Abstract: Alkylation technology is an important oil processing technology for producing clean fuels, which usually adopts sulfuric acid alkylation of CDAlky^R static mixing reactor technology. However, there are still some problems in the process of sulphuric acid alkylation, for example,the increase of the pressure difference of the packed bed in the reactor leads to the decrease of the operating load of the unit, which seriously affects the production capacity of the unit. In view of this probleum, the factors which might affect the increase of the pressure difference of the packing layer were investigated from four aspects:the initial pressure difference of the packing layer, the impurity content in raw materials, theprecision of thecirculating acid filter and the impurity content in the machine-sealed white oil.The treatment measures were put forward accordingly, which could effectively solve the problem of the increasing pressure difference of CDAlky^R alkylated packing layer, and provide technical reference for other unites.

Key words: CDAlky^R alkylation, packing layer pressure difference, circulating acid filter, machine seal white oil