Solvent extraction and alkali treatment for glycerol purification

Overview

This innovative approach utilizes a two-phase process to enhance the purity of crude glycerol by significantly reducing its free fatty acid (FFA) content. The method involves selective solvent extraction followed by alkali and adsorbent treatment. This process not only improves the purity of glycerol but also enhances its industrial value and marketability, supporting sustainable and high-quality industrial practices.

Technical specifications

The process begins with solvent extraction, where FFAs are selectively dissolved in a compatible solvent, separating them from the glycerol phase. This is followed by an alkali treatment, where residual FFAs are neutralized to form soaps. These soaps are then removed using an adsorbent, further purifying the glycerol. Key features include:

• Solvent extraction: Efficient phase separation by preferentially migrating FFAs to the solvent phase.
• Alkali treatment: Neutralization of FFAs to form soaps, removed with adsorbents.
• Purity analysis: FFA content is analyzed using the AOCS titration method.

Technology readiness level

This technology is at TRL 5, indicating that it has been validated in a relevant environment. Future plans include optimizing the method for cost-effectiveness and scalability, with a timeline of 6-8 months for further validation and potential industrial application.