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This method is used to extract high-quality lube oils from vacuum distillates and deasphalted oil (DAO) from the SDA process. These side products were mainly used as softener and tender oil by the tire industry. They are now as highly toxic strictly prohibited.

To meet the required limits, the high toxic PCA amounts of the extracts can be separated by employing a further extraction stage. It is then possible to obtain Raffinate Treated Distilled Extracts (TDAE) and Treated Residue Extracts (TRAE) from the DAE and RAE extracts.

Benefit for the customer

This double extraction technology makes it possible to produce environmentally friendly tender oils which have more benefits to offer as to the tire quality. Solvent extractions can be converted to the use of the solvent NMP thus replacing the ecological harmful solvents (phenol and furfural). In addition, it is possible to increase the production capacity by using advanced extractor internals and specific engineering solutions.