Method of depositing metals on siliceous supports

Claim 1

THE METHOD OF DEPOSITING A METAL COMPONENT PREFENTIALLY ON THE SILICA PORTION OF A POROUS SOLID SILICA-CONTAINING MIXED-OXIDES CARRIER COMPOSED OF SILICA AND AT LEAST ONE OTHER REFRACTORY OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINA, TITANIA, AIRCONIA, AND MAGNESIA, IN A FORM MORE TIGHTLY BOUND TO THE CARRIER THAN IMPREGNATED METAL, WHICH METHOD COMPRISES CONTACTING PARTICLES OF SAID CARRIER WITH A DILUTE SOLUTION OF AN AMMINE COMPLEX OF AN ACIDIC SALT OF THE METAL, LESS THAN ONE MOLAR WITH RESPECT TO METAL CONTENT, IN CONCENTRATED AQUEOUS AMMONIA AT A TEMPERATURE NEAR ATMOSPHERIC AVOIDING AMMONIA VAPORIZATION, FOR AT LEAST TWO HOURS UNTIL SAID CARRIER HAS CHEMISORBED THE MAXIMUM POSSIBLE AMOUNT OF SAID METAL FROM SAID SOLUTION, UP TO THE CHEMISORPTION CAPACITY OF THE CARRIER, SEPARATING SAID PARTICLES FROM CONTACT WITH SAID SOLUTION, AND THEREAFTER DRYING AND CALCINING THE PARTICLES.

Claim 2

THE METHOD OF DEPOSITING A METAL COMPONENT PREFENTIALLY ON THE SILICA PORTION OF A POROUS SOLID SILICA-CONTAINING MIXED-OXIDES CARRIER COMPOSED OF SILICA AND AT LEAST ONE OTHER REFRACTORY OXIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINA, TITANIA, AIRCONIA, AND MAGNESIA, IN A FORM MORE TIGHTLY BOUND TO THE CARRIER THAN IMPREGNATED METAL, WHICH METHOD COMPRISES CONTACTING PARTICLES OF SAID CARRIER WITH A DILUTE SOLUTION OF AN AMMINE COMPLEX OF AN ACIDIC SALT OF THE METAL, LESS THAN ONE MOLAR WITH RESPECT TO METAL CONTENT, IN CONCENTRATED AQUEOUS AMMONIA AT A TEMPERATURE NEAR ATMOSPHERIC AVOIDING AMMONIA VAPORIZATION, FOR AT LEAST TWO HOURS UNTIL SAID CARRIER HAS CHEMISORBED THE MAXIMUM POSSIBLE AMOUNT OF SAID METAL FROM SAID SOLUTION, UP TO THE CHEMISORPTION CAPACITY OF THE CARRIER, SEPARATING SAID PARTICLES FROM CONTACT WITH SAID SOLUTION, AND THEREAFTER DRYING AND CALCINING THE PARTICLES.