低温异构化原料深度脱氮吸附剂及工艺的研发与应用

以中国石化塔河分公司（塔河分公司）重整预加氢后分馏塔顶拔头油（轻石脑油）作为原料进行深度脱氮剂和脱氮工艺的研究，考察脱氮温度、脱氮压力、空速对脱氮效果的影响，确定的最佳脱氮工艺条件为:脱氮温度40 ℃、脱氮压力0.5～1.0 MPa、空速5.0～10.0 h-1。该技术在塔河分公司300 kt/a异构化装置上的工业应用结果表明：以重整预加氢后分馏塔塔顶拔头油作为原料进行深度脱氮处理后，氮质量分数小于0.1 μg/g，能够满足后续低温异构化工艺对氮含量的苛刻要求，得到的异构化产品RON较原料增加20个单位。

DEVELOPMENT AND APPLICATION OF DENITROGENATION AGENT FOR DEEPLY NITROGEN REMOVAL FROM LOW TEMPERATURE ISOMERIZATION FEED

A new denitrogenation agent and a relative process were developed to deeply remove basic nitrogen impurities from the light naphtha (topped oil) of distillation column of reforming feed prehydrogenation unit. Through the lab test in a fixed-bed down-flow reactor, the optimal conditions of denitrogenation process were determined as follows: 40 ℃of adsorption temperature, 0.5-1.0 MPa, space velocity=5.0-10.0 h-1. The technology has been successfully applied in an isomerization unit with 0.3 Mt/a of Sinopec Tahe Petrochemical Co. The results show that the nitrogen content of the light naphtha is lower than 0.1 μg/g, meeting the requirement of the subsequent low temperature isomerization process. The octane number of the isomerization product is 20 percentage points higher than that of feed.