摘要:
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.
摘要:
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.
摘要:
The present invention provides a process for producing highly pure fluoro-compounds by making use of N-(2-chloro-1,1,2-trifluoroethyl)diethylamine. The process produces little or no chlorinated by-products. The present invention provides a process for producing a fluoro-compound, comprising fluorinating an alcohol derivative represented by the following general formula (I): R1R2R3COH (I), (wherein R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, aryl group, alkylcarbonyl group, alkoxycarbonyl group, arylcarbonyl group or aryloxycarbonyl group; and R2 and R3 are each independently a substituted or unsubstituted alkyl group, aryl group, alkylcarbonyl group, alkoxycarbonyl group, arylcarbonyl group or aryloxycarbonyl group, wherein at least two of R1, R2 and R3 may together form part of a ring structure, either with or without a heteroatom) with N,N-diethyl-2-chloro-1,1,2-trifluoroethylamine to form a fluoro-compound represented by the following general formula (2): R1R2R3CF (2), (wherein R1, R2 and R3 are as defined above), the process being characterized in that an alcohol derivative represented by the following general formula (3): R4OH (3), (wherein R4 represents a substituted or unsubstituted alkyl group or aryl group) is added to the reaction system.
摘要:
The present invention provides a process for producing highly pure fluoro-compounds by making use of less costly and readily handleable N-(2-chloro-1,1,2-trifluoroethyl)diethylamine. The process produces little or no chlorinated by-products.Specifically the present invention provides a process for producing a fluoro-compound, comprising fluorinating an alcohol derivative represented by the following general formula (1): R1R2R3COH (1) (wherein R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, aryl group, alkylcarbonyl group, alkoxycarbonyl group, arylcarbonyl group or aryloxycarbonyl group; and R2 and R3are each independently a substituted or unsubstituted alkyl group, aryl group, alkylcarbonyl group, alkoxycarbonyl group, arylcarbonyl group or aryloxycarbonyl group, wherein at least two of R1, R2 and R3 may together form part of a ring structure, either with or without a heteroatom) with N,N-diethyl-2-chloro-1,1,2-trifluoroethylamine to form a fluoro-compound represented by the following general formula (2): R1R2R3CF (2) (wherein R1, R2 and R3 are as defined above), the process being characterized in that an alcohol derivative represented by the following general formula (3): R4OH (3) (wherein R4 represents a substituted or unsubstituted alkyl group or aryl group) is added to the reaction system.
摘要:
The invention is directed to an unfailing pickup operation of an electronic component from a component storage portion at a seam of storage tapes connected even using a connection tape and prevention of reduction in a pickup rate of an electronic component. A CPU sends a feeding command to a component feeding unit to perform a component feeding operation or the like. Then, when the CPU judges that a connection tape reaches a pickup position, the CPU drives an X axis drive motor and a Y axis drive motor to move a board recognition camera to the pickup position of the feeding unit, the camera takes an image of a storage portion of a storage tape, and a recognition processing device performs recognition processing. A correction value based on a result of this recognition processing is stored in a RAM, and a suction nozzle is moved taking this correction value into account and lowers to pick up an electronic component.
摘要:
A halogen lamp including a glass bulb, a filament inserted inside the bulb, a pair of metal foils, and a pair of outer leads. Each metal foil has one end welded to the filament and the other end welded to the outer lead. The metal foils are contained in glass sleeves and they are collectively inserted inside the bulb. The bulb is softened by heating and shrinks because its inside pressure is reduced to seal the metal foils therein. Since the amount of glass of each sealed portion is larger than the other portions of the bulb by the amount of the sleeve, the shape of the sealed portion is stabilized.
摘要:
A muting circuit comprising: a DC offset eliminating unit including an HPF (High Pass Filter) constituted by a first operational amplifier to eliminate a DC offset component of an AC input signal, the DC offset eliminating unit being configured to output an output signal obtained by eliminating the DC offset component of the AC input signal; a muting signal generating unit including a second operational amplifier configured to generate a second DC offset identical in level to a first DC offset at the first operational amplifier, the muting signal generating unit being configured to output a muting signal indicative of the second DC offset by fixing input to the second operational amplifier at a predetermined DC level; and a selecting unit configured to select and output the output signal when muting is not executed, and to select and output the muting signal when muting is executed.
摘要:
This invention is directed to prevention of reduction of a pickup rate of an electronic component when a component feeding unit is dismounted from a feeder base and mounted back thereon. A CPU sends a feeding command to a component feeding unit feeding an electronic component belonging to a first step number, and drives a servomotor and a drive motor of the feeding unit to perform a component feeding operation and so on. After then, when the CPU judges that the feeding unit is dismounted from the feeder base and mounted back thereon, the CPU drives a X axis drive motor and a Y axis drive motor to move a board recognition camera to the pickup position of the feeding unit, the camera takes an image of a storage portion of a storage tape, and a recognition processing device performs recognition processing to the image. A correction value based on this recognition result is stored in a RAM, the X axis drive motor and the Y axis drive motor are driven taking this correction value into account, a vertical axis drive motor is driven, and a suction nozzle lowers and picks up the electronic component.
摘要:
A charge method for charging a usage fee of an image forming apparatus is disclosed. The charge method includes the steps of a) storing contents source data and contents source fee data corresponding to the contents source data, b) obtaining a first data item selected by a user, c) obtaining one item of the contents source data selected by the user, d) generating image formation information based on the first data item and the one item of the contents source data selected by the user, and e) calculating a charge fee corresponding to the image formation information in accordance with the contents source fee data.
摘要:
An optical isolator module having a capillary 3 to which an optical fiber 2 has been fitted, an optical isolator 7 provided on the light-incident side of the capillary and a transparent member 8, and being set in a housing of a semiconductor module. The optical isolator module is provided on the side opposite to the light-incident side of the capillary, with a hermetic bead 11 which i) holds an optical fiber 2 which extends from the capillary in the direction opposite to its light-incident side and whose bare fiber stands uncovered by removing a resin coat, and ii) is fitted in a hermetically sealable state into an opening made in a housing side wall of the semiconductor module.