Microwave Drying Process for Polysaccharides
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Solution Overview
Problem
Conventional drying methods for polysaccharides are inefficient and can degrade the material, requiring long times and cautious temperature control to prevent degradation, which limits productivity and increases energy consumption.
Innovation Solution
A microwave irradiation process is used to dry polysaccharides under controlled conditions of temperature, pressure, and solvent composition, allowing for rapid removal of solvents without degrading the polysaccharides, with specific parameters such as microwave power density, solvent selection, and reduced pressure to maintain the material's physical and chemical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional heating drying methods are used, then the polysaccharides can be dried, but the drying time becomes very long (12 hours or more) and the material may degrade
Solution Approach 1:
The patent replaces conventional thermal heating with microwave irradiation. The microwave energy directly excites the solvent molecules (water and organic solvents) to vibrate and generate heat internally, rather than heating from the outside. This substitution of heating mechanism enables rapid drying while maintaining temperature control to prevent polysaccharide degradation.
Solution Approach 2:
The patent changes the drying parameters by using microwave irradiation instead of conventional heating, and by controlling the temperature within a specific range (10-70°C) while applying reduced pressure (10-100 mbar). These parameter changes enable rapid solvent removal without degrading the polysaccharide structure.
2Productivity
If high temperature heating is applied to speed up drying, then drying time is reduced, but the polysaccharides are degraded
Solution Approach 1:
The patent uses microwave irradiation to replace conventional high-temperature heating. Microwave energy directly excites solvent molecules, enabling rapid drying at lower temperatures (10-70°C) rather than requiring high temperatures to speed up the process. This maintains polysaccharide structural integrity while achieving fast drying.
Solution Approach 2:
The patent employs controlled microwave irradiation with periodic heating cycles under reduced pressure. The temperature is maintained within a controlled range (10-70°C) rather than continuously high heating, allowing rapid solvent removal while preventing thermal degradation of the polysaccharide structure.
3Quantity of substance
If conventional drying methods are used, then solvents can be removed, but the process requires very long times and high energy consumption
Solution Approach 1:
The patent replaces conventional thermal drying with microwave irradiation. Microwave energy directly excites solvent molecules (water and organic solvents with tan δ > 0.1) to vibrate and generate internal heat, enabling rapid solvent evaporation. This substitution reduces drying time from 12 hours or more to much shorter periods while maintaining effective solvent removal.
Solution Approach 2:
The patent utilizes phase transition of solvents from liquid to vapor through microwave-induced heating. By applying microwave irradiation under reduced pressure (10-100 mbar), the solvent undergoes rapid phase change from liquid to vapor state, enabling fast removal of solvents without requiring prolonged heating times.
4Reliability
If conventional drying methods are used, then the drying process can be performed, but it requires cautious temperature control and very long times
Solution Approach 1:
The patent replaces conventional thermal heating with microwave irradiation, which provides more uniform and controllable heating. The microwave energy can be precisely controlled to maintain temperature within 10-70°C, ensuring reliable preservation of polysaccharide properties while significantly improving drying efficiency and reducing processing time.
Solution Approach 2:
The patent implements controlled microwave irradiation with temperature monitoring and pressure control (10-100 mbar). The system maintains temperature within a specific range through feedback control, ensuring that polysaccharide properties are preserved while achieving efficient drying. This controlled approach replaces the need for very long drying times with precise parameter control.
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 significantly reduces drying time by up to 50 times compared to conventional methods, improves productivity, and preserves the polysaccharides' properties, ensuring non-destructive drying and reduced energy consumption.
Implementation Method 1
the material is submitted to microwave irradiations under conditions which do not degrade said polysaccharide
Implementation Method 2
a final drying step is carried out for removing solvents used during the reaction and/or the washing steps
Data Source
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AI summary
The present invention is directed to a process for drying a material comprising at least one polysaccharide, said process comprising a step wherein the material is submitted to microwave irradiations under conditions which do not degrade said polysaccharide.