Classifications Of Extraction Water Damage

Distribution law or the partition can be formulated: If a substance is distributed between two solvents cannot mix, then at a constant temperature for each molecular species, there are a number of appeals a constant distribution between the two solvents, and the number of appeals this distribution does not depend on any other molecular species that may exist. Number of appeals price change with the nature of the solvent, the basic properties of dissolved substances, and temperature (Svehla, 1990).

This law in the form of a simple does not apply when a species is distributed it experienced dissociation or association in one of the phases. On the application of practical solvent extraction, especially if we note of dissolved substance fraction of total in phase one or the other, no matter how the ways of the dissociation, the Association or its interaction with other species-species solute. To make it easier, introduced the term the number of appeals D distribution (extraction coefficient or E).

If it doesn't happen, dissociation or Association on phase polymerization – the phase and the circumstances that we have are ideal, then the prices of KD is equal to D.For practical purposes as replacement price KD or D, the more commonly used term percent extraction (E). This relates to the comparison of distribution in the following equation.

D = where 
VW: water phase Volume

Vo: the Volume of the organic phase

When the volume of the organic phase, and the water is the same, namely Vo =VW, D is converted into:

D =

Quantitative extraction is considered when: E = 100 means

D = infinite (if Vo = VW)

Classification Of Extraction

Some of the ways it can classify the system of extraction. the classic way are classified based on the nature of the substance being extracted, as ion systems Association. Now the classification is based upon the extraction process. When the extraction of metal ions takes place, then the extraction process takes place with a particular mechanism.

The next known as extraction  through solvate because the disolvate extraction of species to the organic phase. The third extraction is a process that involves the formation of an ion pair. Extraction takes place through the establishment of the neutral species not charged in extraction to the organic phase. While the last category is a synergistic extraction. The name used mutually reinforcing effects of existence which resulted in the addition of extraction by utilizing solvent.

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