Edible oil dewaxing is an important link in the process of oil refining. Its main purpose is to remove waxy components from oil, make products clearer and more transparent, and improve quality and taste. However, the dewaxing process is not easy, and there are many technical difficulties and challenges.

First of all, the content of waxy components in edible oil is low, but it has a significant impact on the appearance and quality of oil products. How to effectively separate these trace waxes without affecting other components of oils and fats is the core difficulty of dewaxing process. Usually, the melting point of wax is high, while the melting point of other components in edible oil is low, so it is necessary to accurately control the temperature to ensure that wax can be precipitated and avoid changes in other components of oil.

Secondly, the dewaxing process requires efficient cooling and filtration technology. In the cooling stage, the oil needs to be quickly cooled to the temperature range where wax precipitates, which puts high demands on the refrigeration capacity and process design of the equipment. In the filtration stage, it is necessary to ensure that the precipitated wax particles can be completely removed and the filtration device can not be blocked, which requires high-performance filtration materials and precise process control.

Besides, the wax content and properties of different kinds of edible oils are different, so the dewaxing process needs to be adjusted according to the specific oil types. For example, the wax composition and melting point of vegetable oils such as soybean oil, sunflower oil and corn oil are quite different, which requires flexibility and adaptability of process parameters such as cooling rate, temperature range and filtration method.

Finally, both economy and environmental protection should be taken into account in the dewaxing process. On the one hand, it is necessary to minimize energy consumption and production costs; On the other hand, the by-products produced by dewaxing need to be properly treated to avoid environmental pollution.

In a word, the dewaxing process is complex and delicate, which needs to be optimized in technology, equipment and management. With the progress of science and technology, it is believed that more efficient and environmentally friendly new technologies will be applied to dewaxing in the future, thus further improving the quality and market competitiveness of edible oil.