Industrial application of PHT-01/PHC-05 combined catalyst in hydrocracking unit
In the 1.10 Mt/a hydrocracking unit of Liaoyang Petrochemical Company of PetroChina,the secondary oil of Russian crude oil(mixed oil of vacuum wax oil and catalytic diesel oil,with the mass ratio of 10∶1)was used as raw material,and PHT-01 hydrorefining catalyst,PHC-05 hydroc-racking catalyst and PHT series hydrotreating pro-tection agent developed by PetroChina indepen-dently were used for industrial application in order to produce heavy naphtha to the maximum extent.The application situation of the catalyst,product properties and distribution were investigated.The results showed that during the operation of the cata-lyst,wet vulcanization and passivation could be carried out at the same time.The average reaction temperatures of the refining reactor and the cracking reactor were 367℃and 363℃,which were 5℃and 15℃lower than the design values respective-ly,and the temperature rise was 3℃and 4℃lower than the design values respectively.The sulfur(ni-trogen)content of the target heavy naphtha was less than 0.5 μg/g,the bromine index was 0.755 mg/g,aromatic potential mass fraction was 47.3%,the initial distillation point was 73℃,and the yield was 51.56%.The nitrogen content of refined oil was 7-9 μg/g,and the yield of main products was 94.04%,which met the feed requirements of down-stream reforming unit.
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