Sunflower Oil Production Process: Commercial Extraction & Refining Steps

QIE

2025-07-07

Tutorial Guide

As a highly nutritious edible oil, sunflower oil enjoys massive global demand. However, transforming raw sunflower seeds into crystal-clear, premium cooking oil requires integrated process engineering. As a global leading EPC contractor with 43 years of expertise, QIE GROUP breaks down the complete, modern industrial sunflower oil production line.

💡 Quick Summary for Investors:

Core Process: Cleaning → Dehulling → Flaking → Pressing/Extraction → Refining → Dewaxing (Crucial for Grade 1 Oil).
Capacity Options: 10–50 TPD (Mechanical Pressing) | 50–2000+ TPD (Solvent Extraction with residual oil ≤ 0.5%).
Control System: Fully automated PLC/SCADA smart control room.
👉 Need an immediate factory layout design & ROI analysis? Click Here to Contact QIE Engineers

Sunflower Processing Plant Produces Edible Oil

SECTION 1: Sunflower Seed Pretreatment

The foundation of a high oil yield lies in proper conditioning. It breaks the seed cell walls and protects downstream machinery from wear.

[Cleaning] ──> [Dehulling] ──> [Crushing] ──> [Flaking] ──> [Cooking]

1. Cleaning & De-stoning: Removes stones, metals, and leaves using vibrating sieves and magnetic separators to protect downstream rollers.
2. De-hulling & Separation: Cracks hulls and separates shells from kernels. Keeps residual hull content < 10% to prevent oil discoloration and wax contamination.
3. Crushing & Conditioning: Breaks kernels into 2–3 mm particles, adjusting moisture to 8%–10% and temperature to 60°C–70°C to enhance material plasticity.
4. Flaking: Compresses conditioned kernels into 0.3–0.35 mm thin flakes to disrupt cell structures and maximize oil release.
5. Cooking (Tempering): Heats flakes to 100°C–120°C to reduce moisture to 5%–6%, breaking down microscopic oil droplets and optimizing oil fluidity.

Preliminary Preparation Process of Sunflowers

SECTION 2: Oil Extraction (Pressing vs. Solvent Extraction)

Depending on your daily plant capacity and investment scale, commercial oil extraction is split into two primary methodologies.

🔹 Option A: Mechanical Pressing (10 - 50 TPD)

Best for small-to-medium scales or regional agribusinesses. Uses continuous sunflower oil screw presses to mechanically squeeze out crude oil, a pressed cake with an oil content of approximately 18% remains.

🔹 Option B: Solvent Extraction Turnkey Line (50 - 2,000+ TPD)

Mandatory for large-scale commercial plants to maximize profitability:

Pre-Pressing: First, the oil is extracted mechanically to form a high-porosity press cake.
Countercurrent Solvent Extraction: Uses n-Hexane in an advanced Horizontal Rotary Extractor to dissolve remaining oil.
Negative Pressure Evaporation: Recycles solvent vapor heat using steam jet pumps, reducing factory steam consumption by 10%–20%.
Desolventizing (DTDC): Strips solvent completely, yielding high-protein sunflower meal with residual oil ≤ 0.5% for the animal feed industry.

Pressing and Extraction of Sunflower Seed Oil

SECTION 3: Refining & Dewaxing (Achieving Grade 1 Quality)

Crude sunflower oil contains impurities that affect shelf-life and taste. It must pass through 5 automated refining sections to meet international cooking oil standards:

Refining Stage	Target Impurities Removed	Technology / Medium Used
1. Degumming	Phospholipids & Gums	Hydration (Hot Water) / Phosphoric Acid
2. Deacidification	Free Fatty Acids (FFA)	Alkaline Neutralization (NaOH) or Physical Steam Stripping
3. Decolorization	Chlorophyll & Carotenoids	Vacuum Adsorption via Activated Bleaching Earth
4. Deodorization	Volatile Odors & Aldehydes	High-Vacuum Steam Distillation (240°C–260°C)
5. Dewaxing	Plant Waxes (0.5%–1.2%)	Low-Temperature Crystallization & Plate Filtration

⚠️ Why the Dewaxing Section is Mandatory

Sunflower oil naturally carries a high percentage of plant waxes. If this step is skipped, the oil will turn cloudy and crystallized when stored on winter supermarket shelves, failing premium market quality standards.

In QIE GROUP's advanced refining lines, we deploy a dedicated crystallization process. The oil is slowly cooled down to 10°C–15°C to form solid wax crystals, which are then completely removed via automatic plate-and-frame filter presses. This ensures the finished oil remains crystal clear in any climate.

Equipment for refined sunflower seed oil

SECTION 4: Plant Automation & Configuration Options

Feature	Small-Scale Line (10 - 50 TPD)	Large Industrial Line (50 - 2000+ TPD)
Core Process	Mechanical Pressing + Batch Refining	Pre-pressing + Solvent Extraction + Continuous Refining
Control System	Semi-Automated Panel	Full PLC+ SCADA Centralized Automation
Best For	Lower initial investment, fast payback	Maximum oil yield, minimum labor, global exports

Partner with QIE GROUP for Global Edible Oil Success

Building a sunflower oil processing plant requires integrated process engineering, multi-stage heat recovery, and reliable machinery built to last. We have delivered world-class EPC turnkey projects for edible oil facilities globally, including a large-scale sunflower oil processing plant in Central Asia with a daily processing capacity of 1,000 tons, as well as automated solvent extraction production lines in the region.

💡 Get Your Custom Project Solution Today

Are you planning to build a new sunflower oil production plant or upgrade an existing facility? Contact QIE GROUP's senior engineering team today. We provide tailored engineering designs, comprehensive equipment quotes, factory floor layout blueprints, and detailed ROI (Return on Investment) financial analysis customized specifically to your capacity requirements.

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