Abstract: A method for efficiently producing a high-purity metal hydride without contamination of other metals while initiating reaction rapidly is provided. A method for producing a metal hydride from a metal selected from the group consisting of Group 2 metals and Group 3 metals comprising: (A) charging the pressure resistant container with the metal, introducing hydrogen into the container, and heating the container to initiate reaction, wherein a gauge pressure (a) is set to 0.1 to 1.5 MPa, a heating temperature (b) is set to 50 to 250° C., and a product of the gauge pressure and the heating temperature, a×b, is set in the range of 20 to 100; (B) stopping the introduction of hydrogen to allow the reaction to proceed when the temperature in the reaction container is increased to a temperature higher by 10 to 100° C. than the heating temperature; (C) introducing hydrogen of 0.1 to 1.

Abstract: A method for efficiently producing a high-purity metal hydride without contamination of other metals while initiating reaction rapidly is provided. A method for producing a metal hydride from a metal selected from the group consisting of Group 2 metals and Group 3 metals comprising: (A) charging the pressure resistant container with the metal, introducing hydrogen into the container, and heating the container to initiate reaction, wherein a gauge pressure (a) is set to 0.1 to 1.5 MPa, a heating temperature (b) is set to 50 to 250° C., and a product of the gauge pressure and the heating temperature, a×b, is set in the range of 20 to 100; (B) stopping the introduction of hydrogen to allow the reaction to proceed when the temperature in the reaction container is increased to a temperature higher by 10 to 100° C. than the heating temperature; (C) introducing hydrogen of 0.1 to 1.

Abstract: There is provided a method for efficiently producing a high-purity alkali metal nitride or alkaline earth metal nitride by simple processes. Specifically provided is a method for producing an alkali metal nitride, an alkaline earth metal nitride, or a composite thereof, the method including thermally decomposing one or more alkali metal amides or alkaline earth metal amides.

Abstract: There is provided a method for producing a high-purity metal nitride by simple processes with good yield. Specifically provided is a method for producing a metal nitride including heating a metal hydride under a nitrogen gas or an ammonia gas.

Abstract: There is provided a method for producing a high-purity metal nitride by simple processes with good yield. Specifically provided is a method for producing a metal nitride including heating a metal hydride under a nitrogen gas or an ammonia gas.

Abstract: There is provided a method for efficiently producing a high-purity alkali metal nitride or alkaline earth metal nitride by simple processes. Specifically provided is a method for producing an alkali metal nitride, an alkaline earth metal nitride, or a composite thereof, the method including thermally decomposing one or more alkali metal amides or alkaline earth metal amides.

Abstract: A hydrogen storage matter contains at least a nano-structured and organized lithium imide compound precursor complex. In the hydrogen stroge matter, the lithium imide compound precursor complex has been nano-structured and organized by mixing fine powder lithium amide with fine powder lithium hydride at a predetermined ratio to prepare a mixture as a starting material, and then processing the mixture by a predetermined complex formation processing method.

Abstract: A hydrogen storage matter contains at least a nano-structured and organized lithium imide compound precursor complex. In the hydrogen stroge matter, the lithium imide compound precursor complex has been nano-structured and organized by mixing fine powder lithium amide with fine powder lithium hydride at a predetermined ratio to prepare a mixture as a starting material, and then processing the mixture by a predetermined complex formation processing method.

Abstract: A novel process is provided for producing a 5-perfluoroalkyl-5,6-dihydrouracil represented by General Formula (1): ##STR1## (where R.sup.1 and R.sup.2 are independently hydrogen, methyl, or ethyl, and Rf is a perfluoroalkyl of 1 to 10 carbons). The process comprises reacting .alpha.-perfluoroalkylacrylic acid represented by General Formula (2):CH.sub.2 =C(Rf)--COOH (2)with a urea derivative represented by General Formula (3):R.sup.1 NHCONHR.sup.2 (3)in the presence of acetic anhydride with formed acetic acid being removed out of the reaction system during the reaction. The .alpha.-perfluoroalkylacrylic acid may be added successively. A process for producing a 5-perfluoroalkyl-5-bromo-6-hydrouracil by General Formula (4) is also provided: ##STR2## (where R.sup.1, R.sup.2, and Rf are as defined above) wherein the reaction of a 5-perfluoroalkyl-5,6-dihydrouracil produced by the above process with bromine is conducted in water as the solvent.