De Nora
Corporate brand
UnclaimedItalian electrochemical technology company supplying electrodes and systems for industrial chemistry, water treatment, and green-hydrogen production.
Last updated August 31, 2026
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Overview
De Nora, formally Industrie De Nora S.p.A., is an Italian multinational company headquartered in Milan and focused on electrochemical technologies. Its principal business is the design, manufacture, and servicing of electrodes and electrochemical systems used in large-scale industrial processes. The company’s technologies support chlor-alkali production, metal electrowinning, water disinfection and treatment, and emerging energy-transition applications such as green-hydrogen generation. The company was founded in 1923 by Italian engineer and inventor Oronzio De Nora. Among his inventions was Amuchina, a disinfectant product that became associated with water sanitation and hygiene. De Nora’s later development centered on electrochemical engineering, particularly the production of durable, high-performance electrodes for processes in which electricity drives chemical reactions. The company is widely described as a leading global supplier of electrodes for major industrial electrochemical applications. De Nora began a significant international expansion in 1969. It first entered Japan and subsequently established operations, subsidiaries, or joint ventures in markets including Singapore, Brazil, India, China, and Germany. Its international footprint later extended across Europe, North America, the Middle East, and Asia. This geographic development enabled the company to serve industrial customers close to their production sites and to participate in regional infrastructure and energy projects. The business is organized around three broad application areas. Industrial applications include electrodes and related technologies for chlor-alkali plants, metal production, and other electrochemical manufacturing processes. Water treatment and filtration became an additional strategic area from 2015, allowing De Nora to apply its electrode and disinfection expertise to municipal, industrial, and infrastructure-related water systems. The third area is energy transition, particularly equipment and electrode technologies used in alkaline water electrolysis for green-hydrogen production. A notable recent project is De Nora’s collaboration with ThyssenKrupp through a joint venture. In December 2021, the partners were reported to have been awarded the supply of electrolysis systems for the green-hydrogen plant planned as part of the NEOM project in Saudi Arabia. The project underscored De Nora’s role in applying established electrochemical expertise to large renewable-hydrogen infrastructure. De Nora became publicly listed on the Italian Stock Exchange in 2022. Reference material reports 2022 revenue of €852.826 million and net income of €89.665 million; these figures relate specifically to the 2022 financial year. The company continues to operate internationally across industrial electrochemistry, water treatment, and hydrogen-related technologies.
History
De Nora was established in 1923 by Italian engineer Oronzio De Nora. The founder was also associated with the invention of Amuchina, a disinfectant product, while the company that carried his name developed into a specialist in electrochemical engineering. Its core expertise became the production of electrodes and related systems that enable or improve industrial chemical reactions driven by electricity. The company’s historical development is closely connected with the wider growth of industrial electrochemistry. De Nora supplied technologies for processes including chlor-alkali production and metal electrowinning, where electrode performance affects energy use, product quality, operating reliability, and plant maintenance. Rather than operating primarily as a consumer-facing manufacturer, the company built its business around technical products and systems sold to industrial operators and engineering customers. A major phase of internationalization began in 1969. De Nora entered Japan and then expanded through additional subsidiaries, operating companies, and joint ventures in Singapore, Brazil, India, China, and Germany. Over time, its international operations broadened to include Italy, the United Kingdom, the United States, the United Arab Emirates, and other markets. This network supported local customer service and enabled the company to participate in industrial projects across several continents. From 2015 onward, De Nora also operated in water treatment and filtration. This expansion extended its electrochemical capabilities beyond traditional industrial chemistry. Electrode-based disinfection and treatment technologies can be applied in municipal, industrial, and infrastructure settings, giving the company a second major application platform alongside process industries. The company later increased its involvement in energy-transition technologies. Its electrochemical expertise is relevant to water electrolysis, particularly alkaline electrolysis for producing hydrogen from water using electricity. In December 2021, De Nora’s joint venture with ThyssenKrupp was reported to have been awarded the supply of electrolysis systems for the green-hydrogen plant associated with the NEOM project in Saudi Arabia. The project represented a high-profile application of the company’s established electrode and electrolysis capabilities to renewable-energy infrastructure. In 2022, Industrie De Nora was listed on the Italian Stock Exchange. Reference material reports revenue of €852.826 million and net income of €89.665 million for that year. By this stage, De Nora’s activities were concentrated in three principal areas: industrial electrochemical applications, water treatment, and energy-transition technologies, with operations and customers distributed across Europe, the Americas, Asia, and the Middle East.
- 2022
Italian stock-market listing
[1]Industrie De Nora became listed on the Italian Stock Exchange.
- 2021
NEOM green-hydrogen project award
[1]Through a joint venture with ThyssenKrupp, De Nora was reported to have been awarded the supply of electrolysis systems for the planned NEOM green-hydrogen facility in Saudi Arabia.
- 2015
Expansion into water treatment
[1]The company began operating in water treatment and filtration, applying its electrochemical expertise to water-related technologies.
