C5/C6异构化技术在济南分公司的工业应用

Industrial application of C/C isomerization technology in SINOPEC Jinan Company

介绍了中国石油化工股份有限公司石油化工科学研究院开发的C5/C6异构化技术在中国石油化工股份有限公司济南分公司160 kt/a异构化装置的生产应用情况,该装置由300 kt/a催化重整装置预加氢部分改造而成,使用RISO-B中温型沸石异构化催化剂,采用一次通过流程。装置标定结果表明:RISO-B催化剂的活性高,稳定性好,异构化稳定汽油中C5及C6组分的异构化率分别达到62.9%及82.5%,RON达到81.8,达到设计指标。对生产中出现的问题进行了分析总结:①反应初期需尽量降低进料温度,并严格控制升温速度,防止反应器床层飞温;②原料中过多的C4及C7组分会影响稳定塔的分离效果,降低稳定汽油中C5组分的异构化率;③在满足氢油比的条件下适当降低循环氢量,同时优化氢气缓冲罐的切液流程,可减少循环氢带液造成的物料损失。

Application of C5/C6 isomerization technology developed by SINOPEC Research Institute of Petroleum Processing in the 160 kt/a isomerization unit of Jinan Petrochemical Company is introduced.The unit is revamped from the pre-hydrogenation part of a 300 kt/a catalytic reforming unit,using RISO-B medium temperature zeolite isomerization catalyst and adopting a once-through process.The calibration results show that RISO-B has high activity and good stability.The isomerization rates of C5 and C6 components in the stable gasoline are 62.9%and 82.5%,and RON is 81.8,which meets the design target.The problems in production are discussed and analyzed.Lower feed temperature should be controlled in the initial stage of reaction,and the heating rate should be strictly controlled to prevent the bed temperature runaway.Excessive C4 and C7 in feedstock will affect the separation effect of stabilizer and reduce the isomerization rate of C5 in stable gasoline.Under the condition of satisfying the hydrogen oil ratio,the material loss caused by condensate discharge can be reduced by properly reducing the amount of circulating hydrogen and optimizing the condensate discharge process of hydrogen buffer tank.