Process for polymerizing tetrafluoroethylene in continuous manner using high energy ionizing radiation
阅读：409发布：2023-03-30
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1. A PROCESS FOR POLYMERIZING TETRAFLUOROETHYLENE WHICH COMPRISES FEEDING MONOMERIC TETRAFLUOROETHYLENE TO A POLYMERIZATION ZONE AND INTO CONTACT WITH PARTICLES OF A SOLID POLYMER CONSISTING OF AT LEAST A PREDOMINANT AMOUNT OF TETRAFLUOROETHYLENE AND NOT MORE THAN A MINOR AMOUNT OF ANOTHER ETHYLENICALLY UNSATURATED FLUOR COMPOUND COPOLYMERIZABLE THEREWITH, SUSPENDED IN WATER; WITHDRAWING FROM SAID POLYMERIZATION ZONE A LIQUID BODY COMPRISING SAID POLYMER SUSPENDED IN WATER, PASSING SAID LIQUID BODY THROUGH A FIELD OF HIGH ENERGY IONIZING RADIATION OF AN INTENSITY OF AT LEAST 40,000 RADS PER HOUR AND SUBJECTING THE POLYMER THEREIN TO IRRADIATION WITH A DOSE EFFECTIVE TO INITIATE POLYMERIZATION OF MONOMERIC TETRAFLUOROETHYLENE UPON CONTACTING SAID MONOMER WITH SAID IRRADIATED POLYMER, PASSING A PORTION OF THE SUSPENSION OF THE IRRADIATED POLYMER TO A FILTERING MEANS AND SEPARATING THE POLYMER FROM THE WATER, PASSING A PORTION OF THE SUSPENSION OF THE IRRADIATED POLYMER INTO AND CONTACTING IT WITH THE MONOMERIC TETRAFLUOROETHYLENE FED TO SAID POLYMERIZATION ZONE, AND CONTINUING THE PROCESS WHILE FEEDING THE MONOMERIC TETRAFLUOROETHYLENE TO SAID POLYMERIZATION ZONE AT A RATE NOT SUBSTANTIALLY GREATER THAN IT IS CONSUMED IN THE POLYMERIZATION REACTION.
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