Industrie De Nora S.p.A. Patent applications |
Patent application number | Title | Published |
20150292106 | 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). | 10-15-2015 |
20150096896 | ELECTRODE FOR EVOLUTION OF GASEOUS PRODUCTS AND METHOD OF MANUFACTURING THEREOF - The invention relates to an electrode suitable as anode for evolution of gaseous products comprising a metal substrate coated with at least one titanium suboxide layer having an interconnected porosity and containing catalytic noble metal oxides. The invention further relates to a method of manufacturing such electrode comprising applying a mixture of titanium suboxides and noble metal oxide-based catalyst on a valve metal substrate via cold gas spray technique. | 04-09-2015 |
20150041323 | CELL FOR DEPOLARISED ELECTRODIALYSIS OF SALT SOLUTIONS - The invention relates to a salt solution electrodialysis cell for production of the relevant acids and bases by means of a process with reduced or nil consumption of electrical energy. The cell comprises an anodic chamber fed with hydrogen and a cathodic chamber fed with oxygen or air, provided with the relevant gas-diffusion electrodes; the driving power of the electrodialysis process is given by the oxidation and reduction chemical potentials of hydrogen and oxygen fed to the two chambers. | 02-12-2015 |
20140311915 | ANODE FOR OXYGEN EVOLUTION - 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. | 10-23-2014 |
20140246306 | ANODIC COMPARTMENT FOR METAL ELECTROWINNING CELLS - The present invention concerns an anodic compartment for metal electrowinning cells delimited by a frame-shaped skeleton comprising an envelope including a permeable separator secured to said frame-shaped skeleton by means of a frame-shaped flange, at least one anode obtained starting from a valve metal substrate coated with at least one corrosion-resistant catalytic layer, said anode being inserted inside said envelope, and a demister located above said anode and delimited by said separator and said skeleton. The invention also concerns an electrochemical cell for metal electrowinning comprising at least one such anodic compartment. | 09-04-2014 |
20140231267 | ANODIC STRUCTURE FOR HORIZONTAL CELLS FOR PROCESSES OF METAL ELECTRODEPOSITION - The present invention concerns an electrode for oxygen evolution in electroplating plants comprising a valve metal substrate and an outer catalytic layer, the substrate consisting of a metal plate provided with slits of area ranging from 2 to 8 cm | 08-21-2014 |
20140209455 | PERMANENT SYSTEM FOR CONTINUOUS DETECTION OF CURRENT DISTRIBUTION IN INTERCONNECTED ELECTROLYTIC CELLS - The invention relates to a current collecting bus-bar comprising electrode housings for accommodating a multiplicity of electrodes in electrical contact therewith. Probes for measuring the electric potential locally established in correspondence of the electrical contacts during the passage of electric current are also connected to the bus-bar. The invention further relates to a permanent monitoring system allowing the continuous evaluation of current distribution on each electrode of electrolysis cells of metal electrowinning or electrorefining plants, connected to an alerting system and to means for disconnecting individual electrodes in case on non-compliance with preset values. | 07-31-2014 |
20140008215 | ELECTRODE FOR ELECTROLYTIC PROCESSES AND METHOD OF MANUFACTURING THEREOF - 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 characterised 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. | 01-09-2014 |
20130228450 | ELECTRODE FOR ELECTROLYTIC CELL - The invention relates to an electrode for evolution of gaseous products in electrolysis cells comprising e metal substrate coated with at least two catalytic compositions, the outermost catalytic composition being deposited by means of chemical or physical phase vapour deposition technique and having a composition comprising noble metals selected from the group of platinum group metals or oxides thereof. | 09-05-2013 |
20130186750 | ANODE FOR ELECTROLYTIC EVOLUTION OF CHLORINE - 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. | 07-25-2013 |
