Supercritical CO₂ extraction technology is currently one of the world's most advanced methods for natural plant extraction. It enables efficient extraction of walnut oil and walnut protein at low temperatures (35–40°C) without solvent residue, perfectly retaining active ingredients (such as vitamin E and heat-sensitive substances) and achieving "full utilization" and "zero emissions."
The Value of Walnut Oil and Walnut Protein
The Value of Walnut Oil
Walnut oil, known as "liquid gold," contains polyunsaturated fatty acids (such as linoleic acid and omega-3 fatty acids), vitamins B and E, and other nutrients. It possesses anti-cancer, blood lipid-lowering, brain-boosting, and anti-aging properties, and serves as an excellent carrier for fat-soluble vitamins.
The Value of Walnut Protein
Walnut protein has a protein content higher than that of eggs and milk, and is rich in minerals such as calcium, iron, phosphorus, and zinc. It promotes children's intellectual development and physical growth, and is widely used in the food and health supplement industries.
Walnut Oil Supercritical CO₂ Extraction Process
Raw Material Pretreatment:
Select walnut kernels, crush them into 30–60 mesh particles, and control moisture content at 6–8%.
System Preparation:
Fill with food-grade CO₂ (purity ≥ 99.9%) and conduct a 50 MPa pressure leak test.
Supercritical Extraction:
Form supercritical CO₂ fluid at 35 MPa / 45°C, with dynamic cycling for 4–6 hours.
Multi-Stage Separation:
Gradually separate oil via three-stage pressure reduction (8 MPa → 5 MPa → atmospheric pressure).
CO₂ Recovery:
Purify via molecular sieve after cooling and liquefaction, achieving a recycling rate of ≥95%.
Oil Refining:
Filter impurities below 40°C, then winterize and dewax at 0–5°C for 24 hours.
Protein Co-Production:
Dry defatted meal at low temperature, then ultra-micro grind to extract walnut protein with a purity of ≥80%.
Quality Control:
Monitor key parameters (pressure ±0.5 MPa, temperature ±1°C) to ensure batch consistency.
Products DescriptionThe main parameter of supercritical CO2 extraction equipment
|
Item |
Spec |
Item |
Spec |
|
Temperature |
85℃(according water boiling point at site) |
Capacity |
50kg to 500kg per day |
|
Material |
SS304 or SS316 |
Pressure |
350bar/400bar |
|
Extractor |
Two extractors. |
Service |
Turnkey |
|
Vessels volume |
from 50L to 300L |
Brand |
Landerlee |
|
Manufacture time |
2 to 5months |
Pressure vessels standard |
China standard/ASME/PED |
|
Guarantee |
One year |
Separator |
three |
Why Choose Supercritical CO₂ Extraction Equipment?
1.Ultra-High Extraction Rate, Superior Oil Quality
①Extraction rates reach 93% or higher, far surpassing traditional pressing (50%–60%) and solvent leaching (~80%).
②Low-temperature physical extraction preserves heat-sensitive components such as vitamin E, squalene, and polyphenols.
③No solvent residue, complying with international food safety standards such as EU ECOCERT and U.S. FDA.
2.Eco-Friendly, Safe, and Pollution-Free
①Uses food-grade CO₂ as the extraction medium-no chemical solvents, wastewater, or harmful emissions.
②CO₂ recycling rate exceeds 95%, reducing operational costs and aligning with carbon-neutral policies.
3.Versatile and Cost-Effective
①Extracts high-value oils such as flaxseed oil, sea buckthorn oil, CBD oil, and essential oils.
②Simultaneously extracts walnut protein, enabling "oil + protein" co-production for maximum raw material utilization.
Flow chart of supercritical CO2 technology device
Applications of Walnut Oil and Walnut Protein
Walnut Oil Applications
1.High-End Cooking Oil: Ideal for cold dishes and low-temperature cooking, retaining unsaturated fatty acids and vitamin E.
2.Infant Nutrition: Added to baby rice cereal and fruit puree as a DHA supplement for brain and vision development.
3.Health Supplements: Encapsulated in softgels to enhance memory and regulate blood lipids, beneficial for seniors and professionals.
4.Pharmaceutical Excipients: Used in burn ointments-linoleic acid promotes skin regeneration and wound healing.
5.Cosmetic Ingredients: Incorporated into anti-aging creams-vitamin E and squalene neutralize free radicals.
6.Food Additives: Enriches baked goods (bread, cookies) with enhanced nutritional value.
Walnut Protein Applications
1.Protein Supplements: Made into powder for fitness enthusiasts and post-surgery recovery (digestibility >90%).
2.Plant-Based Beverages: Produces lactose-free walnut protein milk, suitable for lactose-intolerant consumers.
3.Special Medical Foods: Used in hypoallergenic infant formula (amino acid profile similar to breast milk).
4.Functional Foods: Added to anti-fatigue drinks (rich in arginine).
5.Feed Additives: Enhances pet food quality, improving fur health and immunity.
6.Food Improvers: Used in meat processing to improve water retention, tenderness, and texture.
Factory show
Packing photo
FAQ
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