MIXTURE OF SOLVENTS AND COSMETIC PRODUCT CONTAINING SUCH MIXTURE.

摘要

A PROCESS IS PRESENTED TO PRODUCE FLUORIDIC ACID FROM SIF6 2OCESO IS CARRIED OUT: I) COMBINING (NH4) 2 SO4, (II) OF A PH SUFFICIENTLY HIGH FOR THE SULPHATE TO BE IN ITS DIVALENT STATE, WITH SIF6 2 UALS (I) IN A QUANTITY THAT EXCEEDS THE ESTIMI METALLICALLY REQUIRED TO FORM (NH4) 2 SIF 6 AS FOLLOWS: (NH4) 2SO4 + SIFE 2 HAVE (NH4) 2SIF6 AND EXCEED (NH4) 2 SO4 (II) TO PRECIPITATE AND SEPARATE (NH4) 2 SIF 6 OF GREAT PURITY ALLI (VIII); III) SOLVING THE (NH4) 2SIF 6 (XII) TO REACT WITH NH 4 OH TO FORM LIQUOR OF NH 4 F (XIV) AND IF (OH) 4 (XV) PRECIPITATED; IV) SEPARATING THE NH 4F (XIV) LIQUOR FROM THE PRECIPITATED SI (OH) 4 (XVI); V) HAVING TO REACT NH 4 F WITH WATER TO FORM NH 4 F. HF (XVIII) AND AMMONIA GAS; VI) MAKING THE NH 4 F. HF (XVIII) REACT WITH NAF (XIX) TO PRODUCE NAF. HF (XX) PRECIPITATED AND NH 4 F (XXI) AND (XXI) LIQUOR; AND VII) HEATING AND DECOMPOSING THE NAF. HF IS HF (XXI-II) AND NAF (XXII).