TH31382B - Method for dissolving precious metal substances - Google Patents

Abstract

DC60 (18/12/41) This fabrication process includes the leaching of metal-containing materials with inorganic acids, such as sludge containing precious metals with fluoride. While there are substances that cause substances A complex that allows fluoride ion to be a complex. This process of invention made Separation of precious metals of fluoride and valuable radionuclides from available input materials High mineral content containing metals and radionuclides in the form of fluoride classified as insoluble, or confined within a metal-fluorine-containing matrix that is considered insoluble in the ingress system. react general chemistry The process of invention includes sacrificing metal-containing materials with inorganic acids, such as slag, containing precious metals with fluoride in the presence of reagents. A complex that allows fluoride ion to be a complex. This process of invention made Separation of precious metals of fluoride and valuable radionuclides from available input materials High mineral content containing metals and radionuclides in the form of fluoride classified as insoluble, or confined within a metal-fluorine-containing matrix that is considered insoluble in the ingress system. react general chemistry

Claims (3)

1. A process for dissolving precious substances of tantalum and / or niobium from materials. Containing metal Containing valuable substances of tantalum and / or niobium with fluoride added. Contact of metal-containing materials with inorganic acids and complexing agents, which can form ions that form aluminum complexes, silicon, titenium, or their mixtures. In order to form a solution Digesting materials containing metals In suitable temperature and pressure conditions; Dissolving at least part of the valuable substances of the tantalum and / or niobium added. Fluoride already In order to form fluorine ions And precious substances of tantalum and / or niobium metals and combine to form substances containing various elements containing Fluorine ions and ions that form complexes; And separation of precious substances of tantalum metal And / or niobium from solution 2. Process of claim 1 in which the material contains Acids and complexing agents are suspended in water at a range of 5 to 40% solids and this digestion agent is stirred. At a rate sufficient to maintain the condition of all classified solids in suspension form 3. Process of claim 1, where the disintegration is subjected The temperature was maintained at 40 to 110 ° C for a period of 0.25 h to 4.0 h. 4. Process of claim 1 in which inorganic acid consisted of nitric acid (NHO3), sulfuric acid (H2SO4), saline acid. (HCl) and / or a mixture of these acids. 5. Process of claim 1 in which the complexes It consists primarily of aluminum, silicon and / or a mixture of these substances. 6. Process of claim 5 in which the amount of the complexing substance used is Quantity in such a way that the molar quantity of the complexing agent is related to the molar quantity. Of the starting material according to the following formula Moles of the complexing agent = 0.2 to 1.5 moles of fluoride in the starting material. 7. Process of claim 6 in which the amount of acid used is Quantity in a way that quantity Of hydrogen ions obtained from the acid enough to react with the oxygen included in the system after The addition of complexes 8. Process of claim 7, which uses 0.1 lb. to 2.0 lb. of acid per pound of dry starting material. 9. Process for dissolving valuable tantalum metal. And / or niobium from materials containing metals Containing Precious substances of tantalum and / or niobium with fluoride added. This process consists of Solution formation by touching materials containing metals With acidic aqueous solutions Inorganic and complexing agents This can cause ions to form aluminum complexes, silicon, titenium, or mixtures of them in the amount of 0.1 lb to 2.0 lb of inorganic acids per pound. Of materials that contain metals In such a way that the amount of hydrogen ions given to The systems obtained from inorganic acids are sufficient to react with oxygen. That was released from the degradation of Complex reagents Slurry digestion at 40 to 110 ° C at ambient pressure. For a period of 0.25 to 4.0 hours at the solid content range of 5 to 40% for the digestion of metal-containing materials. Dissolving at least part of the valuable substances of tantalum metal. And / or niobium with fluoride added to form fluorine ions. And precious substances of tantalum metal Or niobium; Gathered into substances containing various elements that consist of Fluorine ion And the ions that do Resulting in complex substances and; Separation of precious substances of tantalum metal And / or Niobium from solution 1 0. Process of claim 9 in which materials containing metals The acids and the complexing agents are combined at a sufficient rate to maintain all classified solids. Into suspension form 1 1. Process of claim 9 in which inorganic acids are composed of nitric acid (HNO3), sulfuric acid (H2SO4), hydrochloric acid (HCI) and / or a mixture of these acids 1. 2. Process of claim 9 in which the complexing substance It is mainly composed of aluminum, silicon and / or a mixture of these substances. 3. Process of claim 12 in which the amount of the complexing substance used is Quantity in such a way that the molar quantity of the complexing agent is related to the molar quantity. Of starting material According to the following formula; Moles of the complexing agent = 0.2 to 1.5 moles of fluoride in the starting material.