Abstract: The present invention utilizes the hydrogen storage capabilities of hydrogen storage material to dehumidify and cool air flowing into an enclosed area, such as a residential home. The invention provides an apparatus and method that incorporates a hydrogen storage module having a low pressure, the heat retriever module, and a hydrogen storage module having a high pressure, the cooling module, wherein the modules are connected by a pipe or tube that guides the flow of hydrogen gas back and forth between the modules. The heat retriever module is heated to increase the temperature of the heat retriever module and hydrogen gas is desorbed from the hydrogen storage material contained therein, then a valve in the tube or pipe is opened and the hydrogen gas flows to the cooling module. The valve is closed, after the hydrogen gas is absorbed by the hydrogen storage material of the cooling module. The absorption of hydrogen gas causes an increase in temperature of the cooling module.

Abstract: Calculated performance improvements are expected from a particularly new class of compounds, geminal-bis(difluoramino)-substituted heterocyclic nitramines, when formulated into explosives and propellants. This invention involves novel and nonintuitive methods for the preparation of certain derivatives of 2,2-bis(difluoramino)-N-nitro-1,3-propanediamine which are suitable precursors leading to 5,5-bis(difluoramino)hexahydro-1,3-dinitropyrimidine (RNFX). The invention also involves novel and nonintuitive methods for the preparation of RNFX, a specific member of a general class of compounds with the substructure 2,2-bis(difluoramino)-N-nitro-1,3-propanediamine. RNFX is produced by the use of key intermediates, including tetrahydropyrimidin-5(4H)-ones, which allow formation of the target structural subcomponent, 2,2-bis(difluoramino)-N-nitro-1,3-propanediamine, and a more specific substructure of 2,2-bis(difluoramino)-N,N′-dinitro-1,3-propanediamine.