Manufacture of ammonium fluoborate

Claim 1

IN A PROCESS FOR PRODUCING AMMONIUM FLUOBORATE, THE STEPS OF: ESTABLISHING A FLUOBORIC ACID SOLUTION WHICH ALSO CONTAINS FLUOSILICIC AND BORIC ACIDS AND IN WHICH THE AMOUNT OF FLUOBORIC ACID IS NOT MORE THAN ABOUT 85% OF THE TOLTAL OF FLUOBORIC AND FLUOSILICIC ACIDS, TREATING SAID SOLUTION WITH AMMONIA, WHEREBY THE PH OF THE SOLUTION IS PROGRESSIVELY RAISED, A FIRST PORTION OF SAID AMMONUA TREATMENT BEING PROFORMED WITH THE SOLUTION AT AN ELEVATED TEMPARATURE OF AT LEAST ABOUT 70% C., COOLING THE SOLUTION TO A TEMPERATURE NOT HIGHER THAN ABOUT40* C. AFTER THE AMMONIA TREATMENT HAS BROUGHT THE SOLUTION TOUYI A PH OF ABOUT 4 AND WHILE THE SOLUTION REMAINS AT A PH SUBSTANTIALLY BELOW NEUTRALITY, CONTINUING THE AMMONIA TREATMENT OF THE SOLUTION WHILE PREVENTING RISE OF TEMPERATURE OF THE SOLUTION AND UNTIL THE SOLUTION REACHES A PH OF AT LEASTABOUT 8, TO EFFECTUATE PRECIPITATION OF SILICA WHILE INHABITING LOSS OF AMMONIA, THEREAFTER SEPARATING SILICA FROM THE SOLUTION AND SUBJECTING THE SOLUTIOH TO EVAPORATION, TO PRODUCE SUBSTANTIALLY PURE AMMONIUM FLUOBORATE.