Method for producing copper-containing hydrogenation catalysts

Claim 1

A PROCESS FO PRODUCING A COPPER-CONTAINING HYDROGENATION CATALYST, WHICH CONSISTS ESSENTIALLY OF REACTING AN AQUEOUS ACIDIC SOLUTION WITH AN AQUEOUS ALKALINE SOLUTION CAPABLE OF REACTING WITH THE ACIDIC SOLUTION TO FORM A COPRRECIPITATE OF THE HEREINAFTER MENTIONED METALS, SAID AQUEOUS ACIDIC SOLUTION CONTAINING COPPER IONS AND IONS OF A SECOND METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, CADMIUM, ALUMINUM, SILICON, TITANIUM, TIN, ZIRCONIUM, VANADIUM, CHROMIUM, MOLYBDENUM, TUNGSTEN, MANGANESE, AG, SC, Y, LA, CE, GA, IN, HF, BE, MG, CA, SR, BA, AND METALS OF GROUP VII OF THE MENDELEEF PERIODIC TABLE, THE MOL RATIO OF SAID SECOND METAL TO COPPER IN SAID ACIDIC SOLUTION BEING BETWEEN 1:100 AND 70:30, SAID ACIDIC AND ALKALINE SOLUTION S BEING ADDED SIMULTANEOUSLY TO AN AQUEOUS THIRD SOLUTION HAVING A PH BETWEEN 7 AND 11 TO FORM A COMBINED PRECIPITATE OF SAID METALS, THE RATE OF ADDING SAID ACIDIC AND ALKALINE SOLUTIONS TO SAID THIRD AQUEOUS SOLUTION BEING SO REGULATED AS TO KEEP THE PH OF THE REACTION MIXTURE BETWEEN X-0.4 AND X+0.5 (WHEREIN X IS FROM 7 TO 11) THROUGHOUT THE ENTIRE DURATION OF THE REACTION, WASHING THE PRECIPITATE WITH WATER TO REMOVE THE ALKALI THEREFROM AND THEN DRYING THE SAME, WHEREBY AN ALKALI-FREE HYDROGENATION CATALYST IS OBTAINED.