Japan Energy Corporation

Manabu Kobayashi

Katsuaki Ishida

Hiroki Koyama

Toru Saito

Masayuki Saito

Kaori Matsuzawa

Futoshi Sakaguchi

Hiroshi Yachi

Seiji Togawa

This invention relates to lubricant base oil having high viscosity indexes and low pour points, and particularly to lubricant base oil consisting essentially of a normal paraffin and an isoparaffin, wherein (a) an average carbon number Nc in one molecule is not less than 28 but not more than 40, and (b) an average branch number Nb in one molecule calculated from a ratio of CHcarbon to total carbon determined byC-NMR analysis and the average carbon number Nc in one molecule is not more than (0.2Nc&#x2212;3.1) but not less than 1.5.

Lubricant base oil and method of producing the same

The two-stage hydrocracking process of the present invention comprises bringing the first-stage feed oil containing a hydrocarbon component and having a boiling point of 316&deg; C. or higher into contact with the first-stage catalyst in the presence of hydrogen to obtain a first-stage product; separating the first-stage product into heavy component and light component containing the middle distillate products; bringing the second-stage feed oil containing heavy component of the first-stage reaction product into contact with the second-stage catalyst in the presence of hydrogen to obtain the second-stage product; separating the second-stage product into heavy component and light component comprising middle distillate products and recycling part of the heavy component of the second-stage product to the second-stage feed oil. Hydrocracking activity of the first-stage catalyst is higher than hydrocracking activity of the second-stage catalyst.

Method of producing middle distillate products by two-stage hydrocracking and hydrocracking apparatus

A hydrocracking catalyst has a carrier that has particles of a compound oxide and a binder present between these particles, and at least one metal component selected from Group 6, Group 9 or Group 10 of the Periodic Table supported on the carrier. The catalyst has a median pore diameter of 40 to 100 &angst; and the volume of pores whose pore diameter falls within a range of 40 to 100 &angst; is at least 0.1 mL/g. Moreover, the volume of pores of the catalyst whose pore diameter falls within a range of 0.05 to 5 &mgr;m is 0.05 to 0.5 mL/g, and the volume of pores whose pore diameter is 0.5 to 10 &mgr;m is less than 0.05 mL/g. This catalyst is mechanically strong enough for practical use and has a high conversion rate and middle distillate selectivity in hydrocracking of hydrocarbon oils, particularly vacuum gas oil.

Hydrocracking catalyst, producing method thereof, and hydrocracking method

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Toda, Japan

Manabu Kobayashi