How to Make Paraffin Wax for Medical Supplements
Paraffin wax is a byproduct of petroleum oil. Industrial paraffin wax may contain some impurities like polycyclic aromatic hydrocarbon and heavy metal. It needs further refining when they are used for food or medical use. This text is about one refining method.
Our raw material is hydrogenated paraffin. Then we will use active material to effectively deodorize and decolorize and further reduce the oil content in the deoiling tank.
Refining process: add active material that are active carbon, diatomaceous earth and/or activated clay into the frame filter. Stir for 1-1.5 hour to form coating inside the frame filter. Then filter for 10-30 minutes at a temperature of 100-120 ℃.
Deoiling process: the deoiling tank is a multi-pipe continuous heating device. In the oil tank, the paraffin wax after the refining process is heated to a sweating temperature, which is lower than the melting point of paraffin wax by 2 ℃. This will make oil separated from the wax and rise to the surface of the wax. The whole process will be 3-6 hour and the oil content can reduce from 0.5% to 0.3%.
Take Paraffin wax 62 as an example. During the purification process, add 1.5% of activated carbon, 1.3% of diatomaceous earth, and stir for 1 hour. The temperature is ≤120 ℃ and filtration time is 10 – 30 minutes. The color number increases from 25 to 30.
In the deoiling tank, the temperature is raised to 60 ℃ for 6 hours. The oil content is reduced from 0.5% to 0.2%, of which the oil reduction rate is 52%. After these steps, we get fully refined paraffin wax, which can be used as medical supplements.