Anion exchange resin is a basic group-containing ion exchange resin in the molecule. In water or a polar solvent capable of swelling in water with a basic, anion exchange solution in its non-metallic ion or hydroxide ion. A resin containing hydroxide ions according to the size of the ionization constant, into strong alkaline, alkaline and alkaline medium categories. Strongly basic anion exchange resin, mainly a quaternary ammonium group-N (CH3) 3OH resin molecule. Weakly basic anion exchange resin, there phenylenediamine - formaldehyde resin, melamine - formaldehyde resin guanidine. First, the basic concept of ion exchange (ion exchange process) is a reversible chemical reaction in the liquid phase and the solid phase ions for the ions, when the ions in the liquid phase of some of the more preferred solid ion exchange , will be a solid ion exchange adsorption, an aqueous solution in order to maintain electrical neutrality, the ion release must be equivalent to the ion exchange solid back in solution. Said resin consisting of medium or tetraethylenepentamine and epichlorohydrin resin, the strength of the resulting mixture of anion exchange. Anion exchange treatment (such as water softening, desalination, etc.) resins can be used in water, wastewater harmful anions (such as cyanide ion, thiocyanate ions, etc.) removed, amino acids, vitamin C, tartaric acid separation and extraction of rare elements . Second, the classification introduced exchange capacity anion exchange resin can be divided according to their exchange capacity characteristics: a strong base anion exchange resin: mainly containing a reactive group such as a strong functional groups having a tetrahedral ammonium-N + (CH3) 3, In the hydrogen form,-N + (CH3) 3OH-hydroxide ions can be released rapidly, in order to be exchanged, strong base anion exchange resin and anion exchange all removed. Such as sulfonic acid group-SO3H, readily dissociate H + in the solution, the strongly acidic. Resin dissociation contained in the main body of negative groups, such as SO3-, can be combined with the adsorption of other cations in solution. Both of these reactions in the resin and the exchange of H + in the solution of the cation. Strongly acidic resin are strong dissociation, can produce dissociation and ion exchange in an acidic or alkaline solution. Resin in use for some time, to be regenerated, which uses chemicals to make ion exchange reaction in the opposite direction, so that the resin functional groups revert to their original state in order for re-use. As described above with a strong acid cation resin is regenerated, generally using 1:10 diluted hydrochloric acid cleaning, then releasing the cation resin is adsorbed and then combined with H + to restore the original composition. (2) a weak base anion exchange resins: These resins containing weakly acidic groups such as carboxyl group-COOH, can dissociate the H + in the acidic water. The remaining resin after dissociation negative groups, such as R-COO-(R is a hydrocarbon group) can be combined with the absorption of other cations in solution, resulting in cation exchange. I.e. such a resin acid dissociable weak, and dissociation is difficult to ion exchange at low pH, only (eg pH5 ~ 14) acts in an alkaline, neutral or acidic solution. Such resins are also used acid regeneration (easier than the strongly acidic resin regeneration) such as amino acids can only remove the anions such as SO42-, Cl-or NO3-, for HCO3-, CO32-, or SiO42-it can not be removed . 3 General sequential adsorption of anions and strong base anion resin adsorption of inorganic acid is: SO42-> NO3-> Cl-> HCO3-> general order OH-weak base anion resin adsorption of anions as follows: OH -> citrate 3 -> SO42-> tartrate 2 -> oxalate 2 -> PO43-> NO2-> Cl-> acetate -> HCO3-three, uses an anion exchange resin [1] is mainly used for water, Preparation of high water, wastewater treatment, extraction of biological products, radioactive elements extracted, antibiotics and hydrometallurgical separation of tungsten, molybdenum extraction. For example: industrial water treatment, power plant water softening, high pure water, desalination de lye preparation, condensate treatment, industrial wastewater treatment and other fields. Fourth, note 1, to keep the moisture ion exchange resin contains some moisture, not open storage, storage and transportation process should be kept moist, so dry dehydration, crushing the resin, the resin during storage such as dehydration, and should be treated with concentrated salt water (25%) soaked, and then gradually diluted, may not be directly into the water, avoid rapid expansion of resin and crushed. 