Abstract This invention relates to a process for cheaply treating a muddy-like waste oil material of an industrial waste material especially containing sulfur compounds at a temperature of less than the decomposition temperature of sulfur compounds without generating any secondary pollution. The process of this invention possesses the characteristic features comprising a step of adding to the muddy-like waste oil material, a paraffin base saturated hydrocarbon having a boiling point of 30*-250*C to make it easy to separate an asphalt base sludge and a low-sulfur containing fuel oil from the said waste oily material and a step of drydistillating the said asphalt base sludge using the particular dry-distillating still to produce a coke-like sludge.
The process as claimed in claim 1 wherein the dry distillation is effected by blowing a preheated inactive gas or a super heated steam into the still which is direct fired or jacket-heated from the outside thereof while slowly agitating the sludge.
Claim 2
Dependent Claim
66 words
The process as claimed in claim 1 wherein the asphalt base sludge has the oil fraction contained therein primarily stripped therefrom by super heated steam prior to the dry distillating thereof, the dry distillation being effected by blowing a preheated inactive gas or a super heated steam into the still, and collecting the inactive vapor flowing from the top of the still and condensing such vapor.
Claim 3
Dependent Claim
24 words
The process as claimed in claim 1 wherein the muddy-like oily material is cooled to room temperature between the said second and third steps.
Claim 4
Dependent Claim
34 words
The process as claimed in claim 1 and including the step of filtering said fuel oil fraction obtained in said fourth step to separate any asphalt base sludge therein prior to said fifth step.