The base oil is opaque. I have observed it under various conditions, and the results are as follows; please help analyze them. Thank you
Thread Content
The base oil is a reverse-order product of the old three-series; both the product refined with furfural and that refined with clay are opaque. Treatment Methods, Observation Results, and ConclusionsTreatment Methods:
Open container at room temperature (beaker); Closed container at room temperature (ground-glass bottle); Closed container at room temperature with antifoaming agent.
Temperatures: 14–19°C, 14–19°C, 0.7%; Time: 48 hours.
Results: The upper layer became clear; there were suspended particles in the opaque areas. No change – remained cloudy. No change – remained cloudy.
After 90 hours: The sample was clear and transparent. Same as above. Same as above.
After 7 days: The sample was clear and transparent. No improvement. No improvement.
Conclusions:
The cloudiness is caused by the presence of high-melting-point substances or insoluble particles that can react with air. The cloudiness is not related to bubbles.
Treatment Methods:
Heat the container with an open lid and then store it at room temperature; Heat the container with a closed lid and then store it at room temperature.
Temperatures: 40°C, 40°C, 70°C; Heating time: 10 minutes.
Results: Clear and transparent. Clear and transparent. Clear and transparent.
At room temperature (14–19°C): 20 minutes – slightly cloudy, with a hazy appearance; Clear and transparent.
After 60 minutes: Cloudiness increased; the hazy appearance became more pronounced; Still clear and transparent.
After 4 hours: Semiclear. Semiclear. Clear and transparent.
After 24 hours: Semiclear. Semiclear, but worse than when the container was open; Slightly cloudy.
After 48 hours: The upper layer became clear; Semiclear, slightly better than the original sample; Slightly cloudy.
After 72 hours: Transparent. Transparent. Transparent.
Conclusions:
Treatment Method: Filter the heated sample using coarse filter paper in an oven.
Filtering temperatures: Room temperature, 40°C, 50°C, 70°C.
Results after filtering: Clear and transparent. Clear and transparent. Clear and transparent. Clear and transparent.
When stored at room temperature with an open lid (14–19°C): 1 hour – clear and transparent. 5 hours – clear and transparent. 24 hours – clear and transparent. 48 hours – clear and transparent. 72 hours – clear and transparent.
Conclusions:
The cloudiness of the sample is not related to its wax content
The reasons behind the opacity of the base oil have not been clearly analyzed. I have discovered a method that can make the oil transparent in a short time; feel free to contact me at QQ35589518 if you need it
Water: less than 100PPM, inorganic impurities. It has now been basically resolved--improvement can be achieved after stripping with a relatively large amount of nitrogen gas
Nitrogen stripping removes small molecules, and it also provides stirring; therefore, the cause of turbidity is related to small molecules such as water or other insoluble substances, as well as wax crystals. Based on your open-and-closed test, water is the most likely factor at play
I analyze that it is caused by trace polar substances—emulsification—and trace water. . . But it cannot be verified
I’ve encountered this problem with diesel; later on, I managed to clear it up by simply adding something, and then I used compressed air to make it clear again. I’m not sure if this will work for the base oil in your case as well