Slack wax is created as a by-product of the oil refining process. This material is the crude wax produced by chilling and solvent filter-pressing wax distillate. It serves as feedstock and that is further refined and blended to create value-added wax products.
There are three types of slack wax, depending on the viscosity of the lubricating oil being dewaxed: low-neutral, medium-neutral, and heavy-neutral. Each of these have different melting points. Melting points of 50-52˚C are considered light grade and 53-55˚C are heavy grade, and their oil content ranges from 5.0% to as much as 35%.
Slack waxes offer a wide variety of physical and performance characteristics including:
- A wide range of melting points
- Blended and single distillate products
- High flash points
- High n-paraffin contents