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Weak base anion exchange resin

Weak base anion exchange resin

Weak Base Anion(WBA) resins are polymer made by polymerizing styrene or acrylic acid and divinylbenzene and chlorination,amination . Dongli company can provide gel and macroporous types WBA resins with different crosslink. Our WBA are available in many gradings including Cl forms, uniform size and food grade.

GA313,  MA301, MA301G, MA313

Weakly basic anion exchange resin: this kind of resin contains weakly basic groups, such as primary amino group (also known as primary amino group) – NH2, secondary amino group (secondary amino group) – NHR, or tertiary amino group (tertiary amino group) – NR2. They can dissociate Oh – in water and are weakly basic. In most cases, the resin adsorbs the whole other acid molecules in the solution. It can only work under neutral or acidic conditions (such as pH 1-9). It can be regenerated with Na2CO3 and NH4OH.


Product Detail

Product Tags

Strong Base Anion Resins

Resins Polymer Matrix  Structure                   Physical Form Appearance FunctionGroup Ionic Form Total Exchange Capacity meq/ml   Moisture Content Particle Size mm SwellingFB→Cl Max. Shipping Weight g/L
MA301 Macroporous Ploy-styrene with DVB Opaque White Spherical Beads Tertiary Amine Free Base 1.4 55-60% 0.3-1.2 20% 650-700
MA301G Macroporous Poly-Styrene with DVB White Spherical Beads Tertiary Amine Cl- 1.3 50-55% 0.8-1.8 20% 650-690
GA313 Gel type Poly-acrylic with DVB Transparent Spherical Beads Tertiary Amine Free Base 1.4 55-65% 0.3-1.2 25% 650-700
MA313 Macroporous Poly-acrylic with DVB White Spherical Beads Tertiary Amine Free Base 2.0 48-58% 0.3-1.2 20% 650-700
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Impurity Removal
The industrial products of ion exchange resin often contain a small amount of low polymer and non reactive monomer, as well as inorganic impurities such as iron, lead and copper. When the resin is in contact with water, acid, alkali or other solutions, the above substances will be transferred into the solution, affecting the quality of effluent water. Therefore, the new resin must be pretreated before use. Generally, water is used to make the resin fully expand, and then, The inorganic impurities (mainly iron compounds) can be removed by 4-5% dilute hydrochloric acid, and the organic impurities can be removed by 2-4% dilute sodium hydroxide solution. If it is used in pharmaceutical preparation, it must be soaked in ethanol.

Periodic Activation Treatment
In the use of resin, it is necessary to prevent contact with oil pollution, organic molecular microorganism, strong oxidant and other metals (such as iron, copper, etc.) so as to avoid reducing ion exchange capacity or even losing function. Therefore, the resin must be activated irregularly according to the situation. The activation method can be determined according to the pollution condition and conditions. Generally, the cation resin is easy to be polluted by Fe in softening by hydrochloric acid immersion, Then dilute gradually, the anion resin is easy to be polluted by organic matter. It can be soaked or washed with 10% NaCl + 2-5% NaOH mixed solution. If necessary, it can be soaked in 1% hydrogen peroxide solution for several minutes. Other, can also use acid-base alternate treatment, bleaching treatment, alcohol treatment and various sterilization methods.

New Resin Pretreatment
Pretreatment of new resin: in industrial products of ion exchange resin, there are a small amount of oligomers and monomers that do not participate in the reaction, and also contain inorganic impurities such as iron, lead and copper. When the resin contacts water, acid, alkali or other solution, the above substances will be transferred into the solution, which will affect the quality of the effluent. Therefore, the new resin must be pre treated before use. Generally, the resin will expand with water, and then the inorganic impurities (mainly iron compounds) can be removed by 4-5% dilute hydrochloric acid, and the organic impurities can be removed by 2-4% dilute sodium hydroxide solution to be washed to near neutral.


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