Pitch Production from Mixtures of Coal Tar and Rubber Crumbs

Resumo

To expand the range of materials from which coal pitch may be produced, the interaction of coal tar with rubber crumbs from discarded tires is investigated. Ultrasound treatment of a tar–crumb mixture and subsequent oxidation in air at 240–360°C may be used to produce an analog of coal pitch (binder) and a light fraction. The binder characteristics may be regulated in terms of the softening temperature, which is determined by the duration of oxidation.