1.Harvesting:Collect ripe walnut fruits.

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Walnut oil is extracted from the kernels of walnuts through pressing or solvent extraction methods. The production process involves several key steps:

2. Processing: Remove outer shell and inner kernel, then peel off the skin.

3. Extraction:

   • Pressing method: Grind the walnut kernels into powder and press to extract oil.
   • Solvent extraction method: Use organic solvents like hexane to dissolve fatty acids in the kernel, which are then separated and purified.

4. Filtration and concentration: Filter out impurities, and concentrate the oil to remove excess solvent.

   

5. Final purification: Distillation can be used to further purify the oil for better quality and taste.

6. Packaging: Store the final product in appropriate containers according to its characteristics.

The equipment used includes:

• Grinding machine (for milling nuts)
• Presses (for mechanical pressing)
• Evaporators (for concentrating liquid extracts)
• Vacuum distillers (for distilling oil)

Quality control measures include regular testing of the oil's nutritional content, acidity levels, and color, as well as sensory evaluation for flavor. This ensures that the walnut oil produced meets the required standards for health benefits and culinary use.