Abstract: The 200 kt/a alkylation unit at SINOPEC Luoyang company did not produce enough alkylate in summer to fully blend the gasoline produced by the refinery. By analyzing the principle of alkylation reaction and the composition of reaction raw materials, it was found that the low content of olefins in the reaction was the main reason for the low yield. Through research and analysis, under the condition of sufficient content of isobutane, the alkylate yield could be improved by blending C5 fraction with more olefin. Through the feasibility analysis of the blending scheme, the blending scheme was feasible, the mass ratio of C5 fraction was 8% to the alkylation unit. By optimizing and adjusting the reaction parameters, the high quality alkylate products with research octane number of 95.3, vapor pressure of 44.1 kPa, end-fraction-point of 195 ℃ and density(20 ℃) of and 694.2 kg/m³ were obtained. At the same time, the volume fraction of the reaction feedstock olefin increased by 1.89 percentage points, the yield of alkylate increased by 3.78 percentage points, and the acid consumption reduced by 0.48 kg/t, which achieved the goal of producing more alkylate and reducing energy consumption of the unit, and to make the company produced by the fully blended of gasoline, gasoline quality to meet the requirements of the factory.

Key words: alkylation catalyzed by sulfuric acid, alkylate, C₅ fraction, blending processing