Method of impregnating the wooden structure of cooling towers to preserve the same

Claim 1

IN A METHOD OF TREATING THE WOODEN STRUCTURE OF COOLING TOWERS BY IMPREGNATION WITH A WOOD PRESERVATIVE SUBSEQUENTLY TO FABRICATION THEREOF, THE IMPROVED STEPS OF COMPLETELY SATURATING THE WOODEN STRUCTURE OF THE COOLING TOWER TO BE TREATED WITH WOOD PRESERVATIVE, WITH WATER AND WHILE THE TOWER IS IN A FABRICATED CONDITION; CONFINING A QUANTITY OF WATER SUFFICIENT ONLY TO SUBSTANTIALLY COVER AND PROVIDE A LAYER OF WATER OVER THE ENTIRE OUTER SURFACE OF THE WOODEN STRUCTURE OF THE COOLING TOWER TO BE TREATED WITH SAID WOOD PRESERVATIVE; ADDING PREDETERMINED AMOUNTS OF NORMALLY SUBSTANTIALLY WATER SOLUBLE PESERVATIE INGREDIENTS TO SAID QUANTITY OF WATER TO PRODUCE A TREATING COMPOSITION AND INCLUDING A METALLIC SULFATE, A METALLIC DICHROMATE, AN ARSENIC COMPOUND AND A COMPONENT HAVING A FLUORIDE RADICAL, ALL OF SAID INREDIENTS BEING AT LEAST PARTIALLY DISSOLVED IN SAID QUANTITY OF WATER AND PRESENT IN AMOUNTS TO EFFECT IMPREGNATION OF SAID WOODEN STRUCTURE TO BE TREATED, WITH SUFFICIENT ACTIVE INGREDIENTS TO PRESERVE THE WOOD FOR AN EXTENDED PERIOD OF TIME, SAID INGREDIENTS BEING CAPABLE OF REACTING ABOVE A PH OF APPROXIMATELY 3.5 TO FORM A WATER INSOLUBLE WOOD PRESERVATIVE; APPLYING THE TREATING COMPOSITION TO ALL OF THE OUTER SURFACES OF SAID WOODEN STRUCTURE TO BE TREATED WITH THE WOOD PRESERVATIVE APPLYING WATER TO SAID OUTER SURFACES OF THE WOODEN STRUCTURE UNDERGOING TREATMENT AND WHILE THE TREATING COMPOSITION IS THEREON, ONLY SUFFICIENT WATER BEING APPLIED TO MAINTAIN THE SURFACES OF THE WOODEN STRUCTURE IN A MOIST CONDITION WITH MINIMUM RUNOFF, AND UNTIL THE INGREDIENT HAVE DIFFUSED INTO THE WATER SATURATED WOODEN STRUCTURE; MAINTAINING THE PROPORTION OF THE TREATING SOLUTION ON THE OUTER SURFACE OF SAID WATER SATURATED WOODEN STRUCTURE AT A PH BELOW 3.5 UNTIL SUBSTANTIALLY SAID AMOUNTS OF THE INGREDIENTS HAVE PENETRATED INTO THE WOODEN STRUCTURE; AND THEN RAISING THE PH OF THE COMPOSITION IN SAID WATER SATURATED WOODEN STRUCTURE TO A LEVEL ABOVE 3.5 BY PASSING AN ALKALI NEUTRALIZING AGENT OVER SAID WOODEN STRUCTURE TO THEREBY CAUSE THE INGREDIENTS TO REACT AND FORM INSOLUBLE PRECIPITATES WITHIN THE WOODEN STRUCTURE.