Crosslinked Polymer With High Ionic Conductivity, Fluorine-containing Resin-Ion Exchange Membrane

Our company produce theIon exchange resin,The ion exchange resin is a kind of polymer material with ion exchange function. In solution, it can exchange its ions with the same ions in the solution.

What are the types of ion exchange resins?

According to the nature of the exchange groups, ion exchange resins can be divided into two categories: cation exchange resins and anion exchange resins.
Cation exchange resins mostly contain acidic groups such as sulfonic acid group (—SO3H), carboxyl group (—COOH) or phenol group (—C6H4OH), among which hydrogen ions can be exchanged with metal ions or other cations in solution. For example, a polymer of styrene and divinylbenzene is sulfonated to obtain a strongly acidic cation exchange resin. Its structural formula can be simply expressed as R-SO3H, where R represents the resin matrix, and its exchange principle is
2R-SO3H + Ca2 + (R-SO3 ) 2Ca + 2H +
This is also the principle of hard water softening.
The anion exchange resin contains basic groups such as quaternary amine group [-N (CH3) 3OH], amine group (—NH2) or imine group (—NH2). They can generate OH- ions in water, which can exchange with various anions. The principle of exchange is
R—N (CH3) 3OH + Cl- R—N (CH3) 3Cl + OH-
because the ion exchange is reversible, so used Ion exchange resin is generally washed with an appropriate concentration of an inorganic acid or alkali, and can be restored to its original state and reused. This process is called regeneration. Cation exchange resin can be rinsed with dilute hydrochloric acid, dilute sulfuric acid and other solutions; anion exchange resin can be treated with sodium hydroxide and other solutions for regeneration.
Ion exchange resins have a wide range of uses, mainly for separation and purification. For example, it is used to soften and produce deionized water, recover metals from industrial wastewater, separate rare and precious metals, and isolate and purify antibiotics.

Appearance:

white powder

Technical Specifications(Reference Standard):

Item	Index
Appearance	white powder
Initial decomposition temperature	>350 C
Resin Density	1.99g/cm3
Resin ion-exchange Capacity	940-1000g/eq
Acid Capacity	1.0 meq/g
Melting Point	180 C
Particle Diameter	2-10 um
Melting process temperature	280 C

The performance of ion exchange resin for ion exchange reaction is expressed in "ion exchange capacity", that is, the number of milligram equivalents of ions that can be exchanged per gram of dry resin or per milliliter of wet resin, meq / g (dry) or meq / mL (Wet); when the ion is monovalent, the number of milligram equivalents is the number of milligram molecules (for divalent or polyvalent ions, the former is the latter multiplied by the ion number). It also has three expressions: "total exchange capacity", "working exchange capacity" and "regenerative exchange capacity".
1. Total exchange capacity, which means the total amount of chemical groups per unit quantity (weight or volume) of resin that can carry out ion exchange reaction.
2. The working exchange capacity indicates the ion exchange capacity of the resin under certain conditions. It is related to the resin type and total exchange capacity, as well as specific working conditions such as the composition of the solution, the flow rate, and the temperature.
3. Regeneration exchange capacity, which represents the exchange capacity of the recycled resin obtained under a certain regeneration dose condition, and indicates the degree of regeneration and restoration of the original chemical groups in the resin.
Generally, the regeneration exchange capacity is 50-90% of the total exchange capacity (generally controlled 70-80%), and the working exchange capacity is 30-90% (for recycled resin). The latter ratio is also called Resin utilization.
In actual use, the exchange capacity of the ion exchange resin includes the adsorption capacity, but the proportion of the latter varies depending on the resin structure. At present, calculations have not been performed separately. In the specific design, it needs to be corrected based on empirical data and reviewed during actual operation.
The measurement of the ion resin exchange capacity is generally performed with inorganic ions. These ions are small in size, can diffuse freely into the resin, and react with all the exchange groups inside it. In practical applications, the solution often contains high-molecular organic compounds, which are large in size and difficult to enter the micropores of the resin, so the actual exchange capacity will be lower than the value measured with inorganic ions. This situation is related to the type of resin, the structural size of the pores, and the substance being processed.

Applications:

Perfluorinated Ion-Exchange Resin is widely used for preparation of ion exchange membranes, ion exchange membranes for fuel cells, ion exchange membranes for vanadium cells, ion membranes for chlor-alkali industries, hollow fiber membranes, supercatalysts used in organic synthesis, and ultra-stable ion exchangers