FIELD: petroleum processing.
SUBSTANCE: invention, in particular, relates to a method for processing secondary-origin distillates mixed with straight-run fraction in presence of hydrogen and catalysts in two steps with intermediate heating of gas product mixture provided that first-step process is conducted at hydrogen/feedstock ratio 100-120 nm3/m3 for mixture with iodine number up to 40 g I2/100 g product, 100-170 nm3/m3 for mixture with iodine number to 40-60 g I2/100 g product, and 170-230 nm3/m3 for mixture with iodine number up to 60 g I2/100 g product, while second-step process is conducted at hydrogen/feedstock ratio 150-300 nm3/m3. Mixture comprises secondary distillates at their ratio to straight-run fraction (5-95):(95-5). First-step catalyst is preferably alumino-nickel-molybdenum(tungsten).
EFFECT: enhanced process efficiency.
4 cl, 5 tbl, 12 ex
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Authors
Dates
2008-02-10—Published
2006-11-02—Filed