No matter the crude soybean oil is get by oil press or oil solvent extraction way, it can be refined by the soybean oil refinery machine. The main purpose of oil refinery machine is to separate the impurities in the crude soybean oil based on the different characteristics and enhance the stability and purity of oil. Oil refining includes two technologies, physical refining and chemical refining.
Usually the physical refining is used for the capacity above 30 tons per day. It’s also used when the acid value of crude oil is low. The physical refining includes three main section, degumming, decolorization and deodorization. The deodorization tower has the function of moving acid and smell, so the acid is moved at the same time of the smell. This is the special part for the physical refinery.
The chemical refining machine also has three main sections, degumming and deacidification, decolorization and deodorization. The chemical refining means that it will use chemical in the whole refinery. In fact, only the deacidification section needs the alkali. The decolorization and deodorization are same to the physical way. The chemical way is suitable for small capacity and high acid valued oil.
Both the physical refining and chemical refining can be used in the soybean oil refinery machine. You can choose the appropriate line according to the quality of your crude soybean oil and the capacity.
The specification of refined soybean oil
| Item | Standard |
| Color (Lovibond Cell 133.4mm) ≤ | R2.0 Y20 |
| Smell and taste ≤ | No smell and good taste |
| Transparence ≤ | Clear and transparent |
| Moisture and volatile matter (%) ≤ | 0.05 |
| Insoluble impurities (%) ≤ | 0.05 |
| Acid value (mgKOH/g) ≤ | 0.2 |
| Peroxide value (mmol/kg) ≤ | 5 |
| Smoke point (℃) ≥ | 215 |
Both the physical and chemical refining can be used to get high quality soybean oil. It can to used to refine crude soybean oil by pressing way or solvent extraction way. You can choose the appropriate line according to the quality of your crude soybean oil and the capacity.
