Method for producing hydrocarbon oil and system for producing hydrocarbon oil

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(57) Abstract : To provide a method for producing a hydrocarbon oil capable of accurately and quantitatively monitoring inflow of fine powder of a Fischer-Tropsch (FT) synthesis reaction catalyst into an upgrading reaction system and of predicting problems in the reaction system. This method for producing a hydrocarbon oil fractionates a hydrocarbon oil obtained by a FT synthesis re- action using a catalyst in a slurry bed reactor (C2) into a distillate oil and a bottom oil in a rectifying column (C4), circulates a part of the bottom oil through a first transfer line (L12) which connects the bottom of the rectifying column (C4) and a hydrocracker (C6), circulates at least a part of the bottom oil through a second transfer line (L14) which branches from the first transfer line (L12) and connects to the first transfer line (L12) at a downstream branch point, collects catalyst fine powder in the bottom oil that flows through the second transfer line (L14) with a removable filter (2) installed in the second transfer line (L14) and monitors the collected amount, and hydrocracks the bottom oil in the hydrocracker (C6). II Ill GM, GT, BY, KG, MD, RU, KG, KM, KN, (AL, AT, BE, ES, FI, FR, LT, LU, MA, MD, ME, MG, MN, MW, GB, GR, IS, IT, LT, LU, NI, NO, NZ, OM, PE, PG, PH, SE, SI, RU, SC, SM, ST, CM, GA, ML, MR, NE, SN, LS, MW