博文

Ion-exchange membrane in the chlor-alkali industry

图片
  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 resin ,  Monojet 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-ex
发表评论
阅读全文

Lithium Extraction From Brine Lake

图片
In 2019, the total lithium production capacity of Qinghai Salt Lake is expected to reach 110,000 tons. According to the "Qinghai 100 billion lithium battery industry development plan", by 2020, Qinghai plans to produce more than 78 billion yuan of lithium battery industry, and by 2025 it will reach more than 180 billion yuan. Because of its low lithium content and high magnesium content,  lithium extraction from lean ore brine was considered difficult to realize whether from aspect of the technical breakthrough or economical profit, unbalanced in input and output. Sunresin has cooperated with Shaanxi Membrane Separation Technology Research Institute Co., Ltd. to overcome this technology and undertake the commissioning of Qinghai lean ore brine 100t/a lithium carbonate project. The EPC project has entered the normal operation stage and has produced high-purity lithium carbonate. The technology adopts the combination of adsorption separation and membrane separation, could real
发表评论
阅读全文

Basic Type of Ion Exchange Resin

图片
According to "The Structure of Ion Exchange Resin " section, the functional group of the resin determines the properties and uses of the resin, so the classification of the resin and the functional groups are classified:   1. Strong acid cation exchange resin SAC-sulfate group-SO3H SAC is capable of dissociating H+ and exhibit strong acidity, could be cation exchanged at any pH, and regenerated with acid.   2. Weak acid cation exchange resin WAC- carboxyl -COOH WAC is capable of dissociating H+ and exhibit weak acidity. It can be cation exchanged in alkaline, neutral or slightly acid solutions, and generally regenerated with acid.   3. Strong base anion exchange resin SBA - quaternary ammonium-NR3OH SBA is highly alkaline due to dissociation OH- in water. It can be anion exchanged at any pH, and are typically regenerated with NaOH.   4. Weak base anion exchange resin WBA- primary amine-NH2, secondary amine-NHR, Tertiary amine-NR2 WBA can dissociate OH- in water and shows wea
发表评论
阅读全文