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AssigneeLurgi Lent Jes AG
InventorsHans-Jurgen Weiss, Udo Zentner, Helmut Heurich
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The invention relates to a method for a high temperature short-time distillation of residual oil. The method according to the invention is characterized by a technically simple recovery of a small residual fraction from a gas and/or oil vapour mixture produced by a mixing apparatus (1). Said small residual fraction contains large quantities of undesirable polluting catalytic substances (CCR, Ni, V, asphaltenes). For this purpose, the gas and/or oil vapour mixture produced by the mixing apparatus (1) is diluted with gas or water vapour in a column (17) at a temperature of 450° C. in such a way that a high boiling fraction, which has a high content of the pollutant substances and whose initial boiling point is higher than 450° C., is condensed and extracted. Another realization of the method consists in introducing a non condensed oil produced in the column (17) into a fractionating column (19), where said oil is decomposed in order to produce a depressurized gas oil fraction having a low content of pollutants and a benzine/gas oil fraction.
A method for high temperature short-time distillation of a residual oil originating from the processing of crude petroleum, natural bitumen or oil sand, wherein in a mixing apparatus (1) the residual oil is mixed with granular hot coke as heat transfer medium, converted into oil vapour, gas and coke, and gases and vapours are evacuated from the mixing apparatus (1) while being substantially separated from the granular coke, gases and vapours are cooled down and a product oil in form of condensate as well as gas is produced and wherein the coke, which has been evacuated from the mixing apparatus (1), is again heated and returned into the mixing apparatus (1) as heat transfer medium, characterized in that the vaporized product oil is partially condensed in a column (17) at temperatures beneath 450° C. while adding gas or water vapour for reducing the partial pressure, a high-boiling fraction is extracted from this column (17) and the non condensed gases and oil vapours are evacuated.
Dependencies are inferred from the claim text.