Method for synthesizing metal bis(borano) hypophosphite complexes
| DWPI Title: Making metal bis(borano)hypophosphite complex used as hydrogen storage materials involves reacting alkali/alkaline earth metal borohydride with solution of phosphorus trichloride |
| Abstract: The present invention describes the synthesis of a family of metal bis(borano) hypophosphite complexes. One procedure described in detail is the syntheses of complexes beginning from phosphorus trichloride and sodium borohydride. Temperature, solvent, concentration, and atmosphere are all critical to ensure product formation. In the case of sodium bis(borano) hypophosphite, hydrogen gas was evolved upon heating at temperatures above 150° C. Included in this family of materials are the salts of the alkali metals Li, Na and K, and those of the alkaline earth metals Mg and Ca. Hydrogen storage materials are possible. In particular the lithium salt, Li[PH2(BH3)2], theoretically would contain nearly 12 wt % hydrogen. Analytical data for product characterization and thermal properties are given. |
| Use: For synthesizing a metal bis(borano) hypophosphite complex (claimed) used as hydrogen storage materials. |
| Advantage: The reproducibility of the yields of this process is 50-80%. |
| Novelty: Preparing metal bis(borano) hypophosphite complex involves reacting solution of alkali/alkaline earth metal borohydride compound in first dry solvent (s1) with solution of phosphorus trichloride with second quantity of (s1); mixing and warming; removing (S1); adding second solvent to solid residue to form a third suspension solution; filtering through diatomaceous earth; collecting first filtrate liquid; and removing the second solvent and any remaining first solvent from the first filtrate liquid under vacuum. |
| Filed: 7/2/2010 |
| Application Number: US2010829592A |
| Tech ID: SD 11426.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
| Data from Derwent World Patents Index, provided by Clarivate All rights reserved. Republication or redistribution of Clarivate content, including by framing or similar means, is prohibited without the prior written consent of Clarivate. Clarivate and its logo, as well as all other trademarks used herein are trademarks of their respective owners and used under license. |