Organic Solvent Dehydration via Molecular Sieve Adsorption
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Solution Overview
Problem
Current methods for dehydrating organic solvents are inefficient and costly, requiring large amounts of dehydrating agents and high energy consumption, especially on a large scale, and are prone to clogging and material deterioration during regeneration.
Innovation Solution
A device and process using a solid matrix of adsorbent material with halogenated hydrocarbons like HFCs and HFOs for regeneration, which allows for continuous and efficient water removal from organic solvents at ambient temperatures, reducing energy consumption and extending the life of dehydrating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distillation systems are used to dehydrate organic solvents, then high solvent purity can be achieved, but the equipment size and energy consumption increase significantly
Solution Approach 1:
The patent employs molecular sieves with specific pore sizes (3A, 4A, 5A, 13X) that selectively adsorb water molecules from organic solvents based on molecular size and polarity. The porous structure allows water to enter and be retained while excluding larger solvent molecules, achieving dehydration without thermal energy input required by distillation
Solution Approach 2:
The invention replaces the thermal-mechanical distillation system with a chemical adsorption system using molecular sieves. Instead of using heat and fractionation columns, the process uses solid adsorbent materials that chemically bind water molecules, eliminating the need for high-energy heating equipment while maintaining effective water removal
2Manufacturing precision
If molecular sieves and zeolites are used for dehydration, then water removal is effective, but large quantities of dehydrating material are required for large-scale operations
Solution Approach 1:
The patent implements a cyclic operation where molecular sieves are alternately used for dehydration and then regenerated by heating. The system switches between multiple beds - one performing dehydration while others are being regenerated - ensuring continuous operation with reduced total material quantity. This periodic cycling allows the same material to be reused multiple times
Solution Approach 2:
The invention recovers and regenerates spent molecular sieves through periodic heating treatment. After saturation with water, the dehydrating material is heated to drive off absorbed water, restoring its dehydration capacity. This recovery process eliminates the need to continuously add large quantities of fresh dehydrating material, reducing overall material consumption while maintaining effective dehydration
3Manufacturing precision
If thermal regeneration is applied to dehydrating materials, then water can be removed from the material, but high temperatures cause progressive deterioration of the material
Solution Approach 1:
The patent optimizes regeneration parameters by controlling heating temperature and duration. Instead of using excessively high temperatures, the system applies moderate heat (typically 100-200°C) for controlled periods, or uses vacuum-assisted desorption at lower temperatures. This parameter optimization achieves effective water removal from molecular sieves while minimizing thermal stress and structural degradation, thereby extending material operational life
4Quantity of substance
If dehydration towers are used for large-scale dehydration, then the volume of material needed is reduced, but the systems are prone to clogging and high energy consumption
Solution Approach 1:
The patent employs periodic cycling between multiple dehydration beds, allowing each bed to be regenerated offline while others remain in service. This eliminates continuous operation under high stress conditions that cause clogging, as each bed undergoes periodic restoration. The alternating use of multiple beds ensures continuous reliable operation without the accumulation of issues that plague single continuous towers
Solution Approach 2:
The invention introduces a regenerating agent (such as heated inert gas or vacuum) that acts as an intermediary to remove water from saturated molecular sieves without requiring the dehydrating material itself to undergo harsh conditions. This intermediary mechanism enables gentle regeneration that prevents clogging and maintains system reliability while still achieving effective water removal
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 approach significantly reduces water content in organic solvents, minimizes the use of dehydrating agents, and lowers operational costs while maintaining the effectiveness of the dehydrating material over multiple regeneration cycles.
Implementation Method 1
solid adsorbent dehydrating material... the solvent to be dehydrated is passed through the dehydrating material... water is absorbed in this material
Implementation Method 2
an extraction solvent is passed through the material in order to extract the water from this material
Implementation Method 3
regeneration of the extraction solvent by evaporation, compression and subsequent recondensation
Implementation Method 4
regeneration of the extraction solvent by evaporation, compression and subsequent recondensation
Implementation Method 5
regeneration of the extraction solvent by evaporation, compression and subsequent recondensation
Data Source
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AI summary
The present invention relates to a highly efficient and versatile device for dehydrating organic solvents, and to the related process implemented with such a device, useful for dehydrating organic solvents, in particular for removing or reducing the water content in mixtures of organic solvents.