Method of making titanium dioxide

Claim 1

THE PROCESS FOR PRODUCING TITANIUM DIOXIDE WHICH COMPRISED FORMING AN INTIMATE MIXTURE OF FINELY GROUND TITANIFEROUS MATERIAL AND SPENT SODA BASE PULPING LIQUOR AND CARBONIZING THE MIXTURE, LEACHING SAID CARBONIZED MATERIAL WITH WATER TO REMOVE SODA BASE PULPING CHEMICALS AND TO INCREASE THE POROSITY OF SAID CARBONIZED MATERIAL AND UTILIZING SAID CHEMICALS TO REGENERATE FRESH COOKING LIQUOR, REACTING THE RESULTANT LEACHED CARBONIZED MATERIAL WITH CHLORINE HEATED TO TEACTION TEMPERATURE TO FORM VOLATILE TITANIUM AND IRON CHLORIDES, REACTING THE RESULTANT GASES WITH A SLURRY CONTAINING A BASIC OXYGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE, CALCIUM HYDROXIDE, MAGNESIUM OXIDE AND MAGNESIUM HYDROXIDE, TO CONVERT SAID TATANIUM AND IRON CHLORIDES INTO BASIC HYDRATED OXYGEN PRECIPITATES, SEPARATING SAID TITANIUM AND IRON PRECIPITATES FROM THE SOLUBLE PROUCTS, REACTING SAID PRECIPITATES FROM SULFUR DIOXIDE TO CONVERT THE IRON PRESENT INTO WATER SOLUBLE COMPOUNDS, RE MOVING SAID IRON COMPOUNDS AND CONVERTING SAID TITANIUM PRECIPITATE INTO TITANIUM DIOXIDE.