Method for producing separating nozzle elements for the separation of fluid mixtures

A method for producing a separating nozzle element composed of a separating body and two cover plates between which the body is interposed, the separation nozzle element being used for the separation of gaseous or vaporous mixtures, comprising:

• providing a layer of a material whose ability to be removed from the layer can be altered by irradiation with radiation of a selected type, the thickness of the layer being approximately equal to the thickness of the separating body;
• irradiating the layer, starting at one surface, with radiation which is of the selected type and which has a penetration depth into the material of the layer which is less than thickness of the layer, in a pattern corresponding to the cross-section of the separating body;
• removing from the layer material which is more easily removable as a result of said irradiation to form a mold of the separating body;
• and
• filling the mold with structure material which is compatible with the mixtures to be separated and removing the material constituting the mold to create the separating body;
• wherein said irradiation and said removal of material which is more easily removable comprise removing material at successively increasing distances from the one surface while causing the radiation to penetrate the material at successively increasing distances from the one surface as a result of the removal of the material.