Patent ID: 9725658
Date: 2017-08-08
CPC Classifications: C10G

Claim:
1. A method for processing low-grade heavy oil with carbon residue content of greater than 15 wt %, heavy metal content of greater than 260 μg/g and relative density of more than 0.985, comprising: providing a riser-bed reactor including a riser reactor and a fluidized bed reactor connected in series with the riser reactor; preheating the low-grade heavy oil and injecting the preheated low-grade heavy oil into the riser reactor to contact and react with solid catalyst particles in the riser reactor, wherein reaction temperature in the riser reactor is controlled to be in the range of 550-610° C.; introducing oil-gas that is formed after reaction with the solid catalyst particles in the riser reactor, from the riser reactor into the fluidized bed reactor to continue to react in the fluidized bed reactor, wherein reaction temperature in a bed layer of the fluidized bed reactor is 440-520° C. and weight hourly space velocity is 0.5-5 h separating oil-gas that is formed after reaction in the fluidized bed reactor, from coked solid catalyst particles carried therein, and introducing the separated oil-gas into a fractionation system; wherein the solid catalyst particles have a specific surface area of greater than 80 m