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    • 33. 发明专利
    • PRETREATMENT OF HEAVY OIL
    • JPH09296183A
    • 1997-11-18
    • JP10937196
    • 1996-04-30
    • JGC CORP
    • SATO KAZUOYAMADA MASATOSHIKATAGIRI TSUTOMUNOZAKI SHINJI
    • C10G31/00C10G31/06C10G31/09
    • PROBLEM TO BE SOLVED: To reduce the backwashing frequency of a filter and pretreat a heavy oil so as to reduce the exchange of a changeover device of oil passage/ backwashing by carrying out the dehydrating treatment of the heavy oil before introducing the heavy oil containing solid grains and moisture into the filter and increasing the oil passage time through the filter. SOLUTION: The dehydrating treatment of a heavy oil is previously carried out by heating, vacuum and contact operations with an inert gas or combined operations thereof, etc., when introducing the heavy oil containing solid grains and moisture (e.g. an atmospheric distillation bottom oil prepared by introducing a raw material oil containing the solid grains into a distillation column and distilling the raw material oil under atmospheric pressure while blowing steam thereinto and a vacuum distillation bottom oil obtained by introducing the atmospheric distillation bottom oil into a distillation column and distilling the atmospheric distillation bottom oil under a reduced pressure while blowing steam thereinto) into a filter. Furthermore, the dehydrating treatment is preferably performed so as to provide