Purification of barium ion source

• US 8,845,993 B2
• Filed: 01/20/2011
• Issued: 09/30/2014
• Est. Priority Date: 01/20/2010
• Status: Expired due to Fees

• Current Assignee: Eestor Inc. (FuelPositive Corp.)
• Original Assignee: Eestor Inc. (FuelPositive Corp.)
• Inventors: Pettey, Lucas, Weir, Richard D.
• Primary Examiner(s): Silverman, Stanley
• Assistant Examiner(s): BOVA, JUSTIN M
• Application Number:
  US13/010,516
• Publication Number:
  US 20110206595A1
• Time in Patent Office: 1,349 Days
• Field of Search: 423/155, 423/157, 423/395, 423/399
• 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 20 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 nitric acid in a range of 15 wt % to 35 wt % and having a temperature of not greater than 30°

C.;

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

wherein a single pass separation coefficient for strontium is at least 2000; and

wherein the method does not include washing the barium nitrate crystals with only deionized water.

2. The method of claim 1, wherein agitating includes ultrasonic agitating.

3. The method of claim 1, wherein the nitric acid solution added to the aqueous solution includes at least 40 wt % nitric acid.

4. The method of claim 1, wherein a single pass separation coefficient for calcium is at least 200.

5. The method of claim 1, wherein a single pass separation coefficient for sodium is at least 100.

6. The method of claim 1, wherein a single pass separation coefficient for potassium is at least 50.

7. The method of claim 1, wherein the single pass yield of barium ions is at least 85%.

8. The method of claim 1, wherein the single pass yield of barium ions is at least 90%.

9. The method of claim 1, wherein the single pass yield of barium ions is at least 92%.

10. The method of claim 1, wherein the single pass yield of barium ions is at least 94%.