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How does a cation-exchange resin work?

How does a cation-exchange resin work?

In a cation-exchange resin all the sites are negatively charged, so that only positive ions can be separated; an anion-exchange resin has positively charged sites. Ion-exchange chromatography has become one of the most important methods for separating proteins and small oligonucleotides.

What do you mean by cation-exchange resin?

: an ion-exchange resin that contains acidic groups for exchange cations — compare anion-exchange resin.

What is cationic exchanger?

: a cation-exchange agent that can exchange its cation with the cation or cations of a solution passed through it and that consists of an insoluble saltlike or acidic substance:as. a : a natural or synthetic zeolite.

What is cation-exchange resin give example?

Cation exchange resins are used in medicine to remove an excess of a particular positively charged ion that has accumulated in the body. When the resin is administered to the patient the positively charged ions binds to the resin in an exchange for another positive ion.

What is the difference between an anion exchange resin and a cation exchange resin?

Anion resins and cation resins are the two most common resins used in the ion exchange process. The difference between anion and cation resins is that one is positively charged (anion) and the other is negatively charged (cation). cation resins, which attract positive ions with their negative charge.

What is the formula of cation exchange resin?

Cation-exchange resin The cation exchange method removes the hardness of water but induces acidity in it, which is further removed in the next stage of treatment of water by passing this acidic water through an anion exchange process. Reaction: R−H + M+ = R−M + H+.

What is the functional group of cation exchange resin?

Strong acid cation (SAC) exchange resins. SAC resins are composed of a polystyrene matrix with a sulphonate (SO3–) functional group that is either charged with sodium ions (Na2+) for softening applications, or hydrogen ions (H+) for demineralization.

What is the other name of ion exchange method?

The terms ion exchange, deionization and demineralization are often used synonymously to refer to the same process. However, deionization and demineralization may be accomplished by technologies other than ion exchange (see reverse osmosis).

What is strong base resin?

The strongly basic anion exchange resin is an anion exchange resin with quaternary ammonium groups incorporated into the styrene frame. Two types with differing alkalinity strengths are: Type I with a trimethyl ammonium group, and Type II with a dimethylethanol ammonium group.

What is a weak cation exchange?

Weak cation exchange sorbents have surface functional groups such as carboxylic acids that are negatively charged at high pH, but neutral at low pH. Strong anion exchangers consist of quaternary ammonium groups that are ionized over the full pH range, and weak anion exchangers have primary, secondary,…

What is a cation exchange resin?

cation-exchange resin. any one of various insoluble organic polymers with high molecular weights that exchange their cations for other cations in solution. Cation-exchange resins are used especially to restrict intestinal sodium absorption in patients with edema. Compare anion-exchange resin.

What is an anion exchange resin?

Definition of anion-exchange resin. : an ion-exchange resin that contains basic chemical groups for exchanging anions In strongly alkaline mobile phases, sugar anions are separated on a positively charged strong anion-exchange resin.— Alfred Steinbach and Andrea Wille, Food Engineering & Ingredients, 1 Oct. 2008 — compare cation-exchange resin.