Abstract: In the method for producing an optically active 2,3-bisphosphinopyrazine derivative of the present invention, an optically active 2,3-bisphosphinopyrazine derivative represented by the following formula (3) is produced by the step of: preparing solution A containing 2,3-dihalogenopyrazine represented by the following formula (1) and a carboxylic acid amide coordinating solvent, lithiating an optically active R- or S-isomer of a hydrogen-phosphine borane compound represented by the following formula (2) to give a lithiated phosphine borane compound; adding solution B containing the lithiated phosphine borane compound to the solution A to perform an aromatic nucleophilic substitution reaction; and then performing a deboranation reaction. (For symbols in the formulas, see the description.

Abstract: An optical fiber bundle manufacturing apparatus includes: a winding member; a guide member movable in a direction parallel to a rotary axis, the guide member being configured to guide an optical fiber wire to any one of first winding positions, a converging winding position and second winding positions; and a processor configured to perform processing to move the guide member such that a first branching portion branching into p branches, a converging portion converging the first branching portion branching into p branches into one, a second branching portion branching into q branches, and a connecting portion connecting the first branching portion and the second branching portion are formed in this order by the optical fiber wire.

Abstract: The silyl phosphine compound of the present invention is represented by the formula (1) and has an arsenic content of not more than 1 ppm. The process for producing a silyl phosphine compound of the present invention is a process comprising mixing a basic compound, a silylating agent and phosphine to obtain a solution containing a silyl phosphine compound, removing a solvent from the solution to obtain a concentrated solution of a silyl phosphine compound, and distilling the concentrated solution, wherein an arsenic content in the phosphine is adjusted to not more than 1 ppm by volume in terms of arsine. The process for producing InP quantum dots of the present invention uses, as a phosphorus source, a silyl phosphine compound represented by the formula (1) and having an arsenic content of not more than 1 ppm by mass. (For definition of R, see the specification.

Abstract: The silyl phosphine compound of the present invention is represented by the formula (1) and has an arsenic content of not more than 1 ppm. The process for producing a silyl phosphine compound of the present invention is a process comprising mixing a basic compound, a silylating agent and phosphine to obtain a solution containing a silyl phosphine compound, removing a solvent from the solution to obtain a concentrated solution of a silyl phosphine compound, and distilling the concentrated solution, wherein an arsenic content in the phosphine is adjusted to not more than 1 ppm by volume in terms of arsine. The process for producing InP quantum dots of the present invention uses, as a phosphorus source, a silyl phosphine compound represented by the formula (1) and having an arsenic content of not more than 1 ppm by mass. (For definition of R, see the specification.

Abstract: The silyl phosphine compound is represented by the following general formula (1). A content of a compound represented by the following general formula (2) is not more than 0.3 mol %. In the general formula (1), each R is independently an alkyl group having not less than 1 and not more than 5 carbon atoms or an aryl group having not less than 6 and not more than 10 carbon atoms. In the general formula (2), R is the same as in the general formula (1).

Abstract: There is provided a novel optically active bisphosphinomethane useful as a ligand for an asymmetric catalyst, excellent in oxidation resistance in air, and easy in handling. There is also provided a transition metal complex using the optically active bisphosphinoraethane having excellent asymmetric catalytic ability as a ligand. The optically active bisphosphinomethane is represented by the general formula (1), and the transition metal complex has the optically active bisphosphinomethane as a ligand. (In the formula, R1 represents an adamantyl group; R2 represents a branched alkyl group having 3 or more carbon atoms; and * represents an asymmetric center on a phosphorus atom.

Abstract: A production method by which a biarylphosphine useful as a Buchwald phosphine ligand can be obtained in high purity is provided through an industrially advantageous process. The production method of a biarylphosphine comprises a step A of reacting a lithiated product obtained through lithiation of a halogenated benzene derivative with a benzene derivative to obtain a biphenyl derivative, and a step B of the reacting the biphenyl derivative with a halogenated phosphine. In the step A, the charge molar ratio of the halogenated benzene derivative to the benzene derivative is preferably 1.0 to 5.0.

Abstract: In the present invention, a coal gasification combined power generation facility comprises: a feed water supply line (72); a condensate pump (39) and an intermediate-pressure feed water pump (40); a turbine bypass line (32) that bypasses a steam turbine and supplies steam to the condenser (73); and a spray water line (76) that supplies the feed water to the turbine bypass line (32). The coal gasification combined power generation facility has a normal operation mode and a bypass operation mode, and in the bypass operation mode, a control device (80) supplies the feed water to the turbine bypass line (32) and performs a first opening degree control to control the opening degree of the supply adjustment valve so that the amount of feed water supplied to the exhaust heat recovery boiler becomes less than that in the normal operation mode.

Abstract: There is provided a novel optically active bisphosphinomethane useful as a ligand for an asymmetric catalyst, excellent in oxidation resistance in air, and easy in handling. There is also provided a transition metal complex using the optically active bisphosphinoraethane having excellent asymmetric catalytic ability as a ligand. The optically active bisphosphinomethane is represented by the general formula (1), and the transition metal complex has the optically active bisphosphinomethane as a ligand. (In the formula, R1 represents an adamantyl group; R2 represents a branched alkyl group having 3 or more carbon atoms; and * represents an asymmetric center on a phosphorus atom.

