Process and apparatus for fluidized-bed hydrocarbon conversion

Details Process and apparatus for fluidized-bed hydrocarbon conversion Process and apparatus for fluidized-bed hydrocarbon conversion

1993-05-06

1996-04-09

Pal, Asok

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce unsaturate

208 67, 208 72, 208 73, 208113, 585324, 585330, 585648, 585653, C07C 406, C10G 1118

Patent

active

055063659

ABSTRACT:
The invention relates to a process for the conversion of petroleum hydrocarbons in the presence of catalyst particles in a fluidized phase in an essentially upflow or downflow tubular reaction zone. The process includes at least one stage of steam cracking of at least one light hydrocarbon fraction and a stage of catalytic cracking of at least one heavy hydrocarbon fraction. The steam cracking is carried out by contacting the light hydrocarbons and a quantity of steam equal to at least 20 percent by weight in a fluidized bed of the catalyst particles, the resulting temperature ranging from 650.degree. to 850.degree. C. The catalytic cracking of the heavy hydrocarbons is carried out by injection of the effluents from the upstream section of the reaction zone into the catalyst suspension in such a way that the temperature of the mixture ranges from 500.degree. to 650.degree. C. and is then reduced to a temperature ranging 475.degree. to 550.degree. C.

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