DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Direct synthesis of calcium borohydride

Abstract

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.

Inventors:
 [1];  [2]
  1. Dublin, CA
  2. Pleasanton, CA
Issue Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
982370
Patent Number(s):
7608233
Application Number:
11/807,012
Assignee:
Sandia Corporation (Livermore, CA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ronnebro, Ewa Carin Ellinor, and Majzoub, Eric H. Direct synthesis of calcium borohydride. United States: N. p., 2009. Web.
Ronnebro, Ewa Carin Ellinor, & Majzoub, Eric H. Direct synthesis of calcium borohydride. United States.
Ronnebro, Ewa Carin Ellinor, and Majzoub, Eric H. Tue . "Direct synthesis of calcium borohydride". United States. https://www.osti.gov/servlets/purl/982370.
@article{osti_982370,
title = {Direct synthesis of calcium borohydride},
author = {Ronnebro, Ewa Carin Ellinor and Majzoub, Eric H},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {10}
}

Works referenced in this record:

Complex of aluminum borohydride with calcium borohydride
journal, May 1975


Borohydrides of the alkali and alkaline-earth metals
journal, February 1976


Lithium boro-hydride LiBH4
journal, November 2002


Thermodynamical stability of calcium borohydride Ca ( B H 4 ) 2
journal, October 2006


Unexpected kinetic effect of MgB2 in reactive hydride composites containing complex borohydrides
journal, August 2007