Abstract
The drying of materials is often the final operation in a manufacturing process, carried out immediately prior to packaging or dispatch. Drying refers to the final removal of water, or another solute, and the operation often follows evaporation, filtration, or crystallisation. In some cases, drying is an essential part of the manufacturing process, as for instance in paper making or in the seasoning of timber, although, in the majority of processing industries, drying is carried out for one or more of the following reasons:(a) To reduce the cost of transport.(b) To make a material more suitable for handling as, for example, with soap powders, dyestuffs, and fertilisers.(c) To provide definite properties, such as, for example, maintaining the free-flowing nature of salt.(d) To remove moisture which may otherwise lead to corrosion. One example is the drying of gaseous fuels or benzene prior to chlorination.
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