In the second case, only the extractant would remain inside the pores.

In this way the ligand is used as a recyclable extractant.

A mixture of an extractant in a diluent is used to extract a metal from one phase to another.

The contained extractant is supposed to enhance the capacity of the resin particles.

Usually, the extractant is an organic liquid.

In this approach, a liquid extractant is contained within the pores of (adsorption) particles.

A process based on a solvation extraction process using the triether extractant named above.

Depending on the pore size of the used particles, capillary forces may also play a role in retaining the extractant.

This is a liquid-liquid extraction process which uses methyl isobutyl ketone as the extractant.

If the wet method is used, the extractant is dissolved in an additional solvent prior to impregnation.

The extractant is able to diffuse to the edge faster than it can be carried away by the solvent, and the concentration profile is flat.

SIRs can be reused for different separation tasks by just rinsing one complexing agent out and re-impregnating them with another more suitable extractant.

However, the possible decrease of extractant loss depends largely on the pore size and the water solubility of the extractant.

In this system of solvent extraction, the hydrocarbons of the diesel act as the diluent while the di alkyl sulfides act as the extractant.

While during conventional liquid-liquid extraction the solvent and the extractant have to be dispersed, in a SIR setup the dispersion is already achieved by the impregnated particles.

Some laboratories analyze for all 13 mineral nutrients and a dozen non-essential, potentially toxic minerals utilizing the "universal soil extractant" (ammonium bicarbonate DTPA).

Figure 2 shows the stages during extraction from a spherical particle where at the start of the extraction the level of extractant is equal across the whole sphere (Fig. 2a).

Solvent impregnated resins (SIRs) are commercially available (macro)porous resins impregnated with a solvent/an extractant.

Reactive indicates that the extraction mechanism involves a reversible reaction between the extracted chemical species (the guests) and a host chemical species constituting, or present in, the extractant.

Lipid was extracted with a one-phase chloroform:methanol extractant, and fractionated into neutral lipid, glycolipid and polar lipid fractions with silicic acid.

Sodium carbonate solutions effectively strip uranium from the organic layer, but the sodium salt of DEHPA is somewhat soluble in water, which can lead to loss of the extractant.

This implies selecting a suitable extractant with low water solubility, which is sufficiently retained inside the pores, and selecting mechanically stable particles as a solid support for the extractant.

A small amount of a liquid organic extractant is spread as a thin layer and firmly held by capillary or other forces onto a matrix, made of a thin microporous material, whose surfaces are freely accessible from/to the outside.

In this approach, the particles are either contacted with a precalculated amount of extractant, which completely soaks into the porous matrix, or the particles are contacted with an excess of extractant.

The plant operation was resumed later and an R&D pilot plant has been commissioned for the production of Di-2-ethyl hexyl phosphoric acid (D2EHPA), an effective metal extractant, used for hydro-metallurgical recovery and the separation of various metals.

In the second case, only the extractant would remain inside the pores.

In this way the ligand is used as a recyclable extractant.

It is also extensively used as an extractant in biochemistry and cell biology.

The contained extractant is supposed to enhance the capacity of the resin particles.

Usually, the extractant is an organic liquid.

In this approach, a liquid extractant is contained within the pores of (adsorption) particles.

After soaking, the remaining extractant, which is not inside the pores, is evaporated.

The packed bed is then rinsed with the liquid extractant until inlet and outlet concentrations are the same.

Depending on the pore size of the used particles, capillary forces may also play a role in retaining the extractant.

A process based on a solvation extraction process using the triether extractant named above.

A fertilizer-based extractant was expected to reflect specific substrate–fertilizer interactions more closely than conventional laboratory extractants.

The solid polyurethane is equated to a liquid extractant of a moderate dielectric constant.

The additional modifier is supposed to enhance the penetration of the extractant into the particle pores.

SIRs are porous particles, which contain an extractant inside their pores.

The electrolyte solution usually contains traces of the organic extractant that exist as tiny droplets within it.

A soil test reading from Cornell University of 9 pounds per acre is a reading based on the extractant and procedures used.

The extractant, including the host, must be substantially insoluble in the processed aqueous solutions to avoid being washed away.

Figure 1 to the right explains the basic principle, in which the organic extractant E is contained inside the pores of a porous particle.

If the wet method is used, the extractant is dissolved in an additional solvent prior to impregnation.

This is a liquid-liquid extraction process which uses methyl isobutyl ketone as the extractant.

Furthermore, the solute S can react with the extractant to form a complex ES.

During wet impregnation, the porous particles are dissolved in the extractant and allowed to soak with the respective fluid.

The extractant is able to diffuse to the edge faster than it can be carried away by the solvent, and the concentration profile is flat.

The Morenci Jameson Cell consistently recovered over 82% of the organic extractant.

The flavour quality depended on the membrane type, extraction solvents and the conditions.

"We immediately put them in contact with the extraction solvent hexane.

The extraction solvent to be used is placed in a distillation flask.

We still haven't solved the problem of additives, flavouring and extraction solvents.

The Regulation is not applicable to food additives, flavourings or extraction solvents.

Calibration standards were prepared by further dilution of stock standard with extraction solvent (see section 2).

The Annex contains a list of authorized extraction solvents and conditions of use.

He used the extraction solvent ether.

EU rules govern the use of extraction solvents in the manufacture of foodstuffs or food ingredients.

Additives, flavourings, and extractions solvents were subject to alternate rules (EC, 1997a).

Member States must, however, ensure that the use of these substances does not result in dangerous levels of extraction solvent residue in foodstuffs.

DCM functions as a carrier or extraction solvent for the production of specific chemical products requiring high quality and purity.

Typical extraction solvents include 6% KOH in methanol.

Supercritical carbon dioxide is used as the extraction solvent for creation of essential oils and other herbal distillates.

If desired, an ultra-low standard may be prepared using 500 μL of the mixed secondary stock to 10 mL with extraction solvent.

For this reason, DESs were applied as extraction solvents for such material from their complex matrices.

The Directive lays down purity criteria for extraction solvents, e.g. they shall not contain a toxicologically dangerous amount of any substance.

Maximum tolerances for certain contaminants such as radioactive contamination, extraction solvents, pesticide residues have been established including:

Hence genetically modified organisms, food additives, flavourings, extraction solvents, enzymes, vitamins and minerals will be excluded from the Regulation.

Legislation is mostly in line with the acquis as regards labelling, presentation and advertising, additives and purity criteria and extraction solvents.

Clearly the reverse is true as well, using polar extraction solvent and a nonpolar solvent to partition a nonpolar interferent.

Member States shall authorize the use of extraction solvents listed in the annex to these Directives. They shall not authorize any others.

The economics of the process depend heavily on effective recycling of the quinone (which is expensive) and extraction solvents, and of the hydrogenation catalyst.

Meanwhile trialkyl esters such as tributyl phosphate (made similarly from butan-1-ol) are used as liquid-liquid extraction solvents in nuclear reprocessing and elsewhere.

Pure levulinic acid was isolated by evaporation of the extraction solvent and distillation of levulinic acid.