Recycling of BNHx-Waste Products

4) Formation of AB materials by the ammoniation of BH3with X being a halogen atom. 

An early proposal by Sneddon applied CF3COOH as digestion agent and used NMe3-AlH3 as hydride for the hydrogenation step. The development of this procedure was soon abandoned to avoid the formation of the strong B—O bonds. 

These considerations suggest for the development of an energetically effective procedure, the realization of the direct hydrogenation of the boron species created in the digestion process with molecular hydrogen. Up to now very little work concerning the direct molecular hydrogenation of BX3 species has been carried out. 

The direct dehydrochlorination of BCI3 was reported by Murib et al. at 600-700 °C using silver meshes as catalyst [151]  

A continuously operating pilot system was built in thel960s producing 1kg B2H6 h at 99% purity. The procedure includes the subsequent rapid quenching of the reaction mixture to a temperature of—196 °C, followed by the decomposition of BHCI2 at —80°C according to 

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