SSP of Small Particles and Powders

This discontinuous process is based on a heat-jacketed reactor equipped with an agitator, an inlet for purging nitrogen and the addition of an oil, and a cooler. A cold trap condenses and separates the oil from the gas for re-use in the reactor. 

The oil has to be removed from the SSP product by extraction or flushing with appropriate solvents such as acetone. The degree of swelling influences abrasion and the loss of fines, as well as a certain tendency to a form of sticking or adhesion. At present, this method does not appear to have been fully commercialized. 

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