PURIFICATION OF BARIUM ION SOURCE

• US 20110206595A1
• Filed: 01/20/2011
• Published: 08/25/2011
• Est. Priority Date: 01/20/2010
• Status: Active Grant

• Current Assignee: Eestor Inc. (FuelPositive Corp.)
• Original Assignee: Eestor Inc. (FuelPositive Corp.)
• Inventors: Pettey, Lucas, Weir, Richard D.
• Granted Patent: US 8,845,993 B2
• Time in Patent Office: Days
• US Class Current: 423/395
• CPC Class Codes: C01F 11/38 Preparation with nitric acid or nitrogen oxides

Abstract

A method of preparing purified barium nitrate includes precipitating barium nitrate crystals from a solution, and washing the barium nitrate crystals with an aqueous solution including at least 10 wt % nitric acid.

Claims

1. A method of preparing purified barium nitrate, the method comprising:

adding a nitric acid solution to an aqueous solution including barium ions to precipitate barium nitrate crystals, wherein the nitric acid solution is added in sufficient amount to provide a combined solution having at least 10 wt % nitric acid;

agitating the combined solution during precipitation of the barium nitrate crystals;

separating the barium nitrate crystals; and

washing the barium nitrate crystals with a wash solution including at least 15 wt % nitric acid and having a temperature of not greater than 30°

C.;

wherein the single pass yield of barium ions is at least 80%; and

wherein the single pass separation coefficient for strontium is at least 2000.

2-33. -33. (canceled)

34. A method of preparing purified barium nitrate, the method comprising:

precipitating barium nitrate crystals from a solution; and

washing the barium nitrate crystals with an aqueous solution including at least 10 wt % nitric acid.

35. The method of claim 34, wherein:

precipitating includes mixing a nitric acid solution with an ionic solution including barium ions to precipitate the barium nitrate crystals; and

the method further comprises separating the barium nitrate crystals.

36. The method of claim 34, wherein:

precipitating comprises adding a nitric acid solution to an ionic solution including barium ions to precipitate the barium nitrate crystals, wherein the nitric acid solution is added in a sufficient amount to provide a combined solution having at least 10 wt % nitric acid;

the method further comprises agitating the combined solution during precipitating of the barium nitrate crystals;

37. The method of claim 34, wherein the aqueous solution includes nitric acid in a range of 15 wt % to 35 wt %.

38. The method of claim 34, wherein the aqueous solution has a temperature of not greater than 50°

C.

45. The method of claim 34, further comprising separating the precipitated barium nitrate crystals from the solution.

49. The method of claim 34, further comprising agitating the solution while precipitating.

50. The method of claim 49, wherein agitating includes ultrasonic agitating.

51. The method of claim 34, wherein precipitating includes adding a nitric acid solution including at least 40 wt % nitric acid.

55. The method of claim 51, wherein the nitric acid solution is added in an amount sufficient to provide a combined solution including at least 10 wt % nitric acid.

56. The method of claim 55, wherein the amount is sufficient to provide a combined solution including at least 15 wt % nitric acid.

59. The method of claim 34, further comprising dissolving the washed barium nitrate crystals.

60. The method of claim 59, further comprising repeating precipitating and washing following dissolving.

61. The method of claim 34, wherein the single pass yield of barium ions is at least 80%.

66. The method of claim 34, wherein the single pass separation coefficient for strontium is at least 1000.

70. The method of claim 34, wherein the single pass separation coefficient for calcium is at least 200.

72. The method of claim 34, wherein the single pass separation coefficient for sodium is at least 100.

74. The method of claim 34, wherein the single pass separation coefficient for potassium is at least 50.

39-44. -44. (canceled)

46-48. -48. (canceled)

52-54. -54. (canceled)

57-58. -58. (canceled)

62-65. -65. (canceled)

67-69. -69. (canceled)

71. (canceled)

73. (canceled)

75. (canceled)

76. A method of preparing purified metal nitrate, the method comprising:

adding a nitrate ion source to a primary solution including a cation to precipitate cation nitrate crystals;

separating the cation nitrate crystals from the primary solution; and

washing the cation nitrate crystals with a wash solution including at least 10 wt % nitric acid and having a temperature of not greater than 30°

C.