Abstract: The alkylate oil produced by low temperature sulfuric acid alkylation unit has the characteristics of high octane number, low sulfur and no olefin. The important factors affecting the octane number of alkylate were analyzed by comparing the composition of olefin, the concentration of isobutane, the concentration of acid, the amount of acid circulation and octane number of alkylate oil in daily raw materials, and corresponding control methods and optimization measures were put forward to improve the octane number of alkylate and to achieve the optimization purpose.

Key words: CDAlky, alkylate, octane number, optimization