Abstract: A method for producing a hydroisomerization catalyst according to the present invention includes: a first step of preparing a catalyst to be treated, which contains a support having a one-dimensional porous structure including a 10-membered ring and at least one metal selected from the group consisting of: group 8 to 10 metals of the periodic table, Mo, and W supported on the hydroisomerization catalyst; and a second step of producing a hydroisomerization catalyst having a carbon content of 0.4 to 2.5% by mass by subjecting the catalyst to be treated to a coking treatment by means of a carbon-containing compound.

Abstract: A method for producing a lubricant base oil which comprises a first step of carrying out isomerization dewaxing by contacting, in the presence of hydrogen, a hydrocarbon oil containing normal paraffin having a boiling point of 360° C. or higher, with a hydroisomerization catalyst under conditions such that a cracking rate defined in the following formula (1) is 10 mass % or less, and a second step of carrying out the above isomerization dewaxing by temporarily switching the above conditions to conditions such that the cracking rate is 13 mass % or more. Cracking rate (mass %)=[(C1?C2)/C1]×100??(1) wherein C1 represents the mass ratio of a fraction having a boiling point of 360° C. or higher in the above hydrocarbon oil, and C2 represents the mass ratio of the fraction having a boiling point of 360° C. or higher in the above hydrocarbon oil after the isomerization dewaxing.

Abstract: A method for starting up a bubble column slurry bed reactor of the present invention includes, when restarting operation of a bubble column slurry bed reactor for producing hydrocarbons by the Fischer-Tropsch synthesis reaction, feeding a hydroprocessed oil produced in the bubble column slurry bed reactor and hydroprocessed that contains 40% by mass or more of paraffin hydrocarbons having carbon number of 21 or more and that has a peroxide value of 1 ppm or less, to the bubble column slurry bed reactor.

Abstract: A method for starting up a bubble column slurry bed reactor of the present invention includes, when restarting operation of a bubble column slurry bed reactor for producing hydrocarbons by the Fischer-Tropsch synthesis reaction, feeding a hydroprocessed oil produced in the bubble column slurry bed reactor and hydroprocessed that contains 40% by mass or more of paraffin hydrocarbons having carbon number of 21 or more and that has a peroxide value of 1 ppm or less, to the bubble column slurry bed reactor.

Abstract: A Fischer-Tropsch synthesis reaction catalyst includes a catalyst support containing a silica and zirconium oxide in an amount of 0.5 to 14% by mass based on the mass of the catalyst support, and cobalt metal and a cobalt oxide supported on the catalyst support in an amount equivalent to 10 to 40% by mass of tricobalt tetroxide based on the mass of the catalyst, wherein the degree of reduction of the cobalt atoms is within a range from 75 to 93%, and the amount of hydrogen gas adsorption per unit mass of the catalyst at 100° C. is within a range from 0.40 to 1.0 ml/g.

Abstract: A method for producing a regenerated Fischer-Tropsch synthesis catalyst obtained by regenerating a spent catalyst used in a Fischer-Tropsch synthesis reaction, comprising a steaming step of bringing the above spent catalyst into contact with a mixed gas comprising 1 to 30% by volume of steam and an inert gas at a pressure of atmospheric pressure to 5 MPa and a temperature of 150 to 350° C., the above spent catalyst being a spent catalyst in which cobalt and/or ruthenium is supported on a carrier comprising silica with an average pore diameter measured by a nitrogen adsorption method of 4 to 25 nm, and of which activity represented by an initial carbon monoxide conversion is 40 to 95%, based on the activity of a corresponding unused catalyst.

Abstract: A method for producing an activated Fischer-Tropsch synthesis catalyst comprising a hydrogen reduction step of subjecting a catalyst comprising 3 parts by mass to 50 parts by mass, as a metal atom, of a cobalt compound and/or a ruthenium compound, based on 100 parts by mass of a carrier containing a porous inorganic oxide, supported on the carrier, to reduction in a gas containing molecular hydrogen at a temperature of 300° C. to 600° C.; and a CO reduction step of subjecting the catalyst to reduction in a gas containing carbon monoxide and containing no molecular hydrogen at a temperature of 200° C. to 400° C.

