Industrie De Nora S.p.a.

Basell Polyolefine Gmbh

Industries De Nora S.p.a.

Christian Urgeghe

Antonio Lorenzo Antozzi

Alice Calderara

Alexander Victorovich Morozov

Luciano Iacopetti

Fulvio Federico

Mariachiara Benedetto

Gian Nicola Martelli

Pier Luigi Di Federico

Achille De Battisti

Dino Floriano Di Franco

Stefania Mora

Claudia Jennifer Bargioni

Dinara Iantilina

Chiara Pezzoni

Andrea Francesco Gullà

An electrode suitable for chlorine evolution in electrolysis cells consists of a metal substrate coated with two distinct compositions applied in alternate layers, the former comprising oxides of iridium, ruthenium and valve metals, for instance tantalum, and the latter comprising oxides of iridium, ruthenium and tin. The thus-obtained electrode couples excellent characteristics of anodic potential and selectivity towards the chlorine evolution reaction.

Anode for electrolytic evolution of chlorine

The invention relates to a cathode for electrolytic processes provided with a catalytic coating based on ruthenium crystallites with highly controlled size falling in a range of 1-10 nm. The coating can be produced by physical vapor deposition of a ruthenium or ruthenium oxide layer.

Electrode for electrolytic processes with controlled crystalline structure

The invention relates to an electrode formulation comprising a catalytic layer containing tin, ruthenium, iridium, palladium and niobium oxides applied to a titanium or other valve metal substrate. A protective layer based on titanium oxide modified with oxides of other elements such as tantalum, niobium or bismuth may be interposed between the substrate and the catalytic layer. The thus obtained electrode is suitable for use as an anode in electrolysis cells for chlorine production.

Electrode for electrolysis cell

The invention relates to a gas-diffusion electrode for chlor-alkali electrolysis cells integrated in a percolator of plastic porous material suitable for being vertically crossed by a downward flow of electrolyte. The electrode comprises a catalytic composition based on silver and/or nickel mixed to a polymeric binder, directly supported on the percolator without any interposed reticulated metal current collector.

Gas diffusion electrode for electrolyte-percolating cells

The invention relates to a cathode for electrolytic processes, particularly suitable for hydrogen evolution in chlor-alkali electrolysis, consisting of a nickel substrate provided with a coating comprising a protective zone containing palladium and a physically distinct catalytic activation containing platinum or ruthenium optionally mixed with a highly oxidizing metal oxide, preferably chromium or praseodymium oxide.

Cathode for electrolytic processes

Process for the reduction of a hexavalent chromium oxide based catalyst comprising contacting, under mixing conditions, a hexavalent chromium oxide based catalyst, with a molar excess, in respect of the chromium species, of a solid reducing agent and subjecting the mixture to a temperature in the range 30-1000&#xb0; C. The process is simple, involves low costs and allows to obtain a permanently reduced chromium catalyst that can be disposed without toxicity risks.

Process for the reduction of activated chromium oxide catalyst

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Redecesio-Segrate, Italy

Christian Urgeghe