Diesel fuel or diesel fuel base stock and production method thereof
AssigneesJapan Oil, Gas and Metals National Corporation, Inpex Corporation, Jx Nippon Oil & Energy Corporation, Japan Petroleum Exploration Co., Ltd., Cosmo Oil Co., Ltd., Nippon Steel & Sumikin Engineering Co., Ltd.
InventorsTakuya Niitsuma, Marie Iwama
Life of this patent
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Abstract
Provided is a hydrotreating step (A) containing a hydroisomerization step (A1) that obtains a hydroisomerized oil (a1) by bringing a FT synthesis oil into contact with a hydroisomerization catalyst and/or a hydrocracking step (A2) that obtains a hydrocracked oil (a2) by bringing it into contact with a hydrocracking catalyst, and a fractionation step (B) that transfers at least a portion of the hydrotreated oil (a) composed of the hydroisomerized oil (a1) and/or the hydrocracked oil (a2) to a fractionator and, at the very least, obtains a middle distillate (b1) with a 5% distillation point of 130 to 170° C. and a 95% distillation point of 240 to 300° C., and a heavy oil (b2) that is heavier than the middle distillate (b1).
Claims10
A method for producing a diesel fuel or a diesel fuel base stock, comprising:
- a hydrotreating step (A) comprising
- (i) a hydroisomerization step (A1) of contacting a hydroisomerization feedstock comprising a Fischer-Tropsch (FT) synthesis oil, which contains a middle distillate and/or a wax fraction that is heavier than the middle distillate, with a hydroisomerization catalyst at a temperature of 320 to 350° C. to produce a hydroisomerized oil (a1), and
- (ii) a hydrocracking step (A2) of contacting a hydrocracking feedstock comprising the wax fraction with a hydrocracking catalyst at a temperature of 300 to 320° C. to produce a hydrocracked oil (a2);
- and
- a fractionation step (B) comprising
- (i) transferring at least a portion of a hydrotreated oil (a) comprising the hydroisomerized oil (a1) and the hydrocracked oil (a2) to a fractionator and,
- (ii) obtaining a middle distillate (b1) with a 5% distillation point of 130 to 170° C. and a 95% distillation point of 240 to 300° C. and a heavy oil (b2),
- wherein with respect to the hydroisomerized oil (a1), a proportion of branched paraffins with 18 carbon atoms accounts for 85 to 98 mass % of the hydrocarbons with 18 carbon atoms,
- wherein the middle distillate (b1) has a flash point of 30 to 40° C. a pour point of −45° C. or lower, a kinematic viscosity at 30° C. of 1.3 mm2/s or more, and a proportion of branched paraffins of 60 mass % or more with respect to the total amount of paraffins, and
- wherein the middle distillate (b1) is used as a diesel fuel or a diesel fuel base stock.
Dependencies are inferred from the claim text.