A new dry-sweating technique, based on the use of a centrifuge was applied to purify solid particles of E-caprolactam. It allows elimination of up to 80% of the organic impurities with a relatively low molten mass, between 20 and 30%. Experimental runs were carried out on specifically produced solid pastilles and solid particles of industrial material. On the basis of the achieved results, a mechanism of the dry-sweating process is proposed.