Catalytic cracking slurry oil solid content removal method

Abstract

The invention discloses a catalytic cracking slurry oil solid content removal method.The method comprises the following steps that 1, heat pretreatment is conducted on catalytic cracking slurry oil; 2, vacuum distillation is conducted on the catalytic cracking slurry oil subjected to heat pretreatment, and solid removal slurry oil distillate oil is obtained.According to the catalytic cracking slurry oil solid content removal method, heat pretreatment is conducted on the slurry oil before distillation is conducted so as to enable micron or submicron solid particles in the slurry oil to aggregate and grow up, and the solid particles can stay in distillation residues more easily, so that the solid content in the slurry oil distillate oil is reduced, and the solid content of the slurry oil distillate oil is further reduced on the basis of simple distillation operation.The catalytic cracking slurry oil solid content removal method is easy to operate and high in removal efficiency, adaptability to raw materials is high, influence factors are few, the cost is low, and industrialization is easy.

Description

technical field [0001] The invention relates to a method for solid-liquid separation, in particular to a method for removing solids in catalytic cracking oil slurry. Background technique [0002] Catalytic cracking oil slurry is an external by-product of the catalytic cracking process. Because it contains a relatively high content of short-chain polycyclic aromatic hydrocarbons, it has become a high-quality raw material for the production of high value-added chemical products such as needle coke and carbon fiber. However, the oil slurry generally contains more than 2g / L solid particles (mainly catalyst and coke powder), which seriously limit the efficient utilization of the oil slurry; in addition, when it is used as heavy fuel oil, the oil in the oil slurry Solid content is easy to cause burner coking and wear. Therefore, it is necessary to remove the solid particles in the oil slurry. [0003] At present, the methods for removing solids from catalytic cracking oil slurry...

AI Technical Summary

Problems solved by technology

The sedimentation method has simple equipment and low energy consumption, but both the natural sedimentation method and the additive sedimentation method have low efficiency; the filtration method has a stable separation effect and strong adaptability to raw materials, but the filter holes of the filter device are easily blocked and the filtration resistance is large , long washing time; centrifugation method has limited processing capacity, complicated equipment, and inconvenient operation and maintenance; electrostatic method is suitable for separating solid-liquid systems with small particle size and low concentration. There are many separation factors, complex equipment and high cost

Images