Penex-DIH低温异构化原料精制及装置运行

异构化汽油不含烯烃和芳烃，是非常理想的汽油调合组分。UOP公司的Penex-DIH（异构化反应-脱异己烷塔）工艺可以将辛烷值较低的正构烷烃转化为辛烷值较高的异构烷烃，生产研究法辛烷值（RON）不低于85的清洁汽油调合组分。Penex-DIH异构化装置的核心是Ⅰ-82低温型催化剂，为避免Ⅰ-82催化剂在运转过程中受水、氮、氧等杂质的影响而永久失活，增设了异构化原料的精制单元，原料精制处理后杂质指标可以满足Penex-DIH异构化反应器进料指标要求，保证了Ⅰ-82催化剂的异构化性能稳定和装置的长期运行。

PURIFICATION OF RAW MATERIALS FOR Penex-DIH LOW TEMPERATURE ISOMERIZATION UNIT AND OPERATION

Isomerate does not contain olefin and aromatics,so it is an ideal blending component of gasoline.UOP Penex-DIH(the isomerization reaction+de-isohexane tower)process can be used to convert normal paraffin with lower octane number into isoparaffin with higher octane number to produce clean gasoline blending component with RON 85 or higher.The core of Penex-DIH isomerization unit is theⅠ-82 low-temperature catalyst.In order to avoid the permanent deactivation ofⅠ-82 catalyst due to the influence of water,nitrogen,oxygen and other impurities in the feed,a purification unit for raw material of isomerization unit was added.The purification results showed that the impurity index can meet the requirements of the Penex-DIH isomerization reactor,ensuring the stability of the isomerization performance of the I-82 catalyst and the long-term operation.