Pre-alloyed powder
AssigneeH. C. Starck GmbH
InventorsBernd Mende, Gerhard Gille, Benno Gries, Peter Aulich, Jörg Münchow
Life of this patent
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Abstract
A process is described for the production of metal powder and alloy powders containing at least one of the metals iron, copper, tin, cobalt or nickel, by mixing aqueous metal salt solutions with an aqueous carboxylic acid solution, separating the precipitation product from the mother liquor and reducing the precipitation product to the metal.
Claims8
A process for producing a metal powder or an alloy powder containing at least one metal selected from the group consisting of iron, copper, tin, cobalt and nickel, comprising:
- mixing an aqueous metal salt solution with a saturated aqueous carboxylic acid solution in a mother liquor and forming a precipitation product;
- separating the precipitation product from the mother liquor;
- and
- reducing the precipitation product to the metal or alloy powder,
- wherein the aqueous carboxylic acid solution contains solid carboxylic acid in a quantity sufficient that the mother liquor, after precipitation has finished, is still at least 10% saturated, based on an aqueous solution free of metal salt.
A process for producing a metal powder or an alloy powder containing at least one metal selected from the group consisting of iron, copper, tin, cobalt and nickel, comprising:
- mixing an aqueous metal salt solution with a saturated aqueous carboxylic acid solution in a mother liquor and forming a precipitation product;
- separating the precipitation product from the mother liquor;
- and
- reducing the precipitation product to the metal or alloy powder,
- wherein the aqueous carboxylic acid solution contains solid carboxylic acid in a quantity sufficient that the mother liquor, after precipitation has finished, is more than 20% saturated, based on an aqueous solution free of metal salt.
A process for producing a metal powder or an alloy powder containing at least one metal selected from the group consisting of iron, copper, tin, cobalt and nickel, comprising:
- mixing an aqueous metal salt solution with a saturated aqueous carboxylic acid solution in a mother liquor and forming a precipitation product;
- separating the precipitation product from the mother liquor;
- and
- reducing the precipitation product to the metal or alloy powder,
- wherein the aqueous carboxylic acid solution contains solid carboxylic acid in a quantity sufficient that the mother liquor, after precipitation has finished, is more than 25% saturated, based on an aqueous solution free of metal salt.
Dependencies are inferred from the claim text.