Food Grade Silica Adsorbent for Edible Oil Refining

High-Purity Silica Dioxide for Efficient Degumming, Deacidification & Purification

Food-grade amorphous silica acts as a high-performance adsorbent and phosphorus scavenger in edible oil processing, selectively trapping phospholipids, saponins, and trace metal contaminants to significantly improve oil oxidative stability. Its engineered particle size distribution delivers superior filtration rates, while synergistic use with activated clay and diatomaceous earth enhances decolorization efficiency, minimizes oil retention in filter cake, elevates final product quality, and extends shelf life. This dust-free formulation enables water-free degumming processes, reducing waste generation and wastewater discharge while preserving the natural flavor and nutritional profile of oils.

Our specialized vegetable oil silica adsorbent is purpose-built for processing soybean, rapeseed, peanut, palm, and other plant-based oils. It directly solves three critical industry challenges: excessive phospholipids, elevated free fatty acids, and residual metal ions—all of which cause smoking during cooking, premature rancidity, and shortened product shelf life. This product complies with global food safety standards including GB 25576-2020, FDA 21 CFR, and EU food additive regulations.

1. Applications

• Refining, degumming and dephosphorization of vegetable oils (rapeseed, tea seed, peanut, soybean, palm)

• Impurity removal, color clarification and taste enhancement in juice and beverage manufacturing

• Degumming and dephosphorization of animal fats (beef tallow, mutton fat, lard, chicken fat)

• Beer brewing: selective removal of polyphenols and proteins to improve clarity and colloidal stability without compromising flavor

2. Key Performance Advantages

• Tailored specific surface area and mesoporous structure for exceptional adsorption of targeted impurities

• Enhanced affinity for polar contaminants, improving both adsorption capacity and filtration kinetics

• Reduces free fatty acid content, improves oil color, and prevents product thickening

• Narrow particle size distribution ensures excellent filterability and permeability

• 99.0%+ ultra-high purity with 3D interconnected mesoporous structure precisely matched to phospholipid and free fatty acid molecular sizes

• Stable adsorption capacity with no chemical reaction with oil components

• Heavy metal residues well below international limits

• Full performance retention at 180-220°C typical oil refining temperatures

3. Technical Specifications

4. Application Benefits & Results

Our ZLSIL-58GZ1-Z3 silica adsorbent delivers deep impurity removal and quality upgrading through precise pore engineering and high adsorption capacity:

Efficient Degumming: For high-phospholipid oils like soybean and rapeseed, controlled addition rates (0.3-0.6% for soybean, 0.2-0.5% for rapeseed) enable efficient capture of lecithin, cephalin, and other colloidal substances. Processed oil phospholipid content is reduced from 1.2% to <0.1%, eliminating sedimentation issues and minimizing oil loss during filtration to improve production yields.

Targeted Deacidification: Selectively adsorbs free fatty acids in palm and peanut oils, lowering acid values from 2.0 mg KOH/g to <0.8 mg KOH/g—meeting China's Grade I edible oil standards. This significantly reduces oxidative spoilage risk, extending shelf life to over 12 months and reducing inventory losses for manufacturers.

Dual Decontamination & Deodorization: Simultaneously removes heavy metal ions (iron, copper) that catalyze oxidation and neutralizes odorous aldehydes and ketones. In rapeseed oil processing, this completely eliminates "raw oil odor" while preserving natural aromatic compounds, enhancing sensory quality.

Proven Industry Results: A leading Chinese vegetable oil manufacturer replaced traditional degumming agents with ZLSIL-58GZ1-Z3, achieving 15% higher refining efficiency. Their refined soybean oil obtained EU export certification, driving a 20% year-on-year increase in export volume.

5. Recommended Usage Procedure

Maintain oil temperature at 60-90°C, add 0.2-0.5% silica adsorbent, and mix thoroughly for 60-90 minutes to allow complete adsorption. After adsorption, remove the adsorbent and impurities through standard plate-and-frame filtration, with residual adsorbent in final oil ≤5 ppm, meeting all food safety requirements.

6. Manufacturer Advantages

Zhongqi Guangdong Silicon Materials Co., Ltd. is a national high-tech enterprise and provincial "Specialized, Refined, Unique, Innovative" enterprise with over 20 years of industry experience. We hold 17 patents, operate a GMP-certified production base, and maintain a comprehensive 26-step quality control system from raw materials to finished products. Our facilities are equipped with advanced analytical instruments including atomic fluorescence spectrometers and laser particle analyzers, and we hold ISO 22000 food safety management system certification.

7. Packaging & Logistics

• Standard packaging: 20/25 kg composite film valve bags with outer PE waterproof lining

• Storage: Cool, dry environment; 24-month shelf life

• Classification: Non-hazardous chemical, suitable for global shipping

• Labeling: Complies with international food additive labeling requirements; custom labeling available

8. Frequently Asked Questions

Q: Why do dosage rates vary by oil type?  

A: Dosage is determined by initial phospholipid content and acid value. Soybean oil typically contains 1.0-1.5% phospholipids, requiring 0.3-0.6% adsorbent for complete degumming, while palm oil with 0.3-0.5% phospholipids only needs 0.3-0.5%.

Q: How is the adsorbent separated from the oil?  

A: No additional processing steps are required. The adsorbent is removed during the standard plate-and-frame filtration step in oil refining, with residual levels ≤5 ppm.

Q: Does this product affect oil nutritional value?  

A: No. It only adsorbs impurities (phospholipids, FFAs, metals), with <2% adsorption of beneficial unsaturated fatty acids (linoleic, oleic) and vitamin E, preserving full nutritional value.

Q: Can it replace imported silica adsorbents?  

A: Yes. Our product matches international brands in phospholipid removal and acid reduction performance, while offering 20-30% lower bulk purchase costs. It has been successfully adopted by numerous oil refineries with consistent processing results.