Chitin Coagulation from Ionic Liquids Using Kosmotropic Salts
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Solution Overview
Problem
The current industrial chitin-extraction process is energy-intensive and uses harsh chemicals, leading to depolymerization and changes in the molecular weight and degree of acetylation of chitin, while the use of ionic liquids for extraction is limited by high costs and the need for effective recycling methods.
Innovation Solution
The use of kosmotropic salts to coagulate chitin from ionic liquid solutions, facilitating the recycling of ionic liquids and minimizing losses, thereby providing a more efficient and cost-effective method for extracting high molecular weight chitin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ionic liquids are used for chitin extraction, then high molecular weight chitin can be extracted, but the cost increases and recycling becomes necessary
Solution Approach 1:
The patent implements a recycling system where ionic liquid is recovered from the extraction process through anti-solvent precipitation. The ionic liquid-chitin complex is treated with water or alcohol to precipitate chitin, allowing the ionic liquid to be separated, purified, and reused multiple times, thereby reducing operational costs while maintaining high molecular weight chitin extraction capability
Solution Approach 2:
The patent introduces anti-solvents (water or alcohol) as intermediary substances to facilitate the separation of chitin from the ionic liquid. These intermediaries cause selective precipitation of chitin while leaving the ionic liquid in solution, enabling efficient recovery and recycling of the expensive ionic liquid solvent
2Productivity
If anti-solvent (water) is added to isolate chitin, then chitin can be recovered, but ionic liquid losses occur
Solution Approach 1:
The patent establishes a continuous recycling process where ionic liquid is repeatedly reused across multiple extraction cycles. The systematic recovery and purification steps ensure the ionic liquid remains in continuous circulation rather than being discarded, minimizing losses while maintaining high chitin isolation efficiency through sustained operational use
Solution Approach 2:
The patent employs controlled parameter changes during the precipitation step, specifically adjusting temperature and anti-solvent addition rates, to optimize chitin recovery while minimizing ionic liquid solubility in the aqueous phase. These parameter optimizations reduce ionic liquid losses during the isolation process
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the isolation of high molecular weight chitin with reduced water uptake and protein content, simplifying the recycling of ionic liquids and improving the purity and molecular integrity of the chitin product.
Implementation Method 1
The disclosed subject matter relates to compositions and to methods of isolating chitin from chitinous biomass. In particular examples, disclosed herein are methods for coagulating chitin from ionic liquid solutions using kosmotropic salts.
Implementation Method 2
facilitating the recycling of ionic liquids and minimizing losses
Data Source
AI summary
Methods for separating chitin from a chitinous biomass are described, the methods comprising contacting the chitinous biomass with an ionic liquid to form a mixture comprising chitin; contacting the mixture with an aqueous solution of a kosmotropic salt, thereby coagulating the chitin and forming an biphasic system comprising an ionic liquid-chitin phase and an aqueous kosmotropic salt phase; separating the ionic liquid-chitin phase from the aqueous kosmotropic salt phase; and collecting the chitin from the separated ionic liquid-chitin phase, thereby forming a recycled ionic liquid.