In the global market of sesame oil exports, high - end refined sesame oil has always been favored for its superior quality and flavor. Leaching and refining technology plays a strategic role in this process. According to industry research, high - end sesame oil produced through advanced leaching and refining processes can achieve a market premium of up to 30% compared to ordinary products. This technology not only improves the purity and quality of the oil but also meets the strict quality and environmental requirements of international markets.
The leacher is the core equipment in the leaching process. It uses a solvent to extract oil from sesame seeds. The efficiency of the leacher directly affects the oil extraction rate. Generally, a well - designed leacher can achieve an oil extraction rate of over 95%. The operation logic is based on the principle of solubility, where the solvent penetrates the sesame seeds and dissolves the oil.
After the leaching process, the mixture of solvent and oil needs to be separated. The evaporator uses heat to evaporate the solvent, leaving behind the crude oil. The evaporation efficiency of the evaporator is crucial for energy consumption and production efficiency. Modern evaporators can reduce energy consumption by about 20% compared to traditional models.
The desolventizer further removes the remaining solvent in the crude oil to ensure the safety and quality of the oil. It operates under specific temperature and pressure conditions to achieve complete desolvation. The desolvation rate can reach over 99%, ensuring that the residual solvent content in the oil meets international standards.
The 'Six - Degreasing' refining process is a key step in improving the quality of sesame oil. Each step has strict control points that directly affect the quality of the oil. For example, in the degumming step, the addition of phosphoric acid and the control of temperature and time can effectively remove impurities and phospholipids in the oil, improving the clarity and stability of the oil.
| Refining Step | Control Points | Impact on Oil Quality |
|---|---|---|
| Degumming | Phosphoric acid addition, temperature, time | Removes impurities and phospholipids, improves clarity |
| Neutralization | Alkali concentration, temperature, mixing speed | Reduces acid value, improves flavor |
Solvent recovery technology is an important part of the leaching and refining process. It not only reduces environmental pollution but also saves production costs. Advanced solvent recovery systems can recover over 98% of the solvent, significantly reducing the cost of solvent consumption. At the same time, it ensures that the emission of waste gas and waste liquid meets environmental protection requirements.
Many sesame oil export manufacturers have achieved significant results through process optimization. For example, a certain company improved the quality of its sesame oil through the use of advanced leaching and refining equipment and processes. The acid value of the oil decreased from 1.5 to 0.5, and the peroxide value also decreased significantly. As a result, the company's products have gained a higher market share and price premium in the international market.
When selecting leaching and refining equipment, manufacturers should consider factors such as production capacity, energy consumption, and environmental protection requirements. In the future, with the development of technology, equipment will be more intelligent, energy - efficient, and environmentally friendly. For example, the application of artificial intelligence in equipment control can further improve production efficiency and product quality.
Q: What is the difference between leaching and refining and supercritical extraction?
A: Leaching and refining is a more traditional and cost - effective method, suitable for large - scale production. Supercritical extraction is a high - end technology with high purity but high cost, suitable for high - end product production.
Q: How to ensure the environmental compliance of the leaching and refining process?
A: By using advanced solvent recovery technology and waste treatment equipment, and strictly following environmental protection regulations.
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