Melatonin Extraction from Hypericum Perforatum Using Multi-Step Purification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for extracting melatonin from Hypericum perforatum often result in high impurities such as polyphenolic substances, making it desirable to develop methods that minimize these impurities and achieve high-purity melatonin extracts.
Innovation Solution
A multi-step method involving mixing Hypericum perforatum powder with a solvent, filtering, concentrating, crystallizing, purifying, and recrystallizing to produce a high-purity melatonin extract with at least 95% melatonin by weight, while minimizing impurities like hyperforin, hypericin, and melatonin derivatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If melatonin is extracted from Hypericum perforatum using conventional methods, then melatonin can be obtained, but the product contains high levels of impurities such as polyphenolic substances (hyperoside andhypericin)
Solution Approach 1:
The extraction process is divided into multiple sequential steps: initial extraction, filtration, concentration, crystallization, and purification. Each step segments the overall process to progressively separate melatonin from impurities, transforming a single complex extraction into manageable stages that collectively achieve high purity
Solution Approach 2:
The patent systematically extracts and removes harmful impurities at different stages: polyphenolic substances are removed during filtration and concentration, while crystallization specifically extracts pure melatonin crystals from the concentrate, separating them from remaining impurities in the mother liquor
Solution Approach 3:
The process utilizes parameter changes including temperature variations during concentration and crystallization, solvent composition adjustments, and pH control to optimize melatonin precipitation while keeping impurities in solution or as removable solids
2Manufacturing precision
If multiple purification steps are added to remove impurities, then product purity increases, but process complexity increases
Solution Approach 1:
Multiple purification functions are merged into integrated operation sequences: filtration and concentration are combined in a continuous process, and crystallization simultaneously achieves both concentration of melatonin and separation from impurities, reducing the need for separate dedicated equipment for each function
Solution Approach 2:
The crystallization process is designed to be self-purifying, where melatonin automatically crystallizes in pure form from the concentrate, and the mother liquor containing impurities is simply decanted or filtered off, eliminating the need for complex additional purification equipment
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
The method effectively removes impurities, achieving high-purity melatonin extracts with minimal hyperforin, hypericin, and melatonin derivatives, ensuring safer and more effective melatonin products.
Implementation Method 1
mixing Hypericum perforatum powder with a first solvent to produce an extraction solution
Implementation Method 2
filtering the extraction solution to produce a filtered solution
Implementation Method 3
concentrating the filtered solution to obtain a crude extract of melatonin
Implementation Method 4
crystallizing the crude extract of melatonin to produce a crystallized solid
Implementation Method 5
purifying the crystallized solid to obtain an intermediate product
Implementation Method 6
heating and recrystallizing the intermediate solution to obtain a high purity melatonin extract
Data Source
AI summary
Embodiments of the present disclosure relate to methods for extracting and purifying melatonin from natural melatonin sources. Such methods may include extracting melatonin from Hypericum perforatum or from tomatoes. Such methods may include mixing the melatonin source with a first solvent; filtering the extraction solution; and concentrating the filtrate to obtain coarse extract. Compositions of the melatonin extract obtained from the methods are also provided.