Food Grade Silica Adsorbent for Edible Oil Refining

High-Purity Silica Dioxide for Superior Oil Processing

Food-grade amorphous silica acts as a high-performance adsorbent and phosphorus scavenger in edible oil production, selectively trapping phospholipids, saponins, and trace metal contaminants that compromise oil stability. Its engineered particle size distribution delivers exceptional filtration efficiency, while synergistic use with activated clay and diatomaceous earth enhances decolorization, minimizes crude oil loss, 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 authentic 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, and EU regulations.

1.2 Applications

• Refining and dephosphorization of vegetable oils including rapeseed, tea seed, and peanut oil

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

• Degumming and dephosphorization of animal fats such as beef tallow, mutton fat, lard, and chicken fat

• Polyphenol and protein removal in beer brewing to improve clarity and stability without compromising flavor

1.3 Key Performance Advantages

• Optimized specific surface area and pore structure deliver targeted adsorption of problematic impurities

• Enhanced affinity for polar contaminants improves adsorption efficiency and filtration performance

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

• Narrow particle size distribution ensures excellent filtration rates and permeability

Technical Specifications

Based on ≥99.0% ultra-high purity, our three-dimensional mesoporous structure precisely matches the molecular dimensions of phospholipids and free fatty acids in vegetable oils. It provides consistent adsorption capacity without chemical reaction with oil components, features heavy metal levels well below international limits, and maintains stable performance at typical oil refining temperatures of 180-220°C.

Application Benefits & Results

Our Zhongqi vegetable oil silica adsorbent achieves deep impurity removal and quality upgrading through precise pore engineering and superior adsorption properties:

1. High-Efficiency Degumming: For high-phospholipid oils like soybean and rapeseed, controlled dosages (0.3%-0.6% for soybean, 0.2%-0.5% for rapeseed) enable efficient capture of lecithin and cephalin colloids. Processed oil phospholipid levels drop from 1.2% to <0.1%, eliminating sedimentation issues and minimizing oil loss during filtration to improve production yields.

2. Targeted Deacidification: Selectively adsorbs free fatty acids in palm and peanut oils, reducing 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.

3. Dual Decontamination & Deodorization: Removes iron and copper heavy metal ions to stop oxidation at its source, while simultaneously neutralizing aldehyde and ketone odors from oxidation. For rapeseed oil processing, this eliminates "raw oil odor" while preserving natural aromatic compounds, enhancing sensory quality.

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

Recommended Usage

Maintain process temperature at 60-90°C, add 0.2%-0.5% adsorbent to the crude oil, and mix for 60-90 minutes to allow complete adsorption. The adsorbent and trapped impurities are then removed via standard plate-and-frame filtration, with residual filter cake in the final oil ≤5 ppm, meeting all food safety requirements.

Manufacturing Advantages

Zhongqi Guangdong Silicon Materials Co., Ltd. is a national high-tech enterprise and provincial-level "Specialized, Refined, Unique, Innovative" company 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.

Packaging & Logistics

• Standard packaging: 20/25kg 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 all food additive regulations; custom labeling available upon request

Frequently Asked Questions

Q: Why do different oils require different dosages?  

A: Dosages vary based on inherent 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 standard plate-and-frame filtration, with final oil residue ≤5 ppm, fully compliant with food safety standards.

Q: Does this product affect oil nutrition?  

A: No. It only adsorbs impurities like phospholipids, free fatty acids, and metal ions. Adsorption of beneficial unsaturated fatty acids (linoleic acid, oleic acid) and vitamin E is <2%, preserving full nutritional value.

Q: Can it replace imported silica products?  

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.