METHOD OF MAKING A SOFTENER FOR RUBBER MIXTURES AND A FURNACE FUEL OIL

摘要

A method of making a softener for rubber mixtures and furnace fuel oil comprises the steps of heating a hydrocarbonaceous solvent and adding thereto waste from vulcanized and nonvulcanized rubbers under intensive stirring. Then the waste is thermally decomposed at a pressure of 5-102 to 25-105 n/m2, the hydrocarbonaceous solvent continuously circulating through the reaction mixture. The end product is separated from the formed suspension by distillation at a temperature of 200 to 560.degree.C and at a pressure of 10 to 2-105 n/m2 in the presence of an inert gaseous agent. The method of the present invention makes it possible to practically eliminate coking of the raw material in the course of the thermal decomposition and to upgrade the quality of the end product, as well as to improve its characteristics and the properties of rubber mixtures of vulcanizates.