Manufacture of saturated halocarbons

Claim 1

THE PROCESS FOR FLUORINATING CCL2=CC62 TO FORM A SATURATED TWO-CARBON-ATOM CHLOROFLUOROCARBON COMPOUND CONSISTING OF CARBON, CHLORINE AND FLUORINE AND HAVING AT LEAST THREE FLUORINE ATOMS, WHICH PROCESS COMPRISES INTRODUCING A GAS PHASE MIXTURE COMPRISING CCL2=CCL2, SUBSTANTIALLY ANHYDROUS HF AND NOT LESS THAN ABOUT 0.5 MOL OF FREE CHLORINE PER MOL OF CCL2=CCL2 INTO A REACTION ZONE CONTAINING SUBSTANTIALLY ANHYDROUS ALUMINUM FLUORIDE CATALYST HAVING CRYSTALLITE SIZE NOT SUBSTANTIALLY GREATER THAN 200 ANGSTROM UNITS RADIUS AND HAVING BEEN DERIVED BY REACTION OF ALUMINUM CHLORIDE AND HF, THE AMOUNT OF HF AND FREE CHLORINE BEING SUFFICIENT TO ULTIMATELY FORM A REACTION PRODUCT CONTAINING A SUBSTANTIAL QUANTIY OF A CHLOROFLUOROCARBON COMPOUND HAVING AT LEAST THREE FLUORINE ATOMS, HEATING SAID MIXTURE IN SAID ZONE AT TEMPERATURE IN THE APPROXIMATE RANGE OF 325* C. TO BELOW 500* C. FOR A TIME SUFFICIENT TO FLUORINATE A SUBSTANTIAL AMOUNT OF SAID CCL2=CCL2 TO FORM A REACTION PRODUCT CONTAINING A SUBSTANTIAL QUANTITY OF A CHLOROFLUOROCARBON COMPOUND CONTAINING AT LEAST THREE FLUORINE ATOMS, DISCHARGING FROM SAID ZONE GASEOUS REACTION PRODUCTS CONTAINING A SUBSTANTIAL QUANTITY OF SAID SATURATED TWO-CARBON-ATOM CHLOROFLUORO CARBON COMPOUND HAVING AT LEAST THREE FLUORINE ATOMS, AND RECOVERING SAID SATURATED COMPOUND HAVING AT LEAST THREE FLUORINE ATOMS.