Methods

Solutions of solvent selection problems formulated above require a multistage approach (see Figure 3).

Table 4 Problem formulation for separation of phenol from wastewater

Target property

Target value

Partition coefficient (log P)

Solvent loss

Liquid density at 298 K

Normal boiling point

Vapour pressure at 360 K

Flash temperature

Selectivity

Capacity

Separation factor

Other properties

Must not form azeotrope with phenol Acceptable environmental properties

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