Direct synthesis of calcium borohydride

Patent · Tue Oct 27 04:00:00 EDT 2009

OSTI ID:982370

Ronnebro, Ewa Carin Ellinor ^[1]; Majzoub, Eric H ^[2]

---

1. Dublin, CA
2. Pleasanton, CA

A method is disclosed for directly preparing an alkaline earth metal borohydride, i.e. Ca(BH.sub.4).sub.2, from the alkaline earth metal hydride and the alkaline earth metal boride. The borohydride thus prepared is doped with a small portion of a metal chloride catalyst compound, such as RuCl.sub.3, TiCl.sub.3, or a mixture of TiCl.sub.3 and palladium metal. The process provides for mechanically mixing the dry reagents under an inert atmosphere followed by charging the mixed materials with high pressure hydrogen at about 70 MPa while heating the mixture to about 400.degree. C. The method is relatively simple and inexpensive and provides reversible hydride compounds which are free of the usual contamination introduced by prior art wet chemical methods.

• Research Organization: Sandia National Laboratories (SNL-CA), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• Assignee: Sandia Corporation (Livermore, CA)
• Patent Number(s): 7,608,233
• Application Number: 11/807,012
• OSTI ID: 982370
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY