Cold Pressed Peanut Oil: Process, Machine & Price

Introduction

Cold pressed peanut oil process is a modern oil processing method, can maximize retain the original nutritional content and natural flavor of peanuts. During cold press production, keep temperatures below 60°C, avoiding the nutritional damage that traditional high-temperature pressing causes.

This method is especially well-suited to modern consumers seeking healthy, natural foods. For investors, this technology can offer higher product value and market competitiveness.

Below, I will introduce you to the cold pressed groundnut oil production process, equipment used, and pricing for different types of equipment.

10 Steps Cold-Pressed Peanut Oil Processing

The cold-pressed peanut oil production process involves multiple steps: raw material selection, pretreatment, low-temperature pressing, and filtration. Each step requires precise control to ensure final product quality.

Step 1: Raw Material Screening

Peanut kernel through screen to remove iron filings, stones, impurities, and moldy particles. High-quality raw materials form the foundation of cold-pressed peanut oil quality. Select fresh, plump, mold-free, and insect-free premium peanut kernels.

The screening process combines gravity separators with magnetic selection equipment, ensuring impurity removal rate exceeding 99.5%.

Step 2: Grading

The screening system sorts peanut kernels through grading screens into three size categories: large, medium, and small.

Each grade enters the next process separately, which prevents problems like incomplete red skin removal or uneven pressing pressure that size variations can cause.

Step 3: Drying and Cooling

The low-temperature dryer processes graded peanut kernels using hot air at 80°C-100°Cfor 20-25 minutes. The system then immediately cools the materials rapidly to room temperature.

This step reduces the moisture content of peanut kernels to 5%-8% while avoiding protein denaturation from high temperatures, preparing the kernels for the next red skin removal.

Step 4: Remove Red Skin

The cooled peanut kernels are immediately fed into a hulling machine to remove the red skins and separate the kernels from the skins. This process requires picking out any kernels that retain red skins or discoloration, ensuring only completely peeled kernels enter the pressing stage.

Peanut red skins contain tannins and other substances that affect oil taste and color. Therefore, the red skin removal process critically ensures the light taste of cold-pressed peanut oil.

Step 5: Crushing

The crusher crushing peeled peanut kernels into 4-6 pieces. Crushing increases surface area, promoting moisture and heat transfer in the next conditioning and oil extraction steps.

Careful control of powder fineness is necessary during crushing. Over crushing reduces oil yield and increases oil turbidity.

Step 6: Conditioning

Add 2%-4% water at 60°C-80°C to the crushed peanut pieces in a multi-layer conditioning cooker. Maintain for 40-60 minutes to absorb water, draw the oil to the surface of the kernels.

This is key step in the cold-press peanut oil process. Gentle heat treatment increases cell wall permeability, promoting oil to release more easily from cells while avoiding high-temperature damage to oil quality.

Step 7: First Cold Pressing

The conditioned peanut kernels enter a double screw oil press for initial cold pressing. The press keeps the cake temperature at below 60°C, with residual oil content in the cake at 11%-20%. After first pressing, the oil press breaks the cake at the outlet to prepare it for secondary pressing.

The double screw oil press uses counter-rotating screws for relative shearing feeding. This design provides high thrust and self-cleaning oil channels, more suitable for low-temperature pressing.

Step 8: Second Cold Pressing

Another set of double screw oil presses processes the cake from the first pressing in a second cold pressing. The outlet maintains cake temperature below 60°C, reducing residual oil content to less than 6%. Secondary pressing ensures high oil yield while maintaining low-temperature process characteristics.

The double screw design achieves high theoretical compression ratios. Oil material undergoes five compression and expansion cycles in the pressing chamber, combining thick and thin material layers for powerful extraction.

Step 9: Oil Filtration

The crude oil obtained from pressing through multi-stage filtration:

1. First filtration: Box filters perform initial filtration of crude oil from both first and second cold pressing.
2. Second filtration: Plate and frame filters provide fine filtration.
3. Third filtration: Bag filters conduct final filtration to produce clear, transparent finished peanut oil.

Step 10: Storage and Packaging

Store filtered peanut oil in dark, sealed conditions. Storage tanks with nitrogen protection prevent oxidation.

For packaging, dark glass bottles or food-grade opaque plastic bottles help retain oil quality and extend shelf life.

Peanut Oil Cold Press Machine Types and Price Analysis

Peanut oil cold press machine is mainly categorized into the following types based on processing capacity and automation levels. The prices are different:

Note: The above prices are for reference only. Real prices may vary based on configuration, material (e.g., 304 stainless steel), and automation level.

Cold Pressed Peanut Oil Machines Advantages

Cold-press peanut oil technology offers multiple advantages over traditional hot-press methods. These advantages directly translate into product market competitiveness and economic benefits:

• Nutrient Preservation: Low-temperature pressing fully retains natural bioactive substances in vegetable oil, including unsaturated fatty acids, vitamins, proteases, lecithin, and trace elements. Studies show cold-pressed peanut oil contains 20-30% more vitamin E than hot-pressed oil.
• Natural Flavor Retention: Cold-pressed peanut oil retains its natural color, aroma, and taste without the burnt smell from high-temperature processing, better meeting high-end consumer demand for natural foods.
• Reduce Production Cost: The low-temperature cold-pressing process removes softening, flaking, and roasting steps required in hot-pressing. This reduces equipment needs, removes environmental pollution, and lowers energy consumption. Production costs reduce 15-20% compared to traditional methods.
• High-value Cake Meal: The strip-shaped press cake (oil meal) from low-temperature pressing protein damage (less than 10% loss), facilitating optimal utilization of oilseed protein. These cakes serve as high-value food ingredients for animal feed, fertilizer, fuel, and protein extraction, generating additional revenue.
• High Oil Yield: Double screw oil presses with secondary pressing achieve oil yields above 95%, with dry cake residual oil rates as low as 4-8%, delivering significant economic benefits.
• Energy Efficiency and Environmental Protection: Compared to older equipment, new cold press machines reduce power consumption by 40%, with processing power consumption per ton dropping by 15%. The system requires no boiler steam equipment, reducing thermal pollution and emissions.

Conclusion

Overall, the cold pressed peanut oil process is an eco-friendly production method. It uses a low-temperature cold-pressing technology. The peanut oil production line operates continuously from raw material input to finished peanut oil output.

For clients planning to invest in the peanut oil industry, selecting suitable cold-press equipment and processes is important. Huatai Intelligent Equipment Group integrates design, manufacturing, and installation as a comprehensive peanut oil extraction equipment manufacturer. We welcome your visits to our factory at any time!