20130168261 | ANODE FOR CATHODIC PROTECTION AND METHOD FOR MANUFACTURING THE SAME - It is described a metal anode for cathodic protection in form of mesh ribbon having meshes whose holes are of rhomboidal shape, characterised by having such holes of rhomboidal shape arranged with the major diagonal oriented along the direction of the ribbon length and by the fact that the side edges along the ribbon length are free from cutting protrusions. It is also described a method for obtaining such anode. | 07-04-2013 |
20130087450 | ELECTRODE FOR ELECTROCHLORINATION - The invention relates to an electrode for electrochemical generation of hypochlorite. The electrode comprises a valve metal substrate coated with a catalytic system consisting of two super-imposed layers of distinct composition and having a different activity towards hypochlorite anodic generation from chloride solutions. The electrode has a high duration in cathodic operation conditions, imparting self-cleaning characteristics thereto when used in combination with an equivalent one with periodic polarity reversal. Moreover, the deactivation of the electrode at the end of its life cycle occurs in two subsequent steps, allowing to schedule the substitution thereof with a significant notice period. | 04-11-2013 |
20130087449 | SYSTEM FOR ELECTROCHEMICAL GENERATION OF HYPOCHLORITE - The invention relates to a system for a point-of-use electrochemical generation of hypochlorite on demand in a wide range of volumes and concentration. The system is provided with a processor which adjusts the electrolyte composition, the current density and the electrolysis time, commanding an alert system capable of warning in advance whenever the replacement of electrodes is needed. Automated detection of the insertion and the correct type of several collecting vessels can also be provided, triggering the set-up of electrolysis parameters accordingly. | 04-11-2013 |
20120318748 | ELECTROCHLORINATION METHOD FOR ABOVE-GROUND SWIMMING POOLS - The invention relate to the addition of mixture of non-halide salts to the water of above-ground swimming pools to allow sterilisation by in-situ electrochlorination with a modest sodium chloride content. A limitation of sodium chloride concentration in above-ground pools is necessary to prevent corrosion of the relevant steel supporting structure. The salt mixture additive contains sodium bisulphate and other salts of low toxicity. | 12-20-2012 |
20120312683 | Electrode for Electrochemical Processes and Method for Obtaining the Same - 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. | 12-13-2012 |
20120305029 | SEPARATOR FOR CHLOR-ALKALI ELECTROLYTIC CELLS AND METHOD FOR ITS MANUFACTURING - The invention relates to a synthetic diaphragm for chlor-alkali cells with improved energy consumption and gas separation characteristics. The diaphragm comprises a network of polymer fibres bound to a hydrophilic ceramic material containing zirconium chemically bound to hydroxyl groups. The ceramic material is obtained starting from ZrO | 12-06-2012 |
20120285825 | Device for Hand Disinfection - The invention relates to an apparatus for hand washing and disinfection by nebulisation of an in-situ electrolysed active solution. The dispensed solution contains active chlorine optionally added with ozone or peroxides. | 11-15-2012 |
20120234676 | DIAPHRAGM OF PREDEFINED POROSITY AND METHOD OF MANUFACTURING - 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 vapour deposition of a ruthenium or ruthenium oxide layer. | 09-20-2012 |
20120199473 | Cathode for Electrolytic Processes - A cathode for electrolytic processes, particularly suitable for hydrogen evolution in chlor-alkali electrolysis comprises a metal substrate provided with a catalytic coating made of two layers containing palladium, rare earths (such as praseodymium) and a noble component selected between platinum and ruthenium. The rare earth percent amount by weight is lower in the outer layer than in the inner layer. | 08-09-2012 |
20120175270 | Electrode for Electrolytic Processes with Controlled Crystalline Structure - 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 vapour deposition of a ruthenium or ruthenium oxide layer. | 07-12-2012 |
20120164344 | Activation of Electrode Surfaces by Means of Vacuum Deposition Techniques in a Continuous Process - The invention relates to a method of manufacturing of metal electrodes for electrolytic applications by means of a continuous deposition of a layer of noble metals upon metal substrates by a physical vapour deposition technique. | 06-28-2012 |
