Ectoine Purification via Cation Exchange and Hot Methanol Crystallization
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Solution Overview
Problem
Current methods for purifying ectoine from fermentation broths are costly and complex, often resulting in low yields and the presence of by-products such as hydroxyectoine, which complicates the purification process.
Innovation Solution
A process involving passing the fermentation broth through a cation exchange resin to capture ectoine, followed by concentration and drying to obtain raw crystals, which are then dissolved in hot methanol, filtered, and crystallized to recover high purity ectoine crystals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional purification methods are used, then ectoine can be recovered from fermentation broth, but the process is costly and complex with low yields and presence of by-products
Solution Approach 1:
The patent extracts and removes the problematic by-product hydroxyectoine from the fermentation broth through selective crystallization. By controlling temperature and solvent conditions, hydroxyectoine is preferentially extracted and removed, leaving high-purity ectoine in the mother liquor, thus resolving the contradiction between achieving high purity and maintaining process simplicity
Solution Approach 2:
The patent changes physical parameters (temperature, solvent composition, pH) to optimize the purification process. By adjusting these parameters, the solubility differences between ectoine and hydroxyectoine are maximized, enabling efficient separation without complex equipment, thereby achieving high purity with a simple process
2Manufacturing precision
If conventional purification methods are used, then ectoine can be recovered from fermentation broth, but the yields are low
Solution Approach 1:
The patent implements a continuous purification approach where fermentation broth is processed through a series of sequential steps (adjustment, crystallization, filtration, concentration) without interruption. The mother liquor from one cycle is reused in subsequent cycles, maintaining continuous productive action and maximizing ectoine recovery yield while ensuring high purity
Solution Approach 2:
The patent selectively discards the hydroxyectoine by-product through controlled crystallization and filtration, while recovering and concentrating the ectoine-rich mother liquor for further processing. This selective discarding and recovering strategy maximizes both purity and overall yield by preventing loss of ectoine in waste streams
3Quantity of substance
If halophilic bacteria are used for ectoine production, then ectoine can be produced, but high salt levels cause equipment corrosion and increase downstream processing complexity
Solution Approach 1:
The patent extracts and removes salt from the fermentation broth through controlled crystallization and filtration processes. By adjusting temperature and solvent conditions, salt is preferentially separated from the ectoine-containing solution, reducing salt concentration to non-corrosive levels and simplifying downstream processing while maintaining ectoine production efficiency
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 method achieves high purity ectoine crystals with at least 98% dry weight composition and less than 2% by-products, specifically minimizing the presence of hydroxyectoine, thus simplifying the purification process and reducing costs.
Implementation Method 1
Passing the fermentation broth through a cation exchange resin to capture ectoine
Implementation Method 2
Dissolving the raw crystals into hot methanol
Implementation Method 3
Crystallizing the ectoine by cooling of the filtered methanol-ectoine mixture
Implementation Method 4
Concentration and drying of the solution to obtain raw crystals
Data Source
AI summary
The present invention relates to a process for the extraction and purification of ectoine from a fermentation broth, comprising at least the successive steps of: a) Passing said fermentation broth through a cation exchange resin able to capture ectoine, and eluting ectoine, to obtain an ectoine aqueous solution; b) Concentrating said ectoine aqueous solution and then drying it, to obtain raw crystals of ectoine; c) Dissolving said raw crystals of ectoine into hot methanol; d) Hot filtrating said methanol-ectoine mixture; e) Crystallizing ectoine by cooling of the filtered methanol-ectoine mixture, and recovering high purity ectoine crystals.