Efficient Sesame Oil Refining Process

The residual oil content in sesame oil cakes after pressing is quite high, which not only affects the quality of the meal but also represents a waste of resources for the oil plant. Therefore, to increase the oil yield, larger oil plants can use extraction equipment to recover the remaining oil from the sesame cakes.

The solvent extraction process involves fully contacting the solvent with the oil material in the extractor, dissolving the oil in the material to obtain mixed oil, and then recovering the solvent through evaporation, desolvation, and condensation to obtain extracted sesame oil.

Extracted sesame oil contains impurities and residual solvent, so the refining stage involves a series of treatments such as decolorization and deodorization to remove impurities, solvent residues, and harmful substances, ensuring the oil is safe for consumption.

Sesame Oil Refining Process Steps:

1. Degumming and Neutralization:

 This step uses the hydrophilic nature of colloidal impurities. By adding an appropriate amount of electrolyte solution to the crude oil, the impurities absorb water and coagulate, then are removed by sedimentation and separation.

2. Deacidification: 

This step separates free fatty acids from the crude oil to lower the acid value. By adding an appropriate amount of alkali solution, a reaction occurs producing fatty acid salts and water, which are then separated from the oil by centrifugation.

3. Decolorization: 

This step removes pigments from the oil through adsorption and chemical reactions, improving the oil's color and transparency.

4. Deodorization: 

This step removes odors from the oil through adsorption and distillation, enhancing the taste and quality of the edible oil.

5. Dewaxing: 

This essential step removes waxes from the oil, which originate from the raw materials and cannot be absorbed by the human body. At low temperatures, these waxes can cause the oil to become cloudy and solidify, affecting its appearance. Dewaxing involves crystallizing and separating the wax from the oil at low temperatures.

In the edible oil processing industry, refining equipment is crucial for ensuring the quality and safety of edible oil. These machines are highly automated, easy to operate, and have strong processing capabilities and excellent results. To ensure the equipment operates normally and effectively, regular maintenance and quality control of the processed oil are necessary to meet relevant standards.

The advantages of the extraction process include high efficiency, large output, low residual oil content in the meal, and high sesame oil yield. However, extracted sesame oil must be refined before consumption, and its flavor and nutrition are not as good as those produced by other methods. Therefore, the raw materials for extracted sesame oil are mostly sesame cakes from pressing or pre-pressing, which effectively increases the oil yield and creates more profit for the oil plant.