Process for preparing metal nitrates from the corr

专利名称：Process for preparing metal nitrates from

the corresponding metals

发明人：Thomas E. Nappier,Alex T. Magdics申请号：US09726067申请日：20001129

公开号：US20020122763A1公开日：20020905

摘要：The invention relates to a process for preparing metal nitrates from thecorresponding metal wherein the metal is selected from silver, cadmium, bismuth and themetals of atomic number 24-30. The process comprises (A) providing a reactor containing(a) the metal, (b) nitric acid, and (c) water wherein the initial concentration of the nitric acidin the water in the reactor is from about 50% to about 80% by weight, and the reactor isfree of (1) added fuming nitric acid, (2) added chromium compounds when the metal isiron, and (3) added oxygen, and when the metal is nickel the reactor contains less than500 g/l of any added nickel nitrate hexahydrate, and (B) maintaining the temperaturewithin the reactor at a temperature to facilitate the formation of the metal nitrate and tomaintain the produced metal nitrate in the molten state; (C) maintaining the pressurewithin the reactor at between atmospheric pressure up to about 100 psig; and (D)recovering the metal nitrate from the reactor, provided that when the metal is iron, anyrecovered iron nitrate is not recycled. The process of the present Invention results in theformation of metal nitrates and more particularly aqueous solutions of metal nitratescontaining reduced amounts of ammonium nitrate.

申请人：NAPPIER THOMAS E.,MAGDICS ALEX T.

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