The effect of an alternating electromagnetic field in a vortex-layer mill on the structure and properties of a high-wax residuum of gas condensate from the Astrakhan field was studied. The action of the electromagnetic field on the residuum at 280-300degreesC resulted in phase redistribution in the disperse system, and the new product was characterized by an increased resin-asphaltene content. Spectroscopic studies showed that the mechanocrackinc, of the residual components of the Astrakhan condensate could occur in the vortex-layer machine.