# Laboratory data on the interfacial tension, viscosity, and density of two naphthenic acids in n-hexadecane across varying temperatures and concentrations

## TL;DR

This study measures how two naphthenic acids in n-hexadecane affect oil-brine interfacial tension, viscosity, and density at different temperatures and concentrations.

## Contribution

New experimental data on interfacial tension, viscosity, and density of naphthenic acid solutions in n-hexadecane under varying conditions.

## Key findings

- Interfacial tension measurements were taken using the pendant drop method across temperatures and concentrations.
- Viscosity and density data were collected using rotational viscometry at different temperatures.
- Results show how acid concentration and temperature influence oil-brine interfacial properties.

## Abstract

This paper presents oil-brine interfacial tensions measured using the pendant drop method at temperatures ranging from T = 25.0 to 60.0°C. Test oils were solutions of stearic acid or cyclohexanepentanoic acid in n-hexadecane at concentrations ranging from 0 to 2200 mg/L; the test brine was 5 wt.% NaCl and 1 wt.% KCl in deionized water for all measurements. Also presented are viscosity and density measurements by rotational viscometry at temperatures ranging from T = 20.0 to 80.0°C.