Ion-exchange was for many years the only practical way to separate the rare earths in large quantities.

The interest from the water-treatment aspect is that the cat ion-exchange can be reversed.

The technique has proven to be superior over ion-pairing and ion-exchange for many applications.

The fluid is then recovered and uranium is extracted at a central plant using ion-exchange.

It would be difficult to construct a more misleading description of zeolite ion-exchange selectivity!

Ultrafiltration and ion-exchange can also be used to separate lignosulfonates from the spent pulping liquid.

High-pressure boilers typically require water demineralized by distillation or ion-exchange.

It is based on liquid-liquid extraction ion-exchange.

Newer ion-exchange and solvent-extraction techniques have led to easier separation of the rare earths, which has yielded much lower costs for thulium production.

Base hydrolysis removes the acetyl protecting groups, giving the desired product (4) after removing the cryptand via ion-exchange:

Thulium is principally extracted from monazite ( 0.007% thulium) ores found in river sands, through ion-exchange.

It is commercially extracted via ion-exchange from monazite sand (0.05% holmium) but is still difficult to separate from other rare earths.

However, a further saturation of solution with silica impedes hydrolysis and causes the glass to return to an ion-exchange, e.g. diffusion-controlled regime of corrosion.

The hydrogen form of zeolites (prepared by ion-exchange) are powerful solid-state acids, and can facilitate a host of acid-catalyzed reactions, such as isomerisation, alkylation, and cracking.

Due to the expense of this method, relative to counter-current solvent extraction, ion-exchange is now used only to obtain the highest purities of lanthanide (typically greater than 4N, 99.99%).

There are some ion-exchange resins that do remove organic ions, such as MIEX (magnetic ion-exchange) resins.

Trademarked CIM, BIA Separations has since introduced full lines of reversed-phase, normal-phase, ion-exchange, and affinity polymeric monoliths.

The protein binding principles in EBA are the same as in classical column chromatography and the common ion-exchange, hydrophobic interaction and affinity chromatography ligands can be used.

Treatment of water utilizing the principle of ion-exchange, whereby the calcium and magnesium ions in water were interchanged with sodium from a solid medium, started with the use of natural zeolites, complex hydrated silicates.

To be precise, dealkalization does not generally involve the outright removal of alkali from the glass, but rather its replacement with protons (H) or hydronium ions (HO) in the structure through the process of ion-exchange.

In brief, the PUREX process is a liquid-liquid extraction ion-exchange method used to reprocess spent nuclear fuel, in order to extract primarily uranium and plutonium, independent of each other, from the other constituents.

I have found out that in Great Britain, a water softener has to be installed in accordance with the current "British Water Code of Practice for Salt Regenerated Ion-Exchange Water Softeners for Direct Connection to the Mains Water Supply".

The mechanism is well known to chemists as ion exchange.

In the energy sector, the business division is an ion exchange specialist.

For many years he worked as assistant professor on fundamentals of ion exchange.

There is a constant ion exchange between living cells and a fluid.

Ion exchange can recover metals and clean water for recycling.

It was not isolated in pure form until the recent advent of ion exchange techniques.

This maximizes the ion exchange and/or membrane performance that follow in the system.

He is regarded as the founder of China's industry for ion exchange resins.

If you include activated carbon and ion exchange, then filtration does a pretty good job.

Actually I am not sure all 3 H+ ions exchange like that.

A wet route of gallium removal, using ion exchange, is also possible.

Ion exchange and activated alumina have been considered but not commonly used.

The hardness of water may be altered or treated by using a chemical ion exchange system.

Industrial and analytical ion exchange chromatography is another area to be mentioned.

Precipitation, cementing agents, and ion exchange are a few examples.

A water softener works on the principle of 'ion exchange'.

Another extraction mechanism is known as the ion exchange mechanism.

Because steam is usually low in total dissolved solids, your ion exchange costs are also reduced.

The purported processes are not at all related to ion exchange or de-ionization.

He was responsible for seminal discoveries in coagulation and ion exchange.

Ion Exchange has long been used as a water-softening process, although usually on a single-home basis.

Through an ion exchange process, the resin beads attract uranium from the solution.

It can be used for ion exchange resins.

Alternately, an acidic ion exchange resin can be used as the catalyst.

Radium can be removed by ion exchange, or by water conditioning.