Which is better for edible oil proudction: cold pressing or hot pressing?

Regarding whether it is better to use cold pressing or hot pressing for edible oil, oil equipment manufacturers usually answer from multiple perspectives such as process characteristics, nutritional value, and application range.

1. Cold Pressing Process

•  Process Characteristics: 

The cold pressing process is carried out at an appropriate low temperature and is a physical oil extraction process. This process does not involve high-temperature heat treatment, thus retaining more of the natural flavor, color, and nutrients in the oil.

•  Nutritional Value:

 Since the cold pressing process avoids high-temperature damage, beneficial substances such as tocopherols and phytosterols in the oil are preserved intact, resulting in higher nutritional value. Additionally, cold-pressed oil only needs to be filtered to meet edible oil standards, making it greener and more environmentally friendly.

•  Application Range:

 The cold pressing process is suitable for processing oilseeds with high oil content to produce high-quality edible oil. However, due to the relatively low oil yield of cold pressing, secondary or multiple pressings are generally required to ensure thorough extraction.

2. Hot Pressing Process

•  Process Characteristics: 

The hot pressing process involves roasting the plant seeds at high temperatures before pressing, usually at higher temperatures. This process can break down the cell structure in the oilseeds, making it easier to extract the oil, thereby increasing the oil yield.

•  Nutritional Value:

 Although hot-pressed oil has relatively lower nutritional value compared to cold-pressed oil, the high-temperature treatment gives the oil a unique aroma and rich taste. At the same time, the nutrients in hot-pressed oil still have certain nutritional value, and it is moderately priced with wide market acceptance.

•  Application Range:

The hot pressing process is suitable for edible oil processing plants that aim to balance production volume, economic benefits, and product taste. It is especially suitable for edible oil brands that focus on traditional flavors, local specialties, or the mass market.

3. Comprehensive Comparison

1. Nutritional Value: 

From a nutritional perspective, cold-pressed oil retains more beneficial substances and has higher nutritional value. Although hot-pressed oil loses some nutrients, its unique aroma and taste have earned it a certain market.

2. Oil Yield and Cost: 

The oil yield of the hot pressing process is higher than that of the cold pressing process, giving hot-pressed oil a cost advantage in production. However, the high quality of cold-pressed oil also brings higher added value.

3. Application Range and Market Demand: 

Different edible oil brands and market positions have different choices for pressing processes. Brands that focus on high quality and health concepts tend to choose the cold pressing process, while brands that focus on traditional flavors, local specialties, or the mass market may prefer the hot pressing process.

In summary, there is no absolute answer to whether cold pressing or hot pressing is better for edible oil. Oil equipment manufacturers usually make comprehensive considerations based on the actual needs, product positioning, and market trends of their customers when recommending pressing processes.