Production of granular water-soluble perborate-containing salt mixtures

Claim 1

A PROCESS FOR THE PRODUCTION OF GRANULAR SALT MIXTURES CONTAINING PERBORATES WHICH COMPRISES MOVING A FINELY DIVIDED WATER-SOLUBLE PERBORATE ON A SUPPORT SURFACE FOR CONTACT BETWEEN THE INDIVIDUAL DIVIDED PARTICLES WHILE SPRAYING THE PERBORATE WITH A THINLY LIQUID DISPERSION OF AN UNDISSOLVED SALT CAPABLE OF CRYSTALLIZING WITH THE INCLUSION OF WATER OF CRYSTALLIZATION IN AN AQUEOUS SOLUTION OF A SALT CAPABLE OF CRYSTALLIZING WITH THE INCLUSION OF WATER OF CRYSTALLIZATION AT A TEMPERATURE ABOVE THE MELTING TEMPERATURE OF THE LOWEST MELTING COMPONENT OF SAID UNDISSOLVED SALT, THE CONTACT OF THE PERBORATE AND DISPERSION BEING EFFECTED AT A TEMPERATURE ALLOWING CRYSTALLIZATION OF THE DISPERSION AND SALT SOLUTION AND AGGLOMERATION BETWEEN INDIVIDUAL DIVIDED PERBORATE PARTICLES, SAID SALT SOLUTION SPRAY CONTAINING AN AMOUNT OF WATER NOT SUBSTANTIALLY IN EXCESS OF THE AMOUNT OF WATER CAPABLE OF BEING BOUND AS WATER OF CRYSTALLIZATION BY THE SALT MIXTURE FORMED, THE QUANTITY OF DISPERSION WHICH IS SPRAYED ONTO THE PERBORATE TO BE GRANULATED BEING IN THE RANGE OF 5-45% BY WEIGHT BASED ON THE GRANULATE TO BE PRODUCED, AND RECOVERING THE GRANULAR AGGLOMERATED PERBORATE PARTICLE SALT MIXTURE FORMED CONTAINING SUBSTANTIALLY ALL OF THE WATER SPRAYED AS WATER OF CRYSTALLIZATION.