20120125785 | Cathode for Electrolytic Processes - The invention relates to an electrode for electrolytic applications, optionally an oxygen-evolving anode, obtained on a titanium substrate and having a highly compact dual barrier layer comprising titanium and tantalum oxides and a catalytic layer. A method for forming the dual barrier layer comprises the thermal decomposition of a precursor solution applied to the substrate optionally followed by a quenching step and a lengthy thermal treatment at elevated temperature. | 05-24-2012 |
20120118754 | Electrode for Oxygen Evolution in Industrial Electrolytic Processes - 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. | 05-17-2012 |
20120061237 | CATHODE FOR ELECTROLYTIC PROCESSES - The invention relates to a cathode for electrolytic processes with evolution of hydrogen comprising a metal substrate with a noble metal-based activation layer and two protective layers, one interposed between the activation layer and the substrate and one external, containing an electroless-depositable alloy of a metal comprising one of nickel, cobalt and iron with a non-metal selected from phosphorus and boron, with the optional addition of a transition element selected between tungsten and rhenium. | 03-15-2012 |
20110226627 | ELECTRODE SUITABLE AS HYDROGEN-EVOLVING CATHODE - The invention relates to a cathode for hydrogen evolution in electrolysis cells, for instance chlor-alkali cells or cells for producing chlorate or hypochlorite, obtained starting from a substrate of nickel or other conductive material galvanically coated with nickel co-deposited with an amorphous molybdenum oxide. | 09-22-2011 |
20110209992 | Electrode for Electrolysis Cell - 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. | 09-01-2011 |
20110174628 | CATHODE MEMBER AND BIPOLAR PLATE FOR HYPOCHLORITE CELLS - A cathodic member for electrochemical cells used in hypochlorite production comprises a zirconium plate coated with a zirconium oxide layer, which is particularly suitable for minimising the decomposition of the hypochlorite product while ensuring a prolonged lifetime. The coated zirconium plate can be used as the cathodic plate in a monopolar cell, or can be welded to a titanium plate for use in a bipolar configuration. | 07-21-2011 |
20110108436 | Method for Treating Industrial Waste Waters - There is disclosed a treatment process of wastes containing organic molecules with electron-withdrawing groups on conjugated unsaturated bonds, for instance belonging to aromatic rings. The process comprises an electrochemical reduction step and a simultaneous or subsequent oxidation step, optionally also of electrochemical nature. | 05-12-2011 |
20100272830 | Biocide Combination for use in Agricultural Applications - The invention is directed to a combination characterised by a high biocide power for use in agricultural applications, comprising a sodium or potassium hypochlorite solution and an agent allowing to generate hypochiorous acid at the moment of the application, adjusting the concentration thereof in a simple way. | 10-28-2010 |
20100236922 | Separator for Chlor-Alkali Electrolytic Cells and Method for its Manufacturing - The invention relates to a synthetic diaphragm for chlor-alkali cells with improved energy consumption and gas separation characteristics. The diaphragm comprises a network of polymer fibres bound to a hydrophilic ceramic material containing zirconium chemically bound to hydroxyl groups. The ceramic material is obtained starting from ZrO | 09-23-2010 |
20100183745 | Electrochemical Device for Biocide Treatment in Agricultural Applications - The invention relates to an electrochemical device which simultaneously carries out the production of an oxidising solution at controlled composition containing hypochlorous acid and the sprinkling thereof in a continuous process, useful for biocide treatments in agricultural fields. The device can be installed on motor vehicles or mobile means in general. | 07-22-2010 |
20100096275 | Cathode for Electrolysis Cell - The invention relates to a cathode for diaphragm chlor-alkali cells delimited by a conductive foraminous surface and having an internal volume containing two juxtaposed elements aimed at improving the fluid and electrical current distribution. | 04-22-2010 |
