Strong Base Anion Resin

Strong Base Anion Resin List

Strong base anion exchange resins refer to a type of ion exchange resin containing strong reactive groups such as quaternary ammonium salt N+(CH3)3. This type of ionic resins can dissociate OH- in water to be strongly alkaline. The dissociated resins contain positively charged groups that can adsorb and combine with the anions in the solution to produce anion exchange reaction. Due to the strong dissociation, the strong base anion exchange resins can work normally under different pH. They can be regenerated with a strong base (such as NaOH).

Researches

Strong anion resins can remove linoleic acid from aqueous ethanol.Natural antioxidants such as linoleic acid contained in soybean oil have properties that prevent cardiovascular disease and cancer. A portion of this nutritional value is lost during the oil refining process due to trans-isomerization of fatty components or evaporation and degradation of nutrients. Oil deacidification by solvent extraction with an aqueous ethanol solution maintains the quality of the final product and reduces the loss of nutraceutical components. However, the solvents required in the liquid-liquid extraction process have been little studied. Adsorption of linoleic acid from the extracted phase using a strong base anion exchange resin allows solvent recovery for a new deacidification step.( Cren E C, et al., 2010) The use of strong base anion exchange resin can also separate thorium and uranium in nitric acid solution. Traditional fuel reprocessing processes use organic solvent extraction to separate and recover thorium and uranium. The liquid-liquid extraction process generates a large amount of secondary waste and requires large-scale extraction equipment. Ion exchange technology has been applied to fuel post-processing due to its simple operation, no organic solvents, and compact equipment. It has a history of more than 70 years. Fig. 1 shows a schematic diagram of the column apparatus. The anion exchange resin is injected into the column in a slurry state. The resin is conditioned by allowing the nitric acid solution to pass through the column prior to performing the column experiments. The feed solution flows into the column at a constant flow rate. Then, the eluent containing nitric acid and distilled water was successively provided to the column. The effluent from the column is recovered with a 2.5 ml or 5 ml automatic fraction collector.

Fig. 1. Schematic diagram of the column apparatus for column experiments. ( Chen Y, et al., 2016)

Typical Applications

• Hard water softening
• Ion removal
• Extraction of rare elements
• Separation of amino acids, citric acid, etc.
• Catalytic

References

1. Cren E C, et al. Adsorption Isotherms for Removal of Linoleic Acid from Ethanolic Solutions Using the Strong Anion Exchange Resin Amberlyst A26 OH[J]. Journal of Chemical & Engineering Data, 2010.
2. Chen Y, et al. Separation of thorium and uranium in nitric acid solution using silica based anion exchange resin[J]. Journal of Chromatography A, 2016.