Permeable laminated composite unit for physico-chemical processing

摘要

Use is made, in order to support a sheet of a material active in a chemical or physical process operated at widely varying temperatures, process contemplated for example a catalytic gauze made of a precious metal in the case of the catalytic oxidation of ammonia, of an "articulated" cloth consisting of helixes of wire made of a refractory metal alloy, said helixes being assembled in a parallel direction with respect to one another through "screwing" of the adjacent helixes with one another, said cloth being stretched, with an extension of approximately 2% in length in all directions, in a frame of appropriate shape.