The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1978
Filed:
Jul. 06, 1976
Giancarlo Perugini, Merano (Bolzano), IT;
Enzo Marcaccioli, Perugia, IT;
Montedison S.p.A., Milan, IT;
Abstract
A process is disclosed for the preparation of a metallic and/or metal-ceramic and/or ceramic sponge with a three-dimensional cellular structure of filiform morphology, starting from a plastic sponge with a three-dimensional cellular structure of filiform morphology, which has been preliminarily metallized while maintaining substantially unaltered the initial geometrical shape, said process being characterized in that said metallized sponge is coated with a metallic and/or metal-ceramic and/or ceramic material, the coating with said metallic and/or metal-ceramic material being carried out by molten-spray deposition, galvanic co-deposition, evaporation under vacuum, or reactive sputtering, while the coating with the ceramic material is carried out by molten-spray deposition, reactive sputtering or chemical vapor deposition. The starting plastic sponge is foamed polyurethane preferably having a number of pores not exceeding 30 pores/inch, and a thickness not exceeding 25 mm. The metal-ceramic material consists essentially of one or more metal components selected from the class consisting of chromium and nickel associated with one or more ceramic compounds selected from the class consisting of Al.sub.2 O.sub.3, MgO, ZrO.sub.2 and Cr.sub.3 C.sub.2, and the ceramic material is selected from the class consisting of ZrO.sub.2, Al.sub.2 O.sub.3, MgO.Al.sub.2 O.sub.3, 3Al.sub.2 O.sub.3.2SiO.sub.2, CaZrO.sub.3, MgZrO.sub.3, WC, TaC, MoC, TiC, ZrC and Cr.sub.3 C.sub.2. The sponges per se as well as supporting structures for catalysts in heterogenous catalytic processes are also claimed.