As the sulfur content of crude oil quality and oil becoming heavier, catalytic cracking technology is ever increasing, and there are a large number of processing high carbon residue, high metal content of the raw materials of plant into operation. 随着原油质量趋向于含硫化和重质化,催化裂化的技术也在不断提高,且已有一大批处理高残炭、高金属含量的原料的装置建成投产。