轻质烷烃异构化工艺技术

Light paraffin isomerization process

介绍了目前工业上广泛应用的低温和中温二种轻质烷烃异构化技术的工艺流程、异构化油可以达到的辛烷值水平、主要操作条件和对生产环境的要求等。低温异构化技术可提供辛烷值(RON)水平更高的异构化油,一次通过流程的RON可以达到83左右,而对应的中温异构化技术仅能够达到78左右,但低温技术对反应环境的要求更为苛刻。对进一步提高异构化油辛烷值水平的几种循环流程方案进行了介绍和对比,其中采用异己烷和正己烷循环并配以低温异构化技术的流程较为经济且近年来在国内采用较多,其RON可以达到88左右。用户可以根据项目的实际需求选择适宜的异构化技术和循环流程。

Here introduced are the process flows of low-temperature medium-temperature light paraffin isomerization processes widely applied in the industry,the octane number of isomerate,the main operating conditions and the production requirements,etc.The low-temperature isomerization process can provide highoctane isomerate.The once-through process can produce isomerate with RON 83.Whereas,the octane number of medium-temperature isomerization process is only about 78.The low-temperature process requires more severe reaction environment.The paper also provides an introduction and comparison of several isomerization processes which recycle part of low-octane products to reactor for high-octane isomerate production.Low-temperature isomerization process with isohexane and normal hexane recycles,whose RON can reach about 88,is more economical and commonly applied in China.The clients can select appropriate isomerization process and recycle process flow according to their actual requirements.