Method for separation of chemically pure Os from metal mixtures
AssigneeThe Curators of the University of Missouri
InventorsHendrik P. Engelbrecht, Cathy S. Cutler, Leonard Manson, Stacy Lynn Wilder
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Abstract
A method for separating an amount of osmium from a mixture containing the osmium and at least one other additional metal is provided. In particular, method for forming and trapping OsO4 to separate the osmium from a mixture containing the osmium and at least one other additional metal is provided.
Claims23
A method of separating an amount of osmium from a mixture comprising the amount of osmium and at least one additional metal, the method comprising:
- contacting the mixture with an oxidizing solution to form a volatile OsO4 vapor;
- bubbling the OsO4 vapor through a KOH trapping solution to form an amount of K2[OsO4(OH)2] dissolved in the KOH trapping solution;
- contacting the dissolved K2[OsO4(OH)2] with a reducing agent to form an Os precipitate;
- and
- separating the Os precipitate from the KOH trapping solution, wherein the mixture is an irradiated osmium metal target comprising at least one osmium isotope selected from the group consisting of Os-184, Os-186, Os-187, Os-188, Os-189, Os-190, and Os-192.
A method of separating an amount of osmium from a mixture comprising the amount of osmium and at least one additional metal, comprising:
- contacting the mixture with an aqueous solution of NaClO at a concentration of about 12% w/v available chlorine to form a volatile OsO4 vapor;
- bubbling the OsO4 vapor through a trapping solution comprising an aqueous solution of KOH at a concentration of about 25% w/v to form an amount of dissolved K2[OsO4(OH)2];
- contacting the dissolved K2[OsO4(OH)2] with an aqueous solution of NaHS at a concentration of about 10% w/v to form an OsS2 precipitate;
- washing the OsS2 precipitate by agitating with water;
- separating the OsS2 precipitate from the KOH trapping solution by centrifuging;
- rinsing the OsS2 precipitate with acetone;
- and
- drying the OsS2 precipitate;
- wherein the mixture is an irradiated osmium metal target comprising at least one osmium isotope selected from the group consisting of Os-184, Os-186, Os-187, Os-188, Os-189, Os-190, and Os-192.
A method of separating an amount of osmium from a mixture comprising the amount of osmium and at least one additional metal, the method comprising:
- a. contacting the mixture with an oxidizing solution to form a volatile OsO4 vapor;
- b. bubbling the OsO4 vapor through a KOH trapping solution to form an amount of K2[OsO4(OH)2] dissolved in the KOH trapping solution;
- c. contacting the dissolved K2[OsO4(OH)2] with a reducing agent to form an Os precipitate;
- and
- d. separating the Os precipitate from the KOH trapping solution,
- wherein the oxidizing solution comprises an aqueous solution of an oxidizing agent chosen from NaClO, LiClO, KClO, NalO4, Na2S4O8, XeO3, NaClO2, NaClO3, NaClO4, NaOH in contact with Cl2 gas, alkali salts of ClO, ClO2, ClO3 and ClO4, or combinations thereof.
A method of separating an amount of osmium from a mixture comprising the amount of osmium and at least one additional metal, comprising:
- a. contacting the mixture with an aqueous solution of NaClO at a concentration of about 12% w/v available chlorine to form a volatile OsO4 vapor;
- b. bubbling the OsO4 vapor through a trapping solution comprising an aqueous solution of KOH at a concentration of about 25% w/v to form an amount of dissolved K2[OsO4(OH)2];
- c. contacting the dissolved K2[OsO4(OH)2] with an aqueous solution of NaHS at a concentration of about 10% w/v to form an OsS2 precipitate;
- d. washing the OsS2 precipitate by agitating with water;
- e. separating the OsS2 precipitate from the KOH trapping solution by centrifuging;
- f. rinsing the OsS2 precipitate with acetone;
- and
- g. drying the OsS2 precipitate.
Dependencies are inferred from the claim text.