US4102981A - Removal of acidic impurity from ...
Acidic impurity, such as HCl, is removed from chlorofluoromethanes of the formula CHCl n F 3-n, where n is 1 or 2, by scrubbing the contaminated fluorocarbon with an aqueous solution made from a mixture of trisodium phosphate and sodium hydroxide. Use of this solution as scrubbing medium allows purification of the contaminated fluorocarbon without appreciable decomposition and also without ...