20100084266 | Electrodes with Mechanically Roughened Surface for Electrochemical Applications - The invention relates to a method for roughening the surface of a metal sheet used as electrode support in industrial electrochemical applications, and an electrode made by such method. Mechanical roughening is imparted by skin-passing the sheet between two rollers of a rolling mill, at least one of which is patterned according to a predetermined profile to be transferred by compression to the surface of the metal sheet. | 04-08-2010 |
20100059389 | Electrode for Membrane Electrolysis Cells - The invention relates to an electrode for membrane electrolysis cells comprising a grooved metal support favouring the gas release and the electrolyte renewal on its surface. The grooved geometry of the support may be obtained by erosion of a metal sheet with abrasive media in a continuous process. | 03-11-2010 |
20090211918 | ELECTROCHEMICAL CELL AND METHOD FOR OPERATING THE SAME - The invention relates to an electrochemical cell comprising an arrangement of anode/cathode pairs, in which the accumulation of scales or similar fouling phenomena are prevented by alternatively operating either the anode or the cathode of one pair and the corresponding counterelectrode of the adjacent pair, the non-operated electrode of each pair being at open circuit. The electrolyte dissolves the scale deposits on the electrodes at open circuit, without resorting to harmful current reversal. | 08-27-2009 |
20090200162 | Anode for Electrolysis - The invention relates to an anode comprising a titanium alloy substrate coated with noble metals by thermal decomposition of precursors thereof. The alloy of the substrate includes elements which can be oxidised during the thermal decomposition step, allowing electrical energy savings and a prolonged duration in industrial electrolytic processes. The anode of the invention is suitable for chlor-alkali electrolysis, allowing to produce chlorine with a lower oxygen content and a lower energy consumption than the anodes of the prior art. | 08-13-2009 |
20090194411 | Cathode For Electrolytic Processes - 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 oxidising metal oxide, preferably chromium or praseodymium oxide. | 08-06-2009 |
20090178931 | Electrolysis Cell for Hydrogen Peroxide Production and Method of Use - An electrolytic cell for the production of hydrogen peroxide with faradic efficiency and a method for the production of highly pure hydrogen peroxide with high faradic efficiency are disclosed. The cell is provided with a separator of high hydraulic permeability and is equipped with an oxygen-fed gas-diffusion cathode and with an anode activated with a catalyst for oxygen evolution. The high faradic efficiency of hydrogen peroxide generation is allowed by the dilution of product hydrogen peroxide by the anolyte crossing the permeable separator, and by keeping the operating temperature at values below 50° C. | 07-16-2009 |
20090038956 | Amalgam Decomposer for Mercury Cathode Cells for Alkali Chloride Electrolysis - The invention relates to an amalgam decomposer for mercury cathode chlor-alkali cells. The amalgam decomposer of the invention contains a filling of carbon steel rings whose external surface is provided with a catalytic coating for amalgam decomposition consisting of one or more electrically conductive metals carbides. The internal surface of the rings is free of catalytic coating and wettable by the amalgam, while the external carbide catalytic coating is not wettable by the amalgam thereby favouring hydrogen evolution. | 02-12-2009 |
20090032407 | Device for the Separation of Mercury from Caustic Soda in Chlor-Alkali Plants - The invention relates to a device for breaking the electrical continuity of the stream of caustic soda produced in mercury-cathode chlor-alkali plants. The device is comprised of a vessel internally subdivided into three compartments by two flow-conveying septa, the three compartments being in communication and defining a caustic soda tortuous flow-path allowing the centrifugal deposition of mercury microdroplets released by the upstream amalgam decomposer | 02-05-2009 |
20080230381 | SYSTEM FOR THE ELECTROLYTIC PRODUCTION OF SODIUM CHLORATE - A system for the electrolytic production of sodium chlorate having a sodium chloride brine buffered with phosphate and having a reduced or zero chromium content is disclosed. The system comprises electrolytic cells of the undivided type with intercalated cathodes and anodes. The cathodes can comprise steel perforated sheets activated with a Fe—Mo alloy coating. | 09-25-2008 |