Industrie De Nora S.p.a.

Industries De Nora S.p.a.

Alice Calderara

Luciano Iacopetti

Antonio Lorenzo Antozzi

Fabio Timpano

Marianna Brichese

Christian Urgeghe

Alice Gargiulo

Alexander Victorovich Morozov

Giuseppe Faita

Mariachiara Benedetto

Alessandro Fiorucci

Gian Nicola Martelli

Dino Floriano Di Franco

Ruben Ornelas Jacobo

Stefania Mora

Chiara Pezzoni

Claudia Jennifer Bargioni

Valentina Bonometti

Takashi Furusawa

Cecilia Del Curto

Fabio Sala

The invention relates to a process for obtaining a electrode usable as a anode in electrolytic cells for the production of chlorine. The electrode thus obtained comprises a catalytic layer containing oxides of tin, ruthenium, iridium and titanium applied to a substrate of a valve metal.

Anode for electrolytic evolution of chlorine

An electrode suitable as chlorine-evolving anode in electrolytic cells and a method for obtaining thereof is provided. The electrode has a metal substrate coated with a catalytic composition made of thin layers based on oxides of tin, iridium and ruthenium and combines excellent characteristics of anodic potential and selectivity with respect to the reaction of chlorine evolution without resorting to the use of dopants such as platinum and palladium.

An electrode, having a catalytic coating containing ruthenium and at least one other element selected from the group of alkaline earth metals, suitable to be used in industrial electrochemical processes for hydrogen evolution and to a method for the production of the same. The catalytic coating has 93-99 wt-% of ruthenium and 1-7 wt-% of alkaline earth metals, referred to the metals.

Electrode for electrochemical evolution of hydrogen

An electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution having a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).

Electrode for oxygen evolution in industrial electrochemical processes

The invention relates to an electrode for electrolytic processes, in particular to an anode suitable for oxygen evolution comprising a valve metal substrate, a catalytic layer, a protection layer consisting of oxides of valve metals interposed between the substrate and the catalytic layer and an outer coating of oxides of valve metals. The electrode of the invention is particularly suitable for processes of cathodic electrodeposition of chromium from an aqueous solution containing Cr (III).

An electrode for electrochemical processes comprises a substrate of titanium or other valve metal, an intermediate protection layer based on valve metal oxides and a catalytic layer based on oxides of tin and of iridium doped with small amounts of oxides of elements selected between bismuth, antimony, tantalum and niobium. The electrode used in electrometallurgical processes, for example in the electrowinning of metals, as anode for anodic oxygen evolution presents a reduced overvoltage and a higher duration.

Anode for oxygen evolution

The invention relates to a coating for providing protection against interstitial corrosion for titanium surfaces such as flanges or other equipment used in highly aggressive electrolytic environments, for example hydrochloric acid electrolysis cells. The coating according to the invention comprises a passivating layer, on which a film of water-repellent material is applied. The invention further relates to a method for providing anticorrosive protection for flanges of electrochemical cells.

Anticorrosive coating and method for obtaining same

An electrode on valve metal substrate suitable for the evolution of oxygen in electrolytic processes is provided with a coating having a catalytic layer containing platinum group metals and one or more protective layers based on tin oxide modified with a doping element selected from bismuth, antimony or tantalum and with a small amount of ruthenium. The electrode is useful in processes of non-ferrous metal electrowinning.

Electrode for electrolytic processes

The invention relates to a cell for metal electrowinning equipped with a device useful for preventing the adverse effects of dendrite growth on the cathodic deposit. The cell comprises a porous conductive screen, positioned between the anode and the cathode, capable of stopping the growth of dendrites and avoiding that they reach the anode surface.

Electrolytic cell for metal electrowinning

The invention relates to an electrode suitable for electrolytic treatments of dilute solutions of sodium chloride even at low temperatures. The electrode can be used in the generation of active chlorine-based biocidal agents in ballast water for marine applications. The electrode has a titanium substrate, an inner catalytic coating containing oxides of tantalum, ruthenium and iridium, and an outer catalytic coating containing oxides of titanium, ruthenium and of at least one of nickel, iron and cobalt.

Electrode for electrochlorination processes and method of manufacturing thereof

The invention relates to a cell for metal electrowinning equipped with a device useful for preventing the adverse effects of dendrite growth on the cathodic deposit. The cell comprises a porous conductive screen, positioned between the anode and the cathode, capable of stopping the growth of dendrites and preventing them from reaching the anode surface.

An electrode suitable for use as hydrogen-evolving cathode in electrolytic processes is obtained by thermal decomposition of a precursor consisting of an acetic solution of nitrates of ruthenium, and optionally of rare earths. The electrode displays a low cathodic hydrogen evolution overpotential, an improved tolerance to current reversal phenomena and a high duration in industrial operating conditions.

Electrode for electrochemical processes and method for obtaining the same

The invention relates to an electrode for electrolytic processes, particularly to a cathode suitable for hydrogen evolution in an industrial electrolysis process comprising a metal substrate coated with an external catalytic layer containing crystalline ruthenium oxide having a highly ordered rutile-type structure with Ru Ru and Ru O bond length characterized by a Debye-Waller factor lower than a critical value. The catalytic outer layer may contain rare earth oxides, such as praseodymium. The electrode may also comprise an internal catalytic thin layer platinum-based, which gives an enhanced protection against accidental current reversal events.

Electrode for electrolytic processes and method of manufacturing thereof

The invention relates to a catalytic coating suitable for oxygen-evolving anodes in electrochemical processes. The catalytic coating comprises an outermost layer with an iridium and tantalum oxide-based composition modified with amounts not higher than 5% by weight of titanium oxide.

Electrode for oxygen evolution in industrial electrolytic processes

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.

Growing community of inventors

Milan, Italy

Alice Calderara