Patent ID: 7198770
Filing Date: 2007-04-03
Classification: C01G

Abstract:
1. A process for producing Ni(CO) 4 from carbon monoxide and a source of nickel selected from the group consisting of elemental nickel, a nickel compound or mixtures thereof, provided said nickel compound is not nickel chloride per se or in admixture with a nickel carbonate ore, in an amount greater than 50% W/W nickel chloride; which process comprises (a) treating said nickel source with hydrogen at a pressure of at least atmospheric pressure and an effective temperature, in the presence of chloride anion or an in situ generator thereof precursor; to produce a resultant nickel; and (b) reacting said carbon monoxide with said resultant nickel to produce said Ni(CO) 4 wherein said nickel compound is selected from the group consisting of a nickel salt, nickel hydroxide, nickel carbonate and nickel oxide; said chloride anion is present as gaseous hydrochloric acid in gaseous admixture with said hydrogen; and said nickel compound is firstly treated with hydrogen at said effective temperature for a first period of time and subsequently treated with said gaseous admixture for a second period of time, at said effective temperature.