Ion-exchange membrane in the chlor-alkali industry


In the chlor-alkali industry, the use of ion-exchange membrane electrolyzers to produce sodium hydroxide has become a common practice. However, this membrane method requires that the content of calcium and magnesium ions in the brine into the tank be less than 20ppb. The old refining method can only reduce the content of calcium and magnesium ions in the brine to about 1 ppm.


In order to meet the requirements of the ion-exchange membrane process for the secondary brine, Sunresin has developed its proprietary Uniform Particle Size chelating resinMonojet LSC-7500, which can reduce the calcium and magnesium ion content to less than 5 ppb.


The Monojet LSC-7500 chelating resin does not only lower the calcium and magnesium ions to less than 5 ppb, but can also significantly remove other ions such as barium, strontium, aluminum, and iron. 


This video features the production site of a major titanium dioxide production enterprise group in Asia. 


This set of 200,000 tons of ion-exchange membrane caustic soda has been in operation for over 2 years with high processing accuracy and stable operating data. The cell voltage has been maintained at the same level as the start-up level 2 years ago, and the current efficiency has remained above 97% ensuring long-term stable operation. 

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Modern biopharmaceutical technologies typically use biological microbial fermentation...
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Purification of chemical compounds has become a vital part of most industrial processes.
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Latest News
2024 01
 Sunresin has been selected for the Hang Seng China A Specialised & Sophisticated 50 Index
On January 22, Hong Kong's Hang Seng Index Company launched the "Hang Seng China A Specialised & Sophisticated 50 Index", and Sunresin (300487.SZ) was successfully selected as a constituent stock. As of January 12, 2024, the proportion was 2.78%.
2023 11
 Sunresin Participates in Morgan Stanley 22nd Annual Asia-Pacific Summit
Sunresin, a leading technology company, was invited to attend Morgan Stanley's 22nd Asia-Pacific Summit in Singapore from November 15th to 16th. This summit is a pivotal conference for institutional investors in the Asia-Pacific region.
2023 11
 Sunresin won the 2023 Forbes Asia Top 200 and was invited to attend the award ceremony
On November 21, the Forbes Asia Best Under A Billion Forum & Awards Dinner was held in Manila, Philippines. We are proud to announce that Dr. Gao Yuejing, chairwoman of Sunresin, has been invited to attend the award ceremony and has received for the second time this honor since 2020.

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