Wax is a collective name for a series of natural or artificial recovered substances. The crystalline waxes with a paraffin base recovered from crude oil are now the most important. They result from the production of lubricating oil, where they are looked upon as an unwanted contaminant. Regarded by the refineries as a waste product, the so-called slack waxes find ready acceptance in the wax industry.
Slack Wax is produced during the production of Group I base oil. During production of Group I base oil, the feedstock firstly has to go through solvent extraction process to remove aromatics and the resultant product is called raffinate. The raffinate is then diluted with solvent like methyl-ethyl ketone (MEK) to lower its viscosity to improve low-temperature filterability. The diluted oil is then chilled to -10°C to -20°C. Wax crystals will form, precipitate and removed by filtration. The removed wax becomes Slack Wax.Slack wax 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 petroleum wax products.
Slack waxes are minimally refined high oil products with the range from 55°C to 65°C in melting point and oil content ranges from 3.0% to as much as 11%.
Lab Test on Slack Wax to Check Quality
Characteristic | Test Method |
---|---|
Kinematic Viscosity @ 100 oC | ASTM D-445 |
Oil Content | ASTM D-721 |
Density @ 15.6 oC | ASTM D-4052 |
Flash Point | ASTM D-92 |
Color @ 70 oC | ASTM D-150 |
Congealing Point 0 oC | ASTM D-938 |
Heavy Slack Wax 2 to 12% | |||||
Characteristic | Test Method | Result | |||
---|---|---|---|---|---|
Grade | – | H-05 | H-08 | H-10 | H-12 |
Kinematic Viscosity @ 100 oC | ASTM D-445 | 5.5-7.5 | 5.5-7.5 | 5.5-7.5 | 5.5-7.5 |
Oil Content | ASTM D-721 | 2-5 | 5-8 | 8-10 | 10-12 |
Density @ 15.6 oC | ASTM D-4052 | 810-840 | 810-840 | 810-840 | 810-840 |
Flash Point | ASTM D-92 | 240 | 240 | 240 | 240 |
Color @ 70 oC (max) | ASTM D-150 | 3 | 3 | 3 | 3 |
Congealing Point 0 oC (min) | ASTM D-938 | 60 | 60 | 60 | 60 |
Heavy Slack Wax 7 to 11% | ||
Characteristic | Test Method | Value |
---|---|---|
Kinematic Viscosity @ 100 oC ˚C | ASTM D445 | 6 – 7.5 |
Oil Content (%wt) | ASTM D721 | 7 – 11 |
Melting Point | ASTM D87 | 56 – 65 |
Color | ASTM D1500 | 1.5 |
Heavy Slack Wax 3 to 8% | ||
Characteristic | Test Method | Value |
---|---|---|
Kinematic Viscosity @ 100 oC ˚C | ASTM D445 | 3 – 6 |
Oil Content (%wt) | ASTM D721 | 3 – 8 |
Melting Point | ASTM D87 | 55 – 60 |
Color | ASTM D1500 | 0.5 – 3 |
Packing
- Bulk
- Iso tank
- 195 kg steel drum
- Jumbo bag