Abstract:
[PROBLEMS] To provide a gas-insulated switching device which employs an alternative gas to SF6 as the insulation gas, and shows little environmental load, high insulation resistance and excellent gas circuit-breaking performance. [MEANS FOR SOLVING PROBLEMS] A gas-insulated switching device comprising a switching unit included in a container having an insulation gas filled therein, wherein the insulation gas contains CF3I and CO2 and the fractional pressure of CF3I is 15% or greater.
Abstract:
A catalyst for oxidizing 2,2,2-trifluoroethanol to form trifluoroacetaldehyde. The catalyst has a long life and achieves high conversion and selectivity. The catalyst of the present invention comprises one or more metal oxides, including at least vanadium oxide, and zirconia as a carrier.
Abstract:
A gas pedal (100) comprises a stop (30) attached to the floor of a driver’s seat, a pad (20) fastened to the stop (30) and operated by the driver’s stepping force, an arm (4) adapted to be engaged by the pad (20) to transmit the stepping force, and a bracket (5) engaged by the arm (4) to support the arm (4), wherein the stop (30) has a pad fitting section (17) installed therein to fasten the pad (20), the pad (20) being integrally molded of single resin material.
Abstract:
The invention provides a process for the preparation of 2,2,2-trifluoroethanol by reacting a Ϝ-hydroxybutyric acid salt with 1,1,1-trifluoro-2-chloroethane which brings about an increase in the yield of 2,2,2-trifluoroethanol and enables easy separation of by-product salts and recovery and recycling of an aprotic polar solvent. The invention relates to a process for the preparation of 2,2,2-trifluoroethanol by reacting a Ϝ-hydroxybutyric acid salt with 1,1,1-trifluoro-2-chloroethane in an aprotic polar solvent, characterized by using a Ϝ-hydroxybutyric acid salt having a 4,4’-oxydibutyric acid content of 6 wt% or below.
Abstract:
A method of separating a purified 2-fluoro-3-oxoalkylcarboxylic acid ester as a reaction product from a liquid reaction mixture obtained by fluorinating a 3-oxoalkylcarboxylic acid ester, characterized by comprising removing the hydrogen fluoride yielded as a by-product from the liquid reaction mixture and then separating the 2-fluoro-3-oxoalkylcarboxylic acid ester by distillation. Thus, a high-purity 2-fluoro-3-oxoalkylcarboxylic acid ester, which is useful as an intermediate for medicines and agricultural chemicals, can be separated from the liquid reaction mixture resulting from the fluorination of a 3-oxoalkylcarboxylic acid ester.
Abstract:
The present invention concerns a method for purifying/separating a 2-fluoro-3-oxoalkylcarboxylic acid ester from a reaction mixture resulting from the fluorination of a 3-oxoalkylcarboxylic acid ester. The method involves depleting the reaction mixture of a hydrogen fluoride byproduct; and subsequently, separating the 2-fluoro-3-oxoalkylcarboxylic acid ester by distillation. The 2-fluoro-3-oxoalkylcarboxylic acid ester obtained by the method of the invention is highly pure and is thus suitable for use as an intermediate for the production of pharmacological products or agricultural chemicals.
Abstract:
A process for the preparation of fluorinated dicarbonyl compounds of general formula (2), comprising reacting dicarbonyl compounds of general formula (1) with fluorine gas without any solvent in the presence of one or more acids selected from among trifluoromethanesulfonic acid, methanesulfonic acid, hydrofluoric acid, sulfuric acid, trifluoroacetic acid, boron trifluoride and sulfonated polymers wherein R?1, R2 and R3¿ are each hydrogen, alkyl or the like; and R?1a, R2a and R3a¿ are each the same as defined for R?1, R2 and R3¿, or alternatively when R?1, R2 and R3¿ are each hydrogen, the hydrogen may be replaced by fluorine, while when R?1, R2 and R3¿ are each optionally substituted alkyl, one or more hydrogen atoms on the α-position carbon atom to the CO-group may be replaced by fluorine. This process can give fluorinated dicarbonyl compounds in high yields and at high selectivity.
Abstract:
A process for the preparation of fluorinated dicarbonyl compounds of general formula (2), comprising reacting dicarbonyl compounds of general formula (1) with fluorine gas without any solvent in the presence of one or more acids selected from among trifluoromethanesulfonic acid, methanesulfonic acid, hydrofluoric acid, sulfuric acid, trifluoroacetic acid, boron trifluoride and sulfonated polymers wherein R?1, R2 and R3¿ are each hydrogen, alkyl or the like; and R?1a, R2a and R3a¿ are each the same as defined for R?1, R2 and R3¿, or alternatively when R?1, R2 and R3¿ are each hydrogen, the hydrogen may be replaced by fluorine, while when R?1, R2 and R3¿ are each optionally substituted alkyl, one or more hydrogen atoms on the α-position carbon atom to the CO-group may be replaced by fluorine. This process can give fluorinated dicarbonyl compounds in high yields and at high selectivity.
Abstract:
There is provided an end plate ( 1 ) that includes a through hole ( 40 ) that causes a central part ( 14 ) of an outer wall portion ( 10 ) and a central part ( 24 ) of an inner wall portion ( 20 ) to communicate with each other, into which an intruding portion ( 72 ) provided in a wheel-side member ( 70 ) can intrude, a first press-formed portion ( 50 ) formed with a recessed portion ( 52 ) formed by depressing in a peripheral edge ( 42 ) of the through hole ( 40 ) in the inner wall portion ( 20 ). The end plate ( 1 ) further includes a second press-formed portion ( 60 ) arranged in a part of a peripheral edge ( 26 ) on the side of a peripheral end ( 22 ) of the inner wall portion ( 20 ), which is a remnant of a portion where the first press-formed portion ( 50 ) is arranged in the inner wall portion ( 20 ), and formed therein with a protruding portion ( 62 ) by protruding a part of the peripheral edge, and a screw hole ( 64 ) formed by penetrating through the protruding portion ( 62 ) in the second press-formed portion ( 60 ) between the outer wall portion ( 10 ) and the inner wall portion ( 20 ).
Abstract:
To realize weight saving of a vehicle subframe (1), (1'), (1"), while ensuring required strength and stiffness thereof with a simple configuration, there are provided a first hole portion (12), (12'), (12") in at least one of an upper member (20) and a lower member (60) in a first region (R2), and a second hole portion (14), (14'), (14") in at least one of the upper member (20) and the lower member (60) in a second region (R2).