1. A PROCESS FOR PURIFYING LIQUID CHARACTERIZED BY BEING AT LEAST RELATIVELY INERT TO THE COMPOSITED MIXTURE HEREINAFTER RECITED, OF A TYPE THAT DOES NOT TEND TO CAUSE DECOMPOSITION OF SAID COMPOSITED MIXTURE, FLUID ENOUGH TO FLOW ABOUT SAID COMPOSITED MIXTURE WHEN AT A TEMPERATURE IN THE FOLLOWING RECITED TEMPERATURE RANGE, AND CONTAINING AT LEAST ONE IMPURITY SELECTED FROM THE GROUP CONSISTING OF SULFUR COMPOUNDS AND CHLORINE COMPOUNDS, WHICH COMPRISES CONTACTING SAID LIQUID IN A TEMPERATURE RANGE FROM ABOUT -35 TO ABOUT 150* CENTIGRADE WITH A COMPOSITED MIXTURE CONSISTING ESSENTIALLY OF (1) MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILVER NITRATE, SILVER FLUORIDE, SILVER TETRAFLUOROBORATE, SILVER HEXAFLUOROSILICATE, SILVER HEXAFLUOROPHOSPHATE, SILVER HEXAFLUOROANTIMONATE AND SILVER-SILVER OXIDE MIXTURE AND (2) BASIC ALUMINA, THE ACID EQUIVALENCY OF WHICH IS IN THE RANGE FROM ABOUT 8X10-8 TO ABOUT 5X10-5% OF H2SO4.