# Retention time in a liquid-liquid vessel

## Input(s)

\(\mu\): Viscosity of Predominant Phase \((\mathrm{cP})\)

A: Separator Constant - varies from 0.05 to 1.0 (dimensionless)

\(\gamma_{\mathrm{b}}\): Specific Gravity of Bottom Phase (dimensionless)

\(\gamma_{\mathrm{t}}\): Specific Gravity of Top Phase (dimensionless)

## Output(s)

\(\mathrm{T}\): Retention Time \((\mathrm{h})\)

## Formula(s)

\[
\mathrm{T}=\frac{\mathrm{A} * \mu}{\gamma_{\mathrm{b}}-\gamma_{\mathrm{t}}}
\]

## Reference(s)

John M. Campbell, Gas Conditioning and Processing, Campbell Petroleum Series, Oklahoma, 1992, Vol. 2, Page: 87.