Product Introduction
Sulfuric acid is an inorganic compound with the chemical formula H₂SO₄. It is the most important oxygen-containing acid of sulfur. Pure sulfuric acid is a colorless, oily liquid that crystallizes at 10.36°C. It is typically produced using the tower method and the contact method, depending on the required concentration of the aqueous solution. Concentrated sulfuric acid with a mass fraction of 98.3% has a boiling point of 338°C and a relative density of 1.84.
Our company uses advanced multi-stage separation and purification technology to produce food additive-grade sulfuric acid. We obtained a food production license in July 2018, and the product has since been launched on the market in large quantities. It is primarily used in the production of glucose, sugar, yeast, edible oil, alcohol, gelatin, and other food industries closely related to public health.
This product fills a production gap in the Beijing-Tianjin-Hebei, Liaoning, and Inner Mongolia regions, ending the reliance of users in these areas on long-distance, high-cost procurement.
Application
As an important food additive, sulfuric acid plays an important role in improving food quality and shelf life.
1. Preservatives
Sulfuric acid has strong bactericidal properties and can effectively inhibit the growth of microorganisms such as bacteria and mold, thereby extending the shelf life of food. In certain products, such as dairy items, fruit juices, and canned goods, it is used as a preservative to help maintain freshness and quality.
2. Acidifiers
Sulfuric acid can lower the pH value of food, help improve the taste and flavor of food, and also inhibit the growth of certain harmful microorganisms. When making foods such as hot and sour noodles and kimchi, sulfuric acid is often used as an acidifier to increase the acidity of the food.
3. Antioxidants
Sulfuric acid can react with oxidizing substances in food, helping to delay oxidation and spoilage. In products such as oils, fats, and food colorings, it may be used to enhance stability and extend shelf life.
When using food-grade sulfuric acid, it is essential to strictly follow national food safety standards and regulations to ensure food safety and protect consumer health.
Product Parameters
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Index requirements for food additive sulfuric acid |
||
|
Index |
92 acid |
98 acid |
|
Content (H2SO4), ω/% |
≥92.5 |
≥98.0 |
|
(NO3), ω/% |
≤0.001 |
|
|
Reducing substances |
Through testing |
|
|
Chloride (as Cl), ω/% |
≤0.005 |
|
|
(Fe), ω/% |
≤0.020 |
|
|
(Se)/ (mg/kg) |
≤20 |
|
|
(Pb)/ (mg/kg) |
≤5 |
|
|
(As)/ (mg/kg) |
≤3 |
|
|
Color |
White or light brown |
|
|
State |
Clear, oily liquid |
|
Preparation method
The preparation method of food additive sulfuric acid mainly includes the following steps:
- Evaporation: Evaporate sulfur trioxide of fuming sulfuric acid through high temperature.
- Absorption: Absorb the evaporated sulfur trioxide gas through an absorption tower to obtain high-concentration sulfuric acid.
- Mixing and dilution: Add high-concentration sulfuric acid to high-purity water for mixing and dilution to obtain a food additive sulfuric acid product that meets the standards.
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