Near-Freezing Liquid Separation by Miscibility Depression
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Solution Overview
Problem
Current methods do not effectively utilize near freezing liquid-liquid interactions to separate partially or fully miscible liquids, despite the partial miscibility approaching zero at the freezing temperature of a component.
Innovation Solution
A process that brings a mixture of components near the freezing temperature of the product component to induce immiscibility, allowing separation into a product component-rich liquid phase and a product component-depleted liquid phase in a separation vessel, using techniques such as decanting, centrifuging, or enhanced-gravity settling, while minimizing turbulence to promote stable phase formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the temperature is reduced near the freezing point of the product component, then the miscibility between product component and carrier component decreases (improving separation), but the risk of solid crystallization increases (potential harm)
Solution Approach 1:
The process utilizes temperature as a critical parameter, cooling the liquid mixture to near the freezing point of the product component. This parameter change induces immiscibility between the product and carrier components, enabling separation while carefully controlling the temperature to prevent solid crystallization.
Solution Approach 2:
The invention exploits the phase transition behavior of liquid mixtures near the freezing point. As temperature approaches the freezing point, the mixture transitions from a miscible liquid state to an immiscible liquid-liquid system, creating distinct phases that can be separated. The process operates in the critical temperature region where phase behavior changes dramatically.
2Quantity of substance
If conventional separation methods are used for miscible liquids, then separation can be achieved, but the process complexity and energy consumption increase
Solution Approach 1:
The process allows the mixture to self-separate into immiscible phases through temperature-induced density and miscibility changes. Once cooled to the critical temperature region, the components naturally stratify into distinct liquid phases without requiring complex separation equipment or additional chemical agents, simplifying the overall separation 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
Effectively separates components by exploiting the immiscibility near the freezing temperature, achieving efficient separation of mixtures that are partially miscible above the freezing point, with the carrier component and product component differing in properties such as dipole moment, size, or hydrogen bonding characteristics.
Implementation Method 1
The mixture is brought substantially near a temperature at which the product component freezes such that the mixture becomes a liquid or remains a liquid. The product component and the carrier component are essentially immiscible substantially near the temperature.
Implementation Method 2
A solid crystallizes when it freezes in a solution, which involves molecules of one type falling into a regular orientation with one another to the exclusion of all different molecules.
Implementation Method 3
The suspended solid may be melted substantially near the temperature to form a liquid mixture.
Data Source
AI summary
A process for separating a mixture of components is disclosed. A liquid mixture is provided to a separation vessel substantially near a temperature at which a product component freezes. The liquid mixture comprises the product component and a carrier component. The product component and the carrier component are essentially immiscible substantially near the temperature. The liquid mixture is separated into two or more phases, the two or more phases comprising a product component-rich liquid phase and a product component-depleted liquid phase. In this manner, a mixture of components is separated.