I. Market Overview and Industry Position
Global Market Size
In 2024, the global industrial-grade VC market reached a significant scale, with the electronic-grade VC segment (requiring higher purity) experiencing even faster growth. The total global market size is approximately USD 1.389 billion.
China has emerged as the primary growth driver and largest consumer market for VC worldwide, accounting for over 70% of global production capacity and playing an increasingly critical role in the global VC supply chain.
Global VC Market Size & China Capacity Share
Sample chart description
Downstream Application Analysis
| Application Area | Required VC Purity | Main Function | Growth Drivers |
|---|---|---|---|
| Lithium Battery Electrolyte | ≥99.995% | SEI film formation, extended battery life | EV adoption, energy storage expansion |
| Resin Modification | ≥98% | Improved heat resistance, mechanical strength | Lightweighting in aerospace industry |
| Organic Synthesis | ≥98% | Intermediate for pharmaceuticals/agrochemicals | Growth in fine chemicals sector |
| Specialty Coatings | ≥99% | Anti-corrosion, electrical insulation | Industrial protection demand growth |
Lithium Battery Electrolyte: Core Application of Electronic-Grade VC
Power Battery Electrolytes
New energy vehicle (NEV) batteries require excellent high-temperature stability and extended cycle life.
Consumer Electronics Batteries
Batteries for phones/laptops prioritize safety and high energy density.
Energy Storage Batteries
Solar/wind energy storage systems focus on long cycle life and cost efficiency.
VC Downstream Application Demand Distribution
VC downstream application demand distribution (2024 Estimate)
II. Challenges of Traditional Separation Technologies
The traditional separation method for electronic-grade carbonates is distillation, but it faces four key challenges:
Azeotrope Formation
For example, Dimethyl Carbonate (DMC) forms an azeotrope with methanol. The mainstream solution (pressure-swing distillation) requires multiple columns, has high energy consumption, and produces impure, unstable products.
Close Boiling Points
VC and its impurity (diethylene glycol) have a boiling point difference of only ~2°C at normal pressure, significantly increasing separation energy consumption.
Thermal Sensitivity
VC decomposes/polymerizes at high temperatures (thermal sensitivity temp. ~60°C). High-temperature distillation reduces product yield and quality.
High Purity Requirements
Electronic-grade VC needs ≥99.99% purity. Distillation’s separation factor decreases with purity, leading to exponential energy consumption growth.
Energy Consumption Comparison (99.995% VC Purity)
Energy consumption comparison: Distillation vs. Ideal Low-Temp Separation (for 99.995% VC)
III.VC Production Technology Solution
To address traditional distillation challenges, DODGEN has adopted Melt Crystallization Technology and Melt Crystallization-Distillation Coupling Process, improving product quality and reducing energy consumption significantly.
Technology Principle
Unlike distillation (based on boiling point differences), melt crystallization separates components by melting point differences. The process has two core steps:
- Crystallization: Molten liquid is cooled; target component reaches supersaturation, nucleates, and grows into crystals.
- Sweating: Trapped/adhered impurities are removed from crystal surfaces by mild heating, ensuring high purity (multi-stage process for electronic-grade VC).
Five Core Advantages
Energy Efficiency
Latent heat of melt crystallization is 1/7-1/3 of distillation’s vaporization heat. Total energy consumption is only 10%-30% of distillation.
Low-Temperature Operation
Normal pressure + low temp avoids volatilization/pollution. Simpler, safer, and lower equipment/material costs (reduced corrosion).
Ultra-High Purity
Separation factor is not affected by purity. Proven to achieve ≥99.999% purity for electronic-grade carbonates.
No Solvent Introduction
Avoids solvent contamination and recovery costs. Eliminates carbonization/coking issues common in distillation of heat-sensitive materials.
Suitable for Special Materials
Ideal for isomers/heat-sensitive substances (e.g., VC) with significant melting point differences, where distillation fails.
