Ever wonder what makes high-quality soybean oil so clear, stable, and safe? The answer lies in the refining process – a sophisticated journey that transforms crude oil into premium Grade 1 cooking oil.
At Huatai Group's modern refining workshop, the entire process is automated and controlled by intelligent systems. Let's explore the key stages that make this transformation possible.
The Refining Process – Step by Step
- Crude soybean oil contains impurities such as phospholipids, free fatty acids (FFA), pigments, and odorous substances that make it unsuitable for direct consumption. Through Huatai's advanced refining technology, these impurities are systematically removed.
- Phosphoric Acid Treatment & Alkali Refining – Phosphoric acid is added to remove phospholipids and gums. This is followed by alkali refining using sodium hydroxide solution to neutralize free fatty acids, preventing oxidation and rancidity.
- Washing & Drying – The oil is washed with water to remove residual soap and impurities, then vacuum-dried to eliminate moisture that could promote oxidation.
- Decolorization (Bleaching) – Activated clay (such as activated white clay or attapulgite) is used to adsorb pigments like chlorophyll and carotenoids at temperatures of 120-140°C, giving the oil its crystal-clear appearance.
- Deodorization – Under high vacuum (0.1-1 mmHg) and high temperature (230-260°C), live steam is injected to strip away volatile odorous substances such as aldehydes and ketones, eliminating the beany smell.
For specific oils, additional processes like dewaxing may be applied. In dewaxing, oil is cooled to 15-25°C to crystallize waxes, which are then removed by filtration or centrifugation.
The refined oil is then pumped through sealed pipelines directly into finished oil tanks, ensuring zero contamination, and flows to the automated filling workshop for packaging.
Intelligent Control – Quality You Can Trust
Huatai's refining lines feature fully automated PLC control systems that monitor and adjust every step of the process. This intelligent central control ensures consistent quality, stable operation, and energy efficiency. The entire production line – from degumming to deodorization – runs automatically, delivering standardized management and reducing human error.
Key Advantages of Huatai's Refining Technology:
- ≤0.1% free fatty acids – significantly improved shelf life and stability
- Crystal clear color – enhanced consumer appeal
- Neutral taste – versatile for cooking applications
- Energy-saving design – optimized heat exchange and waste heat recovery reduce consumption by 15%+
- Full automation – intelligent PLC control for consistent quality
- Traceability – every drop can be traced from source to bottle
Why Huatai Group
Huatai Intelligent Equipment Group is a leading manufacturer of complete edible oil processing lines, backed by 38+ years of expertise and projects in 70+ countries. The company holds 100+ national patents and is recognized as a National "Little Giant" Enterprise and National Green Factory.
Huatai provides turnkey solutions for soybean oil refineries ranging from 10 to 5,000 TPD, covering the full spectrum of services: design, manufacturing, installation, commissioning, and training.
