The global chlor-alkali industry is the silent engine of the modern chemical sector. From tap water purification to textile bleaching, from PVC production to pharmaceutical synthesis, caustic soda (NaOH), chlorine (Cl₂) and hydrogen (H₂) form the three cornerstones of industrial intermediates. The c...
The essence of a chlor-alkali electrolyzer is a precisely controlled electrochemical reactor. Direct current flows in through the anode and out through the cathode. Within an extremely narrow gap, brine is decomposed into chlorine gas, hydrogen gas, and caustic soda. Driving all of this are three pr...
Against the backdrop of increasingly strained global water resources and ever-tightening environmental regulations, Zero Liquid Discharge (ZLD) has become the ultimate goal of industrial wastewater treatment. It means that all water discharged from the system must be recovered and reused, with no li...
In chlor-alkali chemical production, Ca2+ and Mg2+ are the two most common and most harmful cationic impurities. Excessive calcium and magnesium ions enter the electrolyzer along with the refined brine and migrate toward the cathode under the electric field. They penetrate the carboxylic acid layer...
Manufacturing pharmaceuticals is essentially a series of chemical reactions. Take a typical antibiotic synthesis as an example: two raw materials react in a solvent to form the target molecule. However, when the reaction is complete, the vessel contains not only the target product but also a large a...
Electrodialysis (ED) is an independent membrane-based desalination pathway distinct from pressure-driven membrane technologies (RO/NF/UF/MF). Driven by an electric field, it achieves ion separation through the selective migration of ion exchange membranes, complementing rather than competing with RO...
Salt (NaCl) is dissolved in water, and direct current is applied. At the anode, yellow-green chlorine gas is released; at the cathode, hydrogen gas is produced, and sodium hydroxide (NaOH) forms in the solution. Overall reaction: 2NaCl + 2H₂O ⟶ 2NaOH + Cl₂↑ + H₂↑
This reaction does...
A Systematic Guide to Backwashing & Cleaning Strategies for Electrodialyzers
Electrodialysis (ED) technology, as an efficient and economical membrane separation process, plays an important role in industrial water treatment, material separation, and wastewater reclamation. However, during long-t...
Driven by the dual-carbon targets and national wastewater resource recovery strategy, industries are heavily investing in green transitions. Alongside zero liquid discharge (ZLD) for wastewater, adopting hydrogen fuel cell systems for clean energy has become another inevitable technical route for wa...
The electrolyzer is the core and critical equipment in chlor-alkali chemical production. It utilizes ion-exchange membrane electrolysis technology to electrolyze brine, producing key products such as caustic soda, chlorine gas, and hydrogen gas. Its operational stability and safety directly determin...
When it comes to industries focused on sustainable water management, chemical water treatment equipment really plays a vital role. I mean, David Smith, who’s pretty much an expert in water treatment tech, once said, “Quality equipment is the backbone of effective water treatment.”...
The ion-exchange membrane electrolyzer is the "heart" equipment of the membrane-based chlor-alkali process. It receives purified brine and produces three core products – caustic soda, chlorine gas, and hydrogen – through direct-current electrolysis. It directly determines the production...