Polyol Solvent Extraction for Perfume Concrete Odor Purity
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Solution Overview
Problem
Current methods for extracting perfume concretes and absolutes using non-renewable solvents like n-hexane result in chemical odors and less pleasant fragrances, with unsatisfactory yields and potential environmental harm.
Innovation Solution
A process employing a first system of solvents comprising organic (poly)ol solvents with specific boiling points, which are brought into contact with fresh, withered, or dry solid natural materials to extract perfume concretes and absolutes without altering the natural odor and with improved yields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-polar volatile solvents like n-hexane are used for extraction, then extraction efficiency and solubilizing power are improved, but chemical odor and environmental harm worsen
Solution Approach 1:
The patent changes the chemical parameters of the extraction solvent from non-polar volatile solvents (n-hexane) to polar solvents with specific boiling point ranges (83-190°C). This parameter change maintains extraction efficiency while eliminating the harmful chemical odor associated with petroleum ether and n-hexane, as the new solvents produce no solvent-type odor in the final extract.
Solution Approach 2:
The patent converts the potential harm of using conventional solvents into benefit by selecting solvents whose physical properties (boiling point, polarity) naturally prevent harmful chemical odors. The higher boiling point solvents allow for complete evaporation without leaving residual petroleum ether odors, turning a limitation into an advantage for producing clean, natural-smelling extracts.
2Productivity
If non-renewable solvents like n-hexane are used, then extraction yield is improved, but environmental friendliness worsens
Solution Approach 1:
The patent changes the origin parameter of the solvent from non-renewable petroleum-derived solvents to renewable solvents with specific boiling point characteristics. This maintains high extraction yields while improving environmental sustainability, as the renewable solvents can be derived from natural sources and degrade without persistent environmental harm.
3Ease of manufacture
If low boiling point solvents are used, then easy vacuum distillation is improved, but solvent odor persistence worsens
Solution Approach 1:
The patent optimizes the boiling point parameter to a specific range (83-190°C) that balances easy removal with complete evaporation. Solvents in this range are sufficiently volatile for easy vacuum distillation but have high enough boiling points to ensure complete evaporation without leaving persistent chemical odors, unlike lower boiling point petroleum ether.
4Speed
If conventional extraction solvents are used, then extraction speed is improved, but fragrance quality and naturalness worsen
Solution Approach 1:
The patent changes the polarity and boiling point parameters of the extraction solvent to match better with the target fragrance compounds. The polar solvents with controlled boiling points extract odorous molecules more selectively and completely, preserving the natural fragrance profile without introducing petroleum ether odors, thus improving both extraction speed and fragrance quality.
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 process achieves long-lasting, powerful fragrances that remain close to the natural material's scent, with improved extraction yields and stability against external factors like light and temperature.
Implementation Method 1
extraction by non-polar volatile solvents, such as n-hexane, represents, for certain natural raw materials, a good technique for the extraction of odorous molecules
Implementation Method 2
Separation by settling and then the evaporation under vacuum of the solvent 1 make it possible to obtain the 'concrete'
Implementation Method 3
lower boiling point than water and easy vacuum distillation
Data Source
AI summary
The present invention relates to a process for preparing perfume concrete and/or absolute which employs bringing particular, fresh, withered or dry, solid natural material(s) into contact with a first system of solvents comprising at least one “green” organic (poly)ol solvent. Another subject of the invention is the perfume concrete and the perfume absolute obtained by the preparation process, a composition comprising the concrete and/or the absolute, and the use of the “green” organic (poly)ol solvent to extract the concrete and/or the absolute with no chemical odour of solvent odour type.