The invention discloses a catalytic
conversion method of
petroleum hydrocarbon. High-
sulfur wax oil is contacted with a
heat regeneration catalyst at the lower portion of a catalytic
cracking unit reactor and subjected to a
cracking reaction, wherein the
heat regeneration catalyst has relatively
low activity and
coarse particle size distribution and contains
macropore zeolite and mesopore
zeolite, the generated oil gas and a carbon-containing catalyst go up and are subjected to a selective
hydrogen transfer reaction and an
isomerization reaction under a certain reaction environment, the reaction oil gas is separated to obtain a
reaction product containing liquefied gas,
gasoline and catalytic
wax oil, and the spent catalyst is recycled for use after stripping and regeneration, wherein the catalytic
wax oil and optional other secondary
processing wax oil are introduced into the hydrocracking unit for reaction, and preferably the hydrocracked
tail oil is returned to the catalytic
cracking unit. According to the method, the diesel oil yield and the
cetane number of the diesel oil are increased, the
mass percentages of low carbon olefins such as propylene and butylenes in the liquefied gas are increased, the
hydrogen utilization rate of the raw materials is increased, and simultaneously the
utilization rate of
hydrogen in the raw materials is raised, so that the
petroleum resource can be saved, and the method provides a novel approach for cleaning the refining process and the refined oil products.