEABLY POSITIONED WITHIN EACH OF SAID OPENINGS AND EXTENDING BEYOND THE ENDS OF SAID CYLINDER, TWO PISTON FIXED TO SAID PISTON ROD, ONE OF SAID PISTONS BEING ADAPTED TO OPERATE IN PISTON-CYLINDER RELATIONSHIP WITH SAID CYLINDER WITHIN ONE OF SAID CHAMBERS AND THE OTHER SAID PISTON BEING ADAPTED TO OPERATE IN PISTON-CYLINDER RELATIONSHIP WITH SAID CYLINDER IN THE OTHER OF SAID CHAMBERS, AND MEANS FOR INTRODUCING FLUID INTO SAID CYLINDER AT THE ADJACENT ENDS OF SAID CHAMBER, MEANS FOR THE WITHDRAWAL OF FLUID FROM SAID CYLINDER AT THE ADJACENT END OF SAID CHAMBERS, MEANS FOR THE INTRODUCTION OF FLUID INTO SAID CYLINDER AT THE OPPOSITE ENDS THEREOF AND MEANS FOR DISCHARGING FLUID FROM SAID CYLINDER AT THE OPPOSITE ENDS THEREOF.