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Vacuum drying is the mass transfer operation in which the moisture present in a substance, usually a wet solid, is removed by means of creating a vacuum.
In chemical processing industries like food processing, pharmacology, agriculture, and textiles, drying is an essential unit operation to remove moisture.[1] Vacuum drying is generally used for the drying of substances that are hygroscopic and heat-sensitive, and is based on the principle of creating a vacuum to decrease the chamber pressure below the vapor pressure of the water, causing it to boil. With the help of vacuum pumps, the pressure is reduced around the substance to be dried. This decreases the boiling point of water inside that product and thereby increases the rate of evaporation significantly. The result is a significantly increased drying rate of the product.[2] The vacuum drying process is a batch operation performed at reduced pressures and lower relative humidity compared to ambient pressure, enabling faster drying.
^Figiel, A; Michalska, A (2016). "Overall Quality of Fruits and Vegetables Products Affected by the Drying Processes with the Assistance of Vacuum-Microwaves". International Journal of Molecular Sciences. 18 (1): 71. doi:10.3390/ijms18010071. PMC 5297706. PMID 28042845.
^Saraswathi B. "Vacuum dryer". www.pharmainfo.net. Retrieved 2016-04-05.
is an essential unit operation to remove moisture. Vacuumdrying is generally used for the drying of substances that are hygroscopic and heat-sensitive...
thickness. Spray drying belongs in this category. Indirect or contact drying (heating through a hot wall), as drum drying, vacuumdrying. Again, higher...
freeze-drying. Compared to other drying methods like room temperature drying, hot-air drying, and solar drying, Robusta coffee beans that were freeze-dried contained...
change among other thermal drying methods, along with a faster drying rate compared to freeze drying. Vacuum microwave not only dries the mango quickly, it...
operate in outer space (for example) or for processes such as vacuumdrying or vacuum coating. Chambers are typically made of metals which may or may...
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vacuum oven can be used for drying biomass much more efficiently than drying alone. Similarly, microwave-vacuumdrying has shown potential for drying...
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as the Huzenlaub Process. The whole grain is vacuum-dried, then steamed, followed by another vacuumdrying and husking. This also makes the rice more resistant...
A vacuumdry box is a piece of safety equipment which can provide an inert, or controlled atmosphere for handling sensitive materials. These devices can...
also be accomplished by decantation and centrifugation followed by vacuumdrying; or direct from cream by breaking the emulsion followed by centrifugation...
A vacuum (pl.: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective vacuus (neuter vacuum) meaning "vacant" or "void"...
including for dry (oil-free) vacuum pumps, and produces equipment used for manufacturing semiconductors, scientific research, freeze drying and other industries...
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an almost-dry sample. Where a desiccator alone is unsatisfactory, the sample may be dried at elevated temperature using Abderhalden's drying pistol. The...
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drying room is a room intended for drying objects. It can act as a replacement or complement for drying cabinets, tumble-dryers, and outdoor drying....
also claims that the dihydrate can be reduced to the anhydrous form by vacuumdrying at about 50 °C, yielding a solid that showed no decomposition after...
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between...
fried, vacuum fried, dehydrated or baked. Apple chips may have a dense and crispy texture or may be puffed, yet still crispy. Microwave vacuum-drying may...
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machine, brush applicator, or compression sprayer. Dry residue is vacuumable immediately (20-30 min. drying time), either separately or from a built-in unit...
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flexible and economically viable procedures such as vacuum and freeze drying. Once the garlic cloves are dried and dehydrated, they are powdered using large...
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