Process for thermal cracking of heavy oil

摘要

An improvement to a process for thermal cracking a heavy hydrocarbon oil comprising (1) a thermal cracking step of the heavy oil which is in contact with a fluidized bed of heated fine particles as a source of the heat required for the thermal cracking and (2) a regeneration step of the fine particles which are withdrawn from the thermal cracking step and on which coke formed during the thermal cracking has deposited, the steps (1) and (2) being practiced while the fine particles are circulated therebetween, is disclosed. The improvement comprises a use as the fine particles of microspheres of a porous material, division of the regeneration step into a gasification section and a combustion section, and restriction in the operation conditions, and an optional temperature control by controlling generation of steam in a cooling means which is installed in the combustion section and whose coolant is water to generate the steam.