Abstract: A method for producing an activated Fischer-Tropsch synthesis catalyst comprising a hydrogen reduction step of subjecting a catalyst comprising 3 parts by mass to 50 parts by mass, as a metal atom, of a cobalt compound and/or a ruthenium compound, based on 100 parts by mass of a carrier containing a porous inorganic oxide, supported on the carrier, to reduction in a gas containing molecular hydrogen at a temperature of 300° C. to 600° C.; and a CO reduction step of subjecting the catalyst to reduction in a gas containing carbon monoxide and containing no molecular hydrogen at a temperature of 200° C. to 400° C.

Abstract: The hydroisomerization catalyst of the present invention is a catalyst used for hydroisomerization of a hydrocarbon, including a support including a calcined zeolite modified with at least one metal selected from the group consisting of Na, K, Cs, Mg, Ca, Ba, and K, and having a thermal history that includes heating at 350° C. or more, and at least one inorganic oxide selected from the group consisting of alumina, silica, titania, boria, zirconia, magnesia, ceria, zinc oxide, phosphorus oxide, and a composite oxide containing a combination of at least two or more of these oxides; and at least one metal supported on the support and selected from the group consisting of elements belonging to Groups 8 to 10 of the periodic table, molybdenum and tungsten.

Abstract: A Fischer-Tropsch synthesis catalyst containing 10 to 30% by mass, as a metal atom, of metallic cobalt and/or cobalt oxide, based on the mass of the catalyst, supported on a carrier containing silica, in which the carrier has an average pore diameter of 8 to 25 nm and the metallic cobalt and/or cobalt oxide has an average crystallite diameter of not less than the average pore diameter of the carrier and less than 35 nm.

Abstract: A method for producing a regenerated Fischer-Tropsch synthesis catalyst obtained by regenerating a spent catalyst used in a Fischer-Tropsch synthesis reaction, comprising a steaming step of bringing the above spent catalyst into contact with a mixed gas comprising 1 to 30% by volume of steam and an inert gas at a pressure of atmospheric pressure to 5 MPa and a temperature of 150 to 350° C., the above spent catalyst being a spent catalyst in which cobalt and/or ruthenium is supported on a carrier comprising silica with an average pore diameter measured by a nitrogen adsorption method of 4 to 25 nm, and of which activity represented by an initial carbon monoxide conversion is 40 to 95%, based on the activity of a corresponding unused catalyst.

Abstract: A method for producing a lubricant base oil includes contacting feedstock containing normal paraffins having not less than 20 carbon atoms with a first catalyst in the presence of molecular hydrogen to obtain a first produced oil, and contacting the first produced oil with a second catalyst in the presence of molecular hydrogen to obtain a second produced oil. The first catalyst includes a first carrier in which a fraction of an amount of NH3 to be desorbed at 300 to 800° C. based on a total amount of NH3 to be desorbed is 80 to 90% in temperature-programmed desorption of NH3, a first metal selected from metals of Group VI in the periodic table carried on the first carrier, and a second metal selected from metals of Group VIII to Group X in the periodic table carried on the first carrier.

Abstract: A desulfurizing agent for a hydrocarbon comprises: 10 to 30 percent by mass of a porous inorganic oxide based on the total mass of the desulfurizing agent; 3 to 40 percent by mass of zinc oxide; and 45 to 75 percent by mass of a nickel atom in terms of nickel oxide, wherein the reduction degree of the nickel atom is 50 to 80 percent, and wherein the amount of hydrogen adsorption per unit desulfurizing agent mass is 3.5 to 4.6 ml/g.

Abstract: A system is provided for desulfurizing a hydrocarbon fuel containing a light amount of methanol and a slight amount of water. The desulfurization system uses a Y-type zeolite-based desulfurizing agent containing at least copper arranged upstream of the system and an X-type zeolite-based desulfurizing agent containing at least silver arranged downstream of the system and thus can maintain desulfurization effect for a long period of time.

Abstract: A system is provided for desulfurizing a hydrocarbon fuel containing a light amount of methanol and a slight amount of water. The desulfurization system uses a Y-type zeolite-based desulfurizing agent containing at least copper arranged upstream of the system and an X-type zeolite-based desulfurizing agent containing at least silver arranged downstream of the system and thus can maintain desulfurization effect for a long period of time.