Food-Grade Silica Adsorbent for Edible Oil Processing

Product Overview

Our food-grade silica is a high-performance adsorbent and phosphorus scavenger engineered specifically for edible oil refining. It selectively traps phospholipids, saponins, and trace metal contaminants that cause oil degradation, significantly enhancing oxidative stability and extending product shelf life. Its precisely calibrated particle size distribution optimizes filtration speed and reduces oil entrainment. When used in synergy with activated clay and diatomaceous earth, it delivers superior decolorization efficiency while minimizing crude oil loss, elevating overall product quality. The dust-free formulation enables water-free degumming processes, cutting down on waste residues and wastewater discharge while preserving the authentic flavor and nutritional profile of oils.

This specialized vegetable oil adsorbent addresses three critical industry challenges: excessive phospholipids, elevated free fatty acids, and residual metal ions—all of which lead to smoking during cooking, premature rancidity, and shortened shelf life. It is fully compliant with GB 25576-2020, FDA, USP, and EU EC food safety standards, making it suitable for global export markets.

1.2 Scope of Application

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

• Impurity removal, color clarification, and taste enhancement in juice and beverage manufacturing, meeting stringent food-grade requirements

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

• Beer brewing processes: effectively removes polyphenols and proteins to improve clarity and colloidal stability without compromising beer flavor

1.3 Performance Advantages

• Tailored specific surface area and three-dimensional mesoporous structure provide exceptional adsorption capacity for targeted impurities

• Enhanced affinity for polar contaminants improves adsorption efficiency, filtration performance, and production process stability

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

• Narrow, concentrated particle size distribution ensures excellent filtration rates and permeability

• Ultra-high purity (≥99.0% SiO₂) with heavy metal residues far below international limits

• Chemically inert at typical oil refining temperatures (180-220℃), with no performance degradation or unwanted reactions with oil components

Technical Specifications

Application Value & Practical Results

Zhongqi's vegetable oil-specific silica adsorbent achieves deep impurity removal and quality upgrading through precise pore design and superior adsorption performance. Its key application benefits include:

1. High-Efficiency Degumming: For high-phospholipid oils like soybean and rapeseed oil, our product's unique mesoporous structure efficiently captures colloidal substances such as lecithin and cephalin. At the recommended dosage (soybean oil 0.3%-0.6%, rapeseed oil 0.2%-0.5%), it reduces phospholipid content from 1.2% to below 0.1%, eliminating sedimentation issues in subsequent processing and minimizing oil loss during filtration to improve production yield.

2. Targeted Deacidification: It selectively adsorbs free fatty acids in palm and peanut oil, lowering acid values from 2.0 mg KOH/g to below 0.8 mg KOH/g—fully meeting China's Grade I edible oil standards. This significantly reduces oxidative spoilage risks, extending shelf life to over 12 months and helping enterprises reduce inventory losses while expanding sales cycles.

3. Dual Decontamination & Deodorization: The product works through two complementary mechanisms: it adsorbs heavy metal ions (iron, copper) that catalyze oxidation, and simultaneously neutralizes odorous aldehydes and ketones formed during oil degradation. In rapeseed oil processing, for example, it completely eliminates "raw oil odor" while preserving the oil's natural aromatic profile, enhancing sensory quality.

4. Proven Industry Success: A leading domestic vegetable oil manufacturer replaced traditional degumming agents with our ZLSIL-58GZ1 model. Post-implementation, soybean oil refining efficiency improved by 15%, and the refined products obtained EU export certification. The company saw a 20% year-on-year increase in export volumes, achieving breakthroughs in efficiency, quality, and market performance.

Recommended Usage Process

Maintain oil temperature at 60-90℃, add 0.2%-0.5% of the adsorbent, and mix thoroughly for 60-90 minutes to allow contaminants to adsorb onto the silica particles. After adsorption is complete, the mixture can be filtered using standard plate-and-frame filtration equipment to remove both impurities and the spent adsorbent.

Factory Advantages

Zhongqi Guangdong Silicon Materials Co., Ltd. is a national high-tech enterprise and provincial-level "Specialized, Refined, Unique, and Innovative" enterprise with over 20 years of industry experience. We hold 17 patented technologies and operate a GMP-certified production base equipped with advanced testing instruments including atomic fluorescence spectrometers and laser particle analyzers. Our comprehensive 26-step quality control system covers every stage from raw material inspection to finished product testing. The company has also obtained ISO 22000 food safety management system certification.

Packaging & Logistics

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

• Storage & Transportation: Store in a cool, dry place; shelf life of 24 months. Classified as non-hazardous chemicals, suitable for global shipping

• Labeling: Each package is marked with mandatory food additive information including usage limits and production license numbers. Custom labeling is available upon request

Frequently Asked Questions

Q: Why do different vegetable oils require different dosages?  

A: Dosage varies based on the initial phospholipid content and acid value of each oil. For example, soybean oil typically contains 1.0%-1.5% phospholipids, requiring a higher dosage (0.3%-0.6%) for complete degumming. Palm oil, with lower phospholipid content (0.3%-0.5%), can use a reduced dosage of 0.3%-0.5%.

Q: How is the spent adsorbent separated from the oil?  

A: No additional complex processes are needed. The adsorbent is removed along with impurities during the standard plate-and-frame filtration step in vegetable oil refining. Residual adsorbent in the finished oil is ≤5 ppm, fully complying with food safety standards.

Q: Does the product affect the nutritional value of vegetable oil?  

A: No. It only adsorbs impurities such as phospholipids, free fatty acids, and metal ions. The adsorption rate for beneficial unsaturated fatty acids (linoleic acid, oleic acid) and vitamin E is less than 2%, preserving the oil's original nutritional content.

Q: Can it replace imported similar products?  

A: Yes. Our product matches the adsorption performance (phospholipid removal and acid value reduction) of leading international brands, while offering 20%-30% lower bulk purchase costs. It has been successfully adopted by numerous oil refineries with stable processing results.