Abstract: Halogen hydrates, such as chlorine hydrate, are made by directing finely divided droplets of an aqueous medium onto a refrigerated surface which is at a temperature below that at which the hydrate forms, while also contacting said surface and said aqueous medium with the halogen to be converted to halogen hydrate. Apparatuses and methods are described. In a preferred embodiment of the invention the atomized droplets of aqueous medium, in very finely divided droplet form are directed onto a moving corrosion resistant metal surface from which the hydrate is subsequently removed. In another embodiment of the invention chlorine gas is utilized to atomize the aqueous medium and the mixture of chlorine and aqueous droplets is directed onto a forming surface.