The American publication Chemical & Engineering News (C&EN) recently published its 2025 ranking of the world’s top 50 chemical companies, with enterprises from China, the United States, Japan, Germany, the United Kingdom and Korea on the list. As a heat exchanger brand with many years in the chemical industry, Nexson maintains deep cooperation with a number of these global leaders, serving more than 80% of the top names.
Nexson (Beijing) successfully delivered several special-material plate heat exchangers to one of these top-15 chemical majors for its HCl catalytic oxidation chlorine production unit. The delivered equipment matches material selection, structural design and process requirements precisely against the media characteristics and duty conditions of each stage — a full demonstration of Nexson’s professional capability in delivering heat exchange solutions for complex processes.
Catalyst neutralisation wastewater cooling duty
In this duty the process medium contains high-concentration sodium chloride and a small amount of solid impurities, with inlet temperature above 100 °C, carrying both chloride corrosion risk and particle deposition risk. The plate heat exchangers Nexson supplied use Hastelloy C276, with an optimised inter-plate channel design that intensifies heat transfer while reducing impurity deposition — fully meeting the demanding requirements of the duty.
Tail gas decomposition tower and neutralisation tower cooling duty
Here the process medium is an alkaline solution containing sodium hydroxide, sodium hypochlorite and sodium bicarbonate. Under the combined action of strong oxidation from sodium hypochlorite and the alkaline environment, the corrosion resistance requirements on materials are very specific. For this duty Nexson supplied plate heat exchangers in Hastelloy C276 and titanium-palladium alloy (Ti Gr11), with a symmetrical channel design ensuring uniform flow distribution and avoiding local overheating inside the unit that would cause material corrosion, guaranteeing good service life.
Drying tower cooling duty
Here the medium is high-concentration sulfuric acid (78%) containing chloride ions — strongly oxidising and extremely corrosive. The delivered equipment uses Hastelloy C276 with corrosion-resistant Viton G fluoroelastomer gaskets, and a narrow channel design that intensifies heat transfer, meeting the customer’s heat exchange requirements perfectly while keeping both plates and gaskets corrosion resistant.
These special-material plate heat exchangers were designed specifically in material and process terms, effectively resolving the technical conflict between “corrosion – scaling – heat transfer efficiency” in HCl catalytic oxidation chlorine production, and providing a referenceable technical path for equipment selection in similar processes. Nexson’s ability to deliver solutions for complex duties and specific requirements also earned strong recognition from the customer.
As one of Nexson Group’s core global manufacturing bases, Nexson (Beijing) has always put technology at the centre and customer satisfaction as the foundation. Relying on a localised supply chain and cross-border technology integration capability, and continuously optimising material selection and structural design for special-material heat exchangers, it provides customised solutions to customers. Going forward, Nexson China will keep focusing on high-efficiency heat exchange solutions under special duties, meeting industry demand for efficient, stable and long-cycle equipment through precisely matched technical schemes, and supporting safe industrial upgrading and efficiency gains.