2, to maintain a certain temperature in winter storage and use, should be kept at a temperature of 5-40 ℃ environment, avoiding hot or cold, affect the quality, if there is no insulation in winter equipment, resin can be stored in salt water, salt water concentration According to the temperature dependent. 3, the ion exchange resin to remove impurities in industrial products, often contain a small amount of low polymer and the unreacted monomers, also contains iron, lead, copper and other inorganic impurities, when the resin with water, acid, alkali or other solution into contact , these substances will be transferred to the solution, affect water quality, so the new resin must be pretreated before use, usually the first full expansion of the resin with water, and then, on which the inorganic impurities (mainly iron compounds) available 4 -5% dilute hydrochloric acid was removed, and the organic impurities 2-4% dilute sodium hydroxide solution used was removed to near neutral to wash. As used in the pharmaceutical preparation must be soaked with ethanol treatment. 4, regular activation resin in use to prevent and metals (such as iron, copper, etc.) oil, organic molecular microbiology, strong oxidizing agents, such as contacts, free ion exchange capacity reduced, or even loss of function, therefore, must be carried out according to the situation of the resin unscheduled activation, activation method according to the pollution situation and conditions, are generally susceptible to Fe cation resin softening pollution available in hydrochloric acid soak, then gradually diluted organic anion resin vulnerable to contamination, can be 10% NaC1 +2- 5% NaOH mixed solution soak or rinse, a 1% hydrogen peroxide solution soak a few minutes, if necessary, other, alternative treatment method can be applied acid, bleaching treatment, alcohol treatment and various sterilization methods and so on. 5 Pretreatment Pretreatment Resin Resin: Ion exchange resins in industrial products, often contain small amounts of oligomers and unreacted monomers, also contains iron, lead, copper and other inorganic impurities. When the resin in contact with water, acids, bases or other solution into the solution of these substances will affect the water quality. Therefore, the new resin is pretreated before use. Usually the resin swelling with water, and then, on which the inorganic impurities (mainly iron compound) was removed with dilute hydrochloric acid used at 4-5%, 2-4% of organic impurities can be used in dilute sodium hydroxide solution to a near neutral wash i.e. removed available. 6, numerical model specified 110 * weak acid cation exchange resin acrylic-COOH (a) ≥ 12 (H-type) (b) ≥ 4 (H-type) (U.S.) Amberlite IRC-84 water treatment, wastewater treatment and nickel plating pharmaceutical industry. D151 * macroporous weak acid cation exchange resin, acrylic-COOH (a) ≥ 9.5 (H-type) (b) ≥ 3 (H-type) (U.S.) Amberlite IRC-72 water treatment, pharmaceutical industry, food and sugar industries. D152 * macroporous weak acid cation exchange resin, acrylic-COOH (a) ≥ 9.5 (H-type) (b) ≥ 3 (H-type) (France) Duolite C-464 water treatment, waste acid neutralization, pharmaceutical, food system sugar. D113 * macroporous weak acid cation exchange resin, acrylic-COOH (a) ≥ 10.8 (H-type) (b) ≥ 4.2 (H-type) (Germany) Lewatit CNP 80 water and wastewater treatment, recycling of precious metals, antibiotics purification separation. DLT ** macroporous styrene phosphonic acid resin-CH2PO (OH) 2 (a) ≥ 7.0 (b) ≥ 2.4 - except in the concentration of iron ions, ferric ion selectivity. + All exchange capacity: (a) mmol / g (dry) (b) mmol / ml (wet) * resin structure: Acrylic-DVB ** resin structure: DLT: Sryrene-DVB procurement anion exchange resin need help, please call 0371 -60,263,358 Tel: 18337183918 Zhengzhou Tianhe water purification materials Limited committed to provide you the best quality products and the most sincere service. 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