DEXSORB cyclodextrin polymer for selective removal of organic compounds in coconut water

Overview

DEXSORB is a plant-derived, cyclodextrin-based adsorbent developed by Cyclopure, Inc. that selectively removes trace organic compounds through host-guest complexation in uniform 0.78 nm cavities. The technology is being adapted to refine coconut water by selectively capturing flavor and aroma compounds while leaving sugars, electrolytes, and salts intact. This addresses a key challenge in beverage processing: improving taste and sensory quality without diminishing nutritional value.

DEXSORB is NSF 61 certified for drinking water treatment and has been validated across multiple industries, including micropollutant removal, solvent purification, decaffeination, citrus filtration, and pharmaceutical purification. Its size-exclusion mechanism provides molecular selectivity and resistance to fouling, enabling high capacity and consistent performance. For beverage producers, this translates into a tunable, scalable separation tool that can be integrated into existing filtration workflows.

Technical specifications

Key features:

• Molecular selectivity: 0.78 nm cyclodextrin cavities capture target organic compounds while excluding larger molecules such as sugars and salts
• Ionic preservation: Size-exclusion mechanism maintains electrolyte and mineral content in treated liquids
• Fouling resistance: Uniform pore structure reduces fouling and sustains adsorption capacity over multiple cycles
• Safety certification: NSF 61 certified for drinking water applications
• Renewable feedstock: Plant-derived, sustainable adsorbent material
• Format flexibility: Available as powder for batch adsorption and granules for packed-bed column filtration
• Reusability: Media design supports regeneration and reuse, reducing operating costs

How it works:

DEXSORB functions through host-guest complexation, where organic molecules of compatible size and chemistry are captured within the cyclodextrin cavities. Molecules outside the target size range pass through unaffected. This mechanism enables selective removal of bitter or off-flavor compounds without stripping beneficial nutrients. The same principle has been demonstrated in orange juice filtration with a leading beverage firm.

Technology readiness level

DEXSORB is commercially deployed in water treatment and is undergoing NSF certification for a commercial water filter. Separation applications for solvent purification and decaffeination have been validated with industrial partners. Removal of bitter flavor compounds from fruit juice has been confirmed in a project with a major beverage company, providing a strong proof-of-concept foundation for coconut water applications.

The proposed coconut water program will advance the application through three stages over approximately six months: batch adsorption testing with DEXSORB powder to measure capacity and kinetics for flavor and aroma compounds, column evaluation using DEXSORB granules to assess performance in a packed-bed configuration, and analytical confirmation that sugars and salts remain unchanged after treatment. Cyclopure has in-house analytical capabilities for flavor compound testing. Cost projections will follow once removal performance and treatment requirements are defined with the partner. The technology is at a stage where collaborative pilot work can rapidly confirm commercial viability for beverage processing.