STRIPPING OF DILUENT FROM THE D.C. TAILINGS OF A HOT WATER PROCESS

摘要

70607-30 A novel process for recovering naphtha diluent and bitumen from dilution centrifuge tailings comprises passing the tailings into a stripping cell which receives a carrier gas, preferably inert, for stripping the naphtha from the tailings and also For forming an essentially naphtha-free bitumen froth which is skimmed from the cell and preferably added to a primary bitumen froth stream, the stripped naphtha vapours being collected together with the carrier gas and recovered in a substantially pure form. This recovery of expensive naphtha is effected in a single step while concurrently providing a useful bitumen froth and thus the process significantly contributes to the efficiency of the Hot Water extraction process.