- 1969
International expansion begins
[1]De Nora began a major geographic expansion, entering Japan and subsequently developing operations and partnerships in additional international markets.
- 1923
Company founded
[1]Italian engineer Oronzio De Nora founded the company, establishing the business that later became Industrie De Nora.
Products and positioning
A global specialist in industrial electrochemistry, combining electrode technology with systems engineering for chemical manufacturing, water treatment, and the energy transition.
Industrial electrochemistry
Industrial electrodes
De Nora’s core offering is a broad range of electrodes designed for industrial electrochemical processes. These components are engineered to operate in demanding chemical environments and are used to support process efficiency, product consistency, and equipment reliability. Applications include chlor-alkali production, metal electrowinning, and other industrial processes in which electrochemical reactions are central to manufacturing.
Industrial electrodes
Dimensionally stable anodes
Dimensionally stable anodes are a major class of electrode technology associated with De Nora. They are used in industrial electrolysis and are designed to retain their shape and electrochemical performance under operating conditions. The technology is relevant to chlor-alkali plants, water-treatment applications, and other processes requiring durable anodes with controlled catalytic behavior.
Water treatment · 2015
Water-treatment and disinfection systems
De Nora’s water business applies electrochemical methods to treatment, disinfection, and filtration. These systems are intended for industrial and infrastructure applications and build on the company’s experience with electrodes and controlled chemical reactions. The water-treatment portfolio became a distinct area of activity from 2015 onward.
Green hydrogen
Alkaline-water-electrolysis systems
De Nora supplies electrode and electrolysis technologies relevant to alkaline hydrogen production. These systems use electricity to split water and are intended for large-scale projects producing hydrogen with renewable power. The offering extends the company’s industrial electrochemical capabilities into the energy-transition market.
Brand decisions
2022
List the company on the Italian Stock ExchangeOtherBackground
After decades as an international industrial technology company, De Nora pursued public-market access.
Action taken
Industrie De Nora was listed on the Italian Stock Exchange.
Aftermath
The listing made the company publicly traded and increased the transparency associated with its corporate reporting.
Revenue and net income. Revenue €852.826 million; net income €89.665 million (Fiscal year 2022)
2021
Supply electrolysis systems for the NEOM hydrogen projectProduct launchBackground
The NEOM project in Saudi Arabia required large-scale electrolysis capacity for a planned green-hydrogen facility.
Action taken
De Nora’s joint venture with ThyssenKrupp was awarded the supply of the required electrolysis systems.
Aftermath
The award positioned De Nora’s electrochemical and electrode technologies within a major international green-hydrogen development.
2015
Enter water treatment and filtrationStrategyBackground
De Nora sought to apply its established electrode and electrochemical capabilities beyond traditional industrial process markets.
Action taken
The company began operating in water treatment and filtration.
Aftermath
Water treatment became one of the company’s principal business areas alongside industrial applications and energy-transition technologies.
Recent events
- Unconfirmed
De Nora announces plans for a Saudi Arabia office[3]
De Nora announced that it is setting up a localized office in Saudi Arabia, which it said will become operational later that year.
- Unconfirmed
De Nora to sponsor desalination innovation conference[3]
De Nora said it will sponsor the International Specialty Conference on Innovation in Desalination, scheduled for May 30 through June 1 in Jeddah, Saudi Arabia.
De Nora completes acquisition of UV Technologies Division[4]
De Nora announced that it had formally completed its acquisition of Calgon Carbon Corporation’s UV Technologies Division, covering products, brands and assets including Hyde Marine, RAYOX, SENTINEL and C3 SERIES UV.
Reported
De Nora signs acquisition of Hyde Marine assets[5]
De Nora said it signed an agreement on June 7 to acquire Calgon Carbon Corporation's UV Technologies Division, including Hyde Marine's products, brands and assets. The acquisition was expected to close on July 1.
- Unconfirmed
Reported
Snam acquires a minority stake in De Nora[6]
Snam acquired the 32.6% minority stake in De Nora previously held by Blackstone, becoming a De Nora shareholder. The source gives no calendar date for the completed acquisition.
- Unconfirmed
thyssenkrupp expands electrolysis-cell production capacity to one gigawatt annually[7]
thyssenkrupp reported that it had expanded production capacity for electrolysis plants and could produce electrolysis cells with total output of up to one gigawatt annually, together with strategic supplier and joint venture partner De Nora.
Sources8 sources
- 1De Noraen.wikipedia.org
- 2De Nora official websitedenora.com
- 3De Nora宣布计划在沙特阿拉伯设立办事处wateronline.com
- 4De Nora 完成收购 UV Technologies Divisionhellenicshippingnews.com
- 5迪诺拉签署收购海德海事相关资产的协议marinelink.com
- 6Snam收购迪诺拉少数股权prnasia.com
- 7thyssenkrupp将电解槽年产能扩大至一吉瓦chemicalonline.com
- 8De Nora Sponsors SWCC IDA Innovation Conferencewwdmag.com
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