PROCESS FOR SEPARATION OF DISSOLVED HYDROGEN FROM WATER BY USE OF PALLADIUM AND PROCESS FOR COATING PALLADIUM WITH PALLADIUM BLACK

摘要

Dissolved gaseous hydrogen in water is separated from the water by placing the water in contact with a thin metallic film of palladium or palladium-silver alloy, both sides of which film have been coated with palladium black. The other side of the film has less pressure than the partial pressure of the hydrogen dissolved in the water. The hydrogen dissolved in the water permeates the film and passes to the other side of it. Preferably the palladium black is applied to the metallic film by etching the film, rubbing palladium chloride powder on the film, reducing the palladium chloride to palladium black by exposing it to gaseous hydrogen, depositing additional palladium black from a palladium chloride solution and rubbing the palladium black coating to remove excess black and provide a tightly bonded adherent coating.