关键词: 烷基化装置, 复合离子液体, 催化剂失活, 反应温升, 烯烃含量, 氯含量, 干点

Abstract: SINOPEC first adopted the new composite ionic liquid alkylation technology developed by China University of Petroleum (Beijing) in the 0.3 MM TPY alkylation unit of SINOPEC Jiujiang Company. During the trial operation of the unit, the composite ionic liquid catalyst was deactivated for many times for various reasons, resulting in the continuous operation of the unit for less than one month. Through continuous exploration, the changes of key indexes such as system reaction temperature rise, olefin content in circulating isobutane, dry point and chlorine content of alkane oil products before and after catalyst deactivation were studied and analyzed. The countermeasures for the factors leading to catalyst deactivation such as feedstock impurity category and content control, appropriate reaction paraffin olefin ratio, acid hydrocarbon ratio, tert-butyl chlorine and active agent addition were put forward, so as to greatly reduce the deactivation of ionic liquid catalyst. The unit basically realized low load and stable operation in the second half of the year, providing valuable production experience for the development of composite ionic liquid alkylation process technology.

Key words: alkylation unit, composite ionic liquid, catalyst deactivation, reaction temperature rise, olefin content, chlorine content, dry point