Heating Aromatic Compounds in Polyol for Supersaturated Stability
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Solution Overview
Problem
Existing methods for solubilizing hardly water-soluble aromatic compounds are either costly, require high-pressure equipment, or do not provide sufficient solubility and stability, limiting their application in products like cosmetics and pharmaceuticals.
Innovation Solution
A method involving heating a mixture of a hardly water-soluble aromatic compound, a polyol, and an aqueous medium at normal pressure between 50°C to less than 100°C, followed by cooling and dilution with water to maintain the compound's solubility above saturation levels without deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If aromatic compounds are dissolved in alcohols to improve solubility, then solubility is improved, but skin irritation occurs and application is limited
Solution Approach 1:
The invention changes the physical parameters of the system by heating the mixture to 50-100°C during manufacturing, which temporarily increases solubility to achieve high concentration dissolution, then cooling it to room temperature to maintain stability. This parameter change approach allows achieving high solubility without using irritating alcohols as solvents.
Solution Approach 2:
The invention creates a composite aqueous system by combining polyol (hydrophilic component) and aromatic compound (hydrophobic component) in specific ratios. This composite approach forms a stable homogeneous mixture that achieves high solubility of the aromatic compound in water without requiring alcohol solvents, thereby eliminating skin irritation while maintaining high concentration.
2Quantity of substance
If heating temperature is increased to improve solubility of aromatic compound, then solubility is improved, but equipment complexity and cost increase due to pressure requirements
Solution Approach 1:
The invention optimizes the temperature parameter within a specific range (50-100°C) that is high enough to achieve sufficient solubility improvement but low enough to avoid pressure buildup. This controlled parameter change allows using simple atmospheric pressure equipment instead of complex pressure-resistant reactors, reducing equipment complexity and cost while still achieving high solubility.
3Quantity of substance
If concentration of aromatic compound is increased above saturation solubility, then solubility and productivity are improved, but deposition occurs reducing stability
Solution Approach 1:
The invention performs preliminary heating treatment before final product formation. By heating the mixture to 50-100°C during the manufacturing process, the aromatic compound is pre-dissolved at high temperature to achieve concentration above room-temperature saturation solubility. This preliminary action ensures uniform dissolution before cooling, preventing subsequent deposition and maintaining long-term stability even at supersaturated concentrations.
Solution Approach 2:
The invention utilizes temperature parameter changes during the manufacturing process. The mixture is heated to 50-100°C to achieve high solubility and dissolve the aromatic compound at concentrations above room-temperature saturation, then cooled to room temperature where the compound remains stable without deposition. This controlled parameter change allows maintaining supersaturated stable solutions that would otherwise precipitate.
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 effectively suppresses deposition of the aromatic compound, ensuring stability and high solubility, thus enhancing its usability in various products without the need for costly equipment or surfactants.
Implementation Method 1
heating the material for heating at normal pressure at a temperature of from 50 to less than 100°C
Implementation Method 2
a content of a surfactant in the material for heating is 0.1 mass % or less, and a content of the (A) hardly water-soluble aromatic compound in the material for heating is below a saturation solubility
Implementation Method 3
obtaining a hardly water-soluble aromatic compound solution 2 by cooling the hardly water-soluble aromatic compound solution 1 to 0 to 35°C, followed by adding water
Data Source
Figure 1
AI summary
To provide a new method for producing a composition containing a hardly water-soluble aromatic compound, the composition having outstanding hardly water-soluble aromatic compound. A method for producing a composition containing a hardly water-soluble aromatic compound, comprising: Step (1) of obtaining a hardly water-soluble aromatic compound solution 1, Step (1) comprising Step (1-1) of preparing a material for heating comprising (A) a hardly water-soluble aromatic compound, (B) a polyol, and (C) an aqueous medium, and Step (1-2) of obtaining a heated solution containing a hardly water-soluble aromatic compound by heating the material for heating at normal pressure at a temperature of less than 100°C; and Step (2) of obtaining a hardly water-soluble aromatic compound solution 2 by adding water to the hardly water-soluble aromatic compound solution 1 such that the hardly water-soluble aromatic compound solution 2 has a concentration of the (A) hardly water-soluble aromatic compound above a saturation solubility at 25°C, wherein, in Step (1), a content of a surfactant in the material for heating is 0.1 mass% or less and a content of the (A) hardly water-soluble aromatic compound in the material for heating is below a saturation solubility of the (A) hardly water-soluble aromatic compound in a solvent having the same composition at 25°C.