超重力技术低温反应制备烷基化油工艺研究

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

关键词:  丁烯  异丁烷  超重力  低温烷基化

Key words:  butene  isobutane  high gravity  low temperature alkylation

摘要:

目的 对超重力技术制备烷基化油进行小型实验室制备工艺条件优化研究。方法 采用新型超重力反应器和特定的低温控制工艺,烷烯物质的量之比为10∶1、酸烃体积比为1.4∶1、反应系统压力为0.6 MPa、异丁烷冷机和正丁烯冷机温度为-3～4 ℃、超重力机夹套冷机温度为-6～0 ℃、浓H₂SO₄冷机温度为0～5 ℃、超重力机转速为900～1 100 r/min、连续烷基化反应时间为9 min。结果 在上述工艺条件下,丁烯转化率≥97.0%,液相产物中C₈组分质量分数≥87.98%。C₅、C₆、C₇和C₉⁺组分质量分数分别低于0.84%、1.59%、1.60%和8.01%,制得烷基化油色谱法RON值不低于97.0。结论 采用上述工艺条件烷基化效果较好,可以作为进一步放大试验研究的技术参考。 

Abstract:

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.