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In the globalized inorganic chemical matrix, Calcium Nitrate (chemical formula: $\text{Ca(NO}_3)_2$, often crystallized as the tetrahydrate $\text{Ca(NO}_3)_2 \cdot 4\text{H}_2\text{O}$) serves as a critical component in infrastructure, high-efficiency agriculture, and energy conservation. The modern synthesis of high-purity calcium nitrate relies on sophisticated neutralization processes involving industrial-grade nitric acid ($\text{HNO}_3$) and high-purity calcium carbonate ($\text{CaCO}_3$) or limestone.
Primary Chemical Equation of Synthesis:
VOJIN
CaCO₃ (s) + 2HNO₃ (aq) → Ca(NO₃)₂ (aq) + CO₂ (g) + H₂O (l)
This reaction forms the core of high-yield chemical processing, requiring highly automated filtration, crystallization, and granular packaging pipelines to avoid moisture contamination due to the compound's highly hygroscopic nature.
As an industry authority, the integration of Shriram Energy Calcium Nitrate workflows represents a synthesis of technical expertise. Industrial consumers must navigate key parameters like mechanical density, anti-caking additives, and crystallization properties. Modern applications demand specialized formulations, particularly double salt crystals containing ammonium nitrate stabilizers, formulated as $5\text{Ca(NO}_3)_2 \cdot \text{NH}_4\text{NO}_3 \cdot 10\text{H}_2\text{O}$, which significantly reduces hygroscopic tendencies during long-distance transit.
| Parameters | Industrial Grade (Anhydrous) | Agricultural Grade (Granular) | Thermal Storage Grade |
|---|---|---|---|
| Assay [$\text{Ca(NO}_3)_2$] | ≥ 99.0% | ≥ 76.0% (Calcium Content ≥ 19%) | ≥ 99.5% |
| Nitrogen (N) | ≥ 17.0% | ≥ 15.5% (Nitrate-N ≥ 14.4%) | ≥ 17.1% |
| Water Insolubles | ≤ 0.05% | ≤ 0.1% | ≤ 0.01% |
| pH Value (10% Solution) | 5.0 - 7.0 | 5.5 - 6.5 | 5.0 - 6.5 |
| Heavy Metals (as Pb) | ≤ 0.001% | ≤ 0.002% | ≤ 0.0005% |
| Granule Size (2 - 4 mm) | Powder / Granular | ≥ 90.0% | Flakes / Custom Granulation |
Industrial formulations require precise customization depending on regional environmental parameters, national codes, and distinct geographical constraints.
In cold-weather regions, calcium nitrate acts as an anti-freeze agent and setting accelerator. By speeding up the hydration of tricalcium silicate ($\text{C}_3\text{S}$), it reduces curing times, allowing concrete pouring down to -10°C without compromising structural integrity.
Municipalities utilize calcium nitrate dosing to prevent hydrogen sulfide ($\text{H}_2\text{S}$) gas formation in sewer systems. By establishing an anoxic environment, it promotes nitrates over sulfates as the primary electron acceptor, eliminating toxic and corrosive odor profiles.
In high-tech fertigation lines, calcium nitrate provides highly soluble calcium alongside essential nitrate nitrogen. It remains one of the few water-soluble calcium sources that will not precipitate out when paired with ammonium, preventing physiological disorders like blossom-end rot.
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Driven since 2000, we have been committed to the entrepreneurial spirit and passion for innovation. Our team takes pride in delivering dependable products and services with a quality distinction in thermal energy storage & water-soluble fertilizer industries globally.
Leveraging proximity to northern China's dense mineral fields, we maintain vertical control over critical feedstocks, allowing us to keep cost profiles stable while achieving purity rates of up to 99.5% for thermal energy installations and glass production lines.
View more infoThe industrial production of calcium nitrate is undergoing a significant transition focused on energy efficiency and carbon footprint reduction. At Shanxi Vojin New Materials, we are implementing a multi-stage technological modernization roadmap.
By integrating modern catalytic abatement systems ($\text{N}_2\text{O}$ catalysts), our chemical processing units reduce nitrous oxide emissions during production. This step ensures that our calcium nitrate carries a lower scope-1 carbon footprint compared to standard regional manufacturers.
Developing advanced fluid-bed spray granulation loops. By recycling exhaust thermal energy back into the dehydration towers, we decrease raw coal consumption by up to 22%, yielding high-density granules that resist fracturing during bulk pneumatic cargo loading.
R&D is scaling up ultra-low chloride calcium nitrate formulations. Free chloride ions corrode CSP (Concentrated Solar Power) piping systems. Lowering chloride content below 10ppm drastically extends the lifespan of binary and ternary molten salt thermal storage setups.
Shanxi Vojin's strategically positioned production hubs capitalize on China's integrated supply chain architecture. With raw chemical plants connected directly to rail infrastructure, shipping to key shipping terminals (like Tianjin Port and Qingdao Port) is streamlined.
Whether fulfilling LCL or charter-bulk shipments, our supply chain ensures year-round delivery consistency, minimizing shipping disruptions even during peak shipping seasons.
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For many years, we have successfully responded to the requirements of reputed customers in the market.
Authoritative insights into storage, specification matching, and process safety.
Agricultural-grade calcium nitrate contains an ammonium stabilization agent (typically around 1.5% ammoniacal nitrogen) to inhibit caking and minimize moisture absorption during storage. Industrial-grade formulations demand higher purity levels (typically 99% anhydrous), with minimal ammonium ion impurities, to prevent interference with glass manufacturing or concrete hydration chemistry.
It acts chemically by accelerating the precipitation of calcium hydroxide ($\text{Ca(OH)}_2$) during the initial phase of cement hydration. This acceleration reduces initial and final setting times, enabling faster formwork release, particularly in colder climates.
Due to its strong hygroscopic behavior, calcium nitrate must be stored in a cool, dry, and well-ventilated warehouse. Bags should be kept sealed and stored on pallets off the floor. Keep it away from reducing agents, organic materials, and strong acids to avoid potential exothermic reactions.
Unlike chlorine or biocides which kill off active sludge bacteria, calcium nitrate works metabolically. It feeds facultative anaerobic bacteria, which use nitrate ions for respiration rather than sulfate ions. This biochemically prevents the reduction of sulfate to hazardous hydrogen sulfide gas ($\text{H}_2\text{S}$).
Chloride levels exceeding 50ppm can induce pitting corrosion in stainless steel piping networks at elevated solar plant operating temperatures (often above 500°C). Using high-purity thermal-grade calcium nitrate preserves structural integrity across the system.
Yes. Our processing lines follow rigorous ISO 9001:2015 specifications. We supply full REACH registration documentation and compliant GHS-formatted safety data sheets for seamless European import clearance.
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