Drying microwaves

Now that the mixture is nice and cold, filter the crystal mass. As in the fertilizer extraction, squeeze out the liquid from the filtered crystal mass, and put it on a dish for air drying. Once air dried, microwave the mass until dry and crunchy. Then blender grind it with shaking, and pour the powder into a sealable plastic container. The yield is about 600 grams of ammonium nitrate for each pint of nitric acid used. 

Water-based coatings require a drying treatment. The application of microwave furnaces for this purpose gives operational advantages over the use of ambient or heated air drying. Microwaves of 2450 MHz frequency are used, and have the following properties ... 

Rapid methods Many more rapid techniques are used to monitor moisture content for quality control purposes. These include rapid infrared (IR) drying, microwave drying, and electrical methods. For both the IR and microwave methods, equipment is available with built-in balances, digital displays and microcomputers to calculate moisture content. 

The diyne (20 mg, 0.13 mmol), nitrile (1.3 mmol), dry toluene (4mL), and CpCo(CO)2 (1.56 pL, 0.013 mmol) were added to a flame dried microwave vial equipped with a stir bar. The vial was flushed with nitrogen, capped with a microwave vial septum and irradiated for 20 min in a... 

In case of microwave drying it is very important to have a reliable instrumentation. With a view on the needs of the product the interesting values are the holding time of the product inside the dryer, the amount of microwave radiation, the amount of stripping gas and the pressure inside the dryer. Not all products need a very precise holding time due to the special behavior of microwaves. Normally, microwaves affect materials that contain a minimum amount of water or other suitable liquids. When the product is dried microwaves lose the ability to affect the material. Primarily, the drying and heating will occur where it is needed and wanted (9,11). 

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