Study on preparation of alkylated oil by low temperature reaction with high gravity technology

Objective To optimize the preparation process of alkylated oil by high gravity technology in small laboratory.

Methods A new type of high gravity reactor and specific low temperature control process were used. The molar ratio of n-butene to isobutane was 10∶1, the volume ratio of H₂SO₄ to hyarocarbon was 1.4∶1, the reaction system pressure was 0.6 MPa, the temperature of isobutane cooler and n-butene cooling machine was from -3 ℃ to 4 ℃, the temperature of high gravity machine jacket cooling machine was from -6 ℃ to 0 ℃, the temperature of concentrated H₂SO₄ cooling machine was 0-5 ℃, and the rotate speed of high gravity machine was 900~1 100 r /min, continuous alkylation reaction was 9 min.

Results Under the above conditions, the conversion rate of butene was more than 97.0%, and the mass fraction of C₈ in liquid product was more than 87.98%. The mass fractions of C₅, C₆, C₇ and C₉⁺ were lower than 0.84%, 1.59%, 1.60% and 8.01%, respectively, and the RON value of alkylated oil chromatography was not less than 97.0.

Conclusion The alkylation effect is good under the above conditions, which can be used as a technical reference for the study of further scale-up experiments.