Process for recovering boric acid

The process for recovering boric acid from an acidic sodium borate-mineral acid reaction product mixture which comprises extracting said product mixture with a monohydric alcohol-diluent solution at a temperature of about 50.degree. to 80.degree. C., stripping the alcohol-diluent solution with recycled hot dilute boric acid solution, cooling to crystallize said boric acid, and recovering said boric acid from said cooled solution, in which said monohydric alcohol is an aliphatic alcohol containing 6 to about 12 carbon atoms and said diluent is selected from C.sub.12-17 hydrocarbons, C.sub.9-11 alcohols and water-immiscible glycol ethers of the formula XO(CH.sub.2).sub.n OY wherein n is 2 or 3 and X and Y are each selected from hydrogen, lower alkyl and monocyclic aryl.