Abstract: A production method by which a biarylphosphine useful as a Buchwald phosphine ligand can be obtained in high purity is provided through an industrially advantageous process. The production method of a biarylphosphine comprises a step A of reacting a lithiated product obtained through lithiation of a halogenated benzene derivative with a benzene derivative to obtain a biphenyl derivative, and a step B of the reacting the biphenyl derivative with a halogenated phosphine. In the step A, the charge molar ratio of the halogenated benzene derivative to the benzene derivative is preferably 1.0 to 5.0.

Abstract: A piston unit is provided with a piston body; a packing mounted on an outer circumferential portion of the piston body; a holding member having a plurality of magnet holding portions that are arranged along a circumferential direction; a plurality of magnets which are held at intervals in the circumferential direction; a first annular yoke disposed on one side in an axial direction of the plurality of magnets; and a second annular yoke disposed on the other side in the axial direction of the plurality of magnets.

Abstract: A coal gasification combined power generation facility includes a feed water supply line that supplies feed water condensed by a condenser to an exhaust heat recovery boiler; a supply adjustment valve that adjusts the flow amount of feed water supplied to the exhaust heat recovery boiler; a turbine bypass line that bypasses a steam turbine and supplies steam to the condenser; and a spray water line that supplies the feed water to the turbine bypass line. The coal gasification combined power generation facility has a bypass operation mode, wherein a control device supplies the feed water to the turbine bypass line and performs a first opening degree control to control the opening degree of the supply adjustment valve so that the amount of feed water supplied to the exhaust heat recovery boiler becomes less than that in a normal operation mode.

Abstract: A seal structure includes a mounting groove disposed in a first member and a packing unit housed in the mounting groove. The packing unit includes an inner circumferential mounting section and an outer circumferential sliding section. Both side surfaces of the packing unit are conical surfaces which are inclined such that their diameters gradually increase in a direction from the mounting section toward the sliding section and which are inclined in mutually opposite directions. The thickness of the packing unit increases in a gradual manner in the direction from the mounting section toward the sliding section, the thickness in the mounting section is the smallest, and the thickness in the sliding section is the largest.

Abstract: Provided is a 2,3-bisphosphinopyrazine derivative represented by the following general formula (1), wherein R1, R2, R3, and R4 represent an optionally substituted straight-chain or branched alkyl group having 1 to 10 carbon atoms, an optionally substituted cycloalkyl group, an optionally substituted adamantyl group, or an optionally substituted phenyl group, R5 represents an optionally substituted alkyl group having 1 to 10 carbon atoms or an optionally substituted phenyl group, each R5 may be the same group or a different group, R6 represents a monovalent substituent, n denotes an integer of 0 to 2.

Abstract: A hydraulic cylinder is provided with a cylinder tube, a piston unit, and a piston rod. The piston unit has a piston body; packing mounted on the piston body; a holding member mounted on the piston body; and a magnet held by a magnet holding part of the holding member. The magnet holding part has a notch that is open on the outer circumferential surface of the holding member.

Abstract: An optically active 2,3-bisphosphinopyrazine derivative represented by the following general formula (1): wherein R1 represents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, an optionally substituted cycloalkyl group, and an optionally substituted aryl group; R2 represents a group selected from a branched alkyl group having 3 or more carbon atoms, an adamantyl group, and an optionally substituted cycloalkyl group, provided that when R1 is a tert-butyl group, R1 and R2 are not the same; R3 represents a monovalent substituent; n represents an integer of 0 to 4; and * represents an asymmetric center on a phosphorus atom.

Abstract: The silyl phosphine compound is represented by the following general formula (1). A content of a compound represented by the following general formula (2) is not more than 0.3 mol %. In the general formula (1), each R is independently an alkyl group having not less than 1 and not more than 5 carbon atoms or an aryl group having not less than 6 and not more than 10 carbon atoms. In the general formula (2), R is the same as in the general formula (1).

Abstract: A method for producing a phosphinobenzene borane derivative comprises a reaction step (A) of obtaining liquid A containing a 1,2-dihalogenobenzene represented by the following general formula (1): obtaining liquid B containing a phosphine borane compound obtained by deprotonating a hydrogen-phosphine borane compound represented by the following general formula (2): and then adding the liquid B to the liquid A to be allowed to react to thereby obtain the phosphinobenzene borane derivative represented by the following general formula (3): According to the present invention, there can be provided the industrially advantageous method for producing the phosphinobenzene borane derivative.

Abstract: An optical fiber bundle manufacturing apparatus includes: a winding member; a guide member movable in a direction parallel to a rotary axis, the guide member being configured to guide an optical fiber wire to any one of first winding positions, a converging winding position and second winding positions; and a processor configured to perform processing to move the guide member such that a first branching portion branching into p branches, a converging portion converging the first branching portion branching into p branches into one, a second branching portion branching into q branches, and a connecting portion connecting the first branching portion and the second branching portion are formed in this order by the optical fiber wire.

Abstract: The process for producing a silyl phosphine compound of the present invention comprises a first step of mixing a solvent having a relative dielectric constant of not more than 4, a basic compound, a silylating agent and phosphine to obtain a solution containing a silyl phosphine compound, a second step of removing the solvent from the solution containing a silyl phosphine compound to obtain a concentrated solution of a silyl phosphine compound, and a third step of distilling the concentrated solution of a silyl phosphine compound to obtain the silyl phosphine compound. The silyl phosphine compound of the present invention is a silyl phosphine compound represented by the following general formula (1), wherein a content of a compound represented by the following general formula (2) is not more than 0.5 mol %. (For explanatory notes of the formulas, see the specification.