Residue wax, also known as foots oil or slack wax, is a type of wax that is produced as a byproduct during the refining of petroleum. It is considered a lower-grade wax due to its impurities and higher oil content compared to fully refined paraffin wax.
Residue wax is obtained from the residual fraction of the crude oil refining process. After the more valuable components such as gasoline, diesel, and lubricating oils are extracted, the remaining residue is subjected to further processing to obtain residue wax.
One of the primary characteristics of residue wax is its higher oil content. This oil content gives residue wax a softer and more pliable texture compared to fully refined paraffin wax. It also results in a lower melting point, typically ranging from 45 to 60 degrees Celsius (113 to 140 degrees Fahrenheit).
Due to its lower quality, residue wax is not commonly used in applications that require high purity and specific characteristics. However, it still finds use in certain industries and applications where its properties are suitable.
Residue wax is often utilized in the production of various wax-based products, such as wax blends, polishes, and coatings. Its soft and pliable nature makes it easier to mix with other materials and adjust the desired consistency and properties of the final product.
In the rubber industry, residue wax is used as a processing aid and release agent. It helps prevent rubber compounds from sticking to molds and processing equipment during the manufacturing process.
Additionally, residue wax can be used as a component in the production of certain types of candles, especially those that prioritize aesthetics over performance. Its lower melting point and softer texture make it easier to manipulate and create unique candle designs.
It’s important to note that residue wax may contain impurities and residual solvents, which can affect its suitability for certain applications.
Therefore, it is crucial to consider the specific requirements and standards of the intended application when using residue wax.
In summary, residue wax is a lower-grade wax obtained as a byproduct of the petroleum refining process. It has a higher oil content, softer texture, and lower melting point compared to fully refined paraffin wax. While it may not be suitable for applications that require high purity, residue wax finds use in the production of wax blends, polishes, coatings, and as a processing aid in the rubber industry.
Careful consideration should be given to its impurities and characteristics when selecting residue wax for specific applications.