摘要:
A method of production of an α+β-type titanium alloy part for a motorcycle, car, or bicycle which has a high Young's modulus (rigidity) in the axial direction of the shaped product and a bolt, engine valve, or connecting rod made of an α+β-type titanium alloy and a method of production of the same, wherein an α+β-type titanium alloy is heated at the temperatures giving the β-single phase, then is uni-directionally hot rolled, the plate is machined so that a direction vertical to both the hot rolling direction and thickness direction (width direction) corresponds to the direction in which high rigidity is demanded in the finished part, that is, the axial direction of the bolt, engine valve, or connecting rod, and the X-ray diffraction intensities I(0002), I(10-10), and I(10-11), of the (0002) plane, (10-10) plane, and (10-11) plane of the titanium α-phase measured at the cross-sections vertical to the longitudinal axial direction of the parts satisfy I(0002)/[I(10-10)+I(10-11)]≧1.
摘要:
This invention provides a process for producing 2,3,3,3-tetrafluoropropene, the process comprising: (1) a first reaction step of reacting hydrogen fluoride with at least one chlorine-containing compound selected from the group consisting of a chloropropane represented by Formula (1): CClX2CHClCH2Cl, wherein each X is the same or different and is CI or F, a chloropropene represented by Formula (2): CClY2CCl═CH2, wherein each Y is the same or different and is CI or F, and a chloropropene represented by Formula (3): CZ2═CClCH2Cl, wherein each Z is the same or different and is CI or F in a gas phase in the absence of a catalyst while heating; and (2) a second reaction step of reacting hydrogen fluoride with a reaction product obtained in the first reaction step in a gas phase in the presence of a fluorination catalyst while heating. According to the process of this invention, 2,3,3,3-tetrafluoropropene (HFO-1234yf) can be obtained with high selectivity, and catalyst deterioration can be suppressed.
摘要:
The present invention provides a method for purifying HFO-1234yf, comprising the steps of (1) cooling a liquid mixture containing HFO-1234yf and HF to separate the mixture into a upper liquid phase having a high concentration of HF and a lower liquid phase having a high concentration of 2,3,3,3-tetrafluoropropene; and (2) subjecting the lower liquid phase obtained in step (1) to a distillation operation to withdraw a mixture containing HFO-1234yf and HF from a top of a distillation column, thereby obtaining substantially HF-free HFO-1234yf from a bottom of the distillation column. According to the present invention, HF and HFO-1234yf contained in a mixture containing HF and HFO-1234yf can be separated under simple and economically advantageous conditions.
摘要:
The present invention provides a process for producing 2,3,3,3-tetrafluoropropene, comprising distilling a mixture of water and 2,3,3,3-tetrafluoropropene to separate the mixture into a first stream and a second stream, the first stream containing 2,3,3,3-tetrafluoropropene with a water content higher than the original mixture, and the second stream containing 2,3,3,3-tetrafluoropropene with a water content lower than the original mixture; and obtaining 2,3,3,3-tetrafluoropropene with a reduced water content from the second stream. The process of the invention can efficiently remove water from 2,3,3,3-tetrafluoropropene (HFO-1234yf).
摘要:
According to one embodiment, a liquid crystal display device includes a first substrate including a first storage capacitance line and a second storage capacitance line, a gate line located between the first storage capacitance line and the second storage capacitance line, a semiconductor layer located at a substantially central part of a pixel, a source line put in contact with the semiconductor layer, a drain electrode which is put in contact with the semiconductor layer and extends above the first storage capacitance line and the second storage capacitance line, and a pixel electrode including a first main pixel electrode opposed to the first storage capacitance line, and a second main pixel electrode opposed to the second storage capacitance line.
摘要:
A half-duplex communication system that allows a user terminal to confirm past communication contents even during a series of half-duplex communications is provided. The system includes a communication record database in which all communication contents of half-duplex communications are stored together with identifiers thereof. A half-duplex communication device for controlling half-duplex communications includes a communication record control device which receives a communication content, transmits the communication content together with the identifier thereof to the communication record database so as to store it therein, and reads out the communication record therein. In response to a communication record readout request, the half-duplex communication device reads out a communication record in place of transmitting the communication content to a user terminal.
摘要:
A CPU divides a moving image file at a divided frame position, thereby generating a first divided moving image file including a first frame and another divided moving image file. The CPU detects a frame position where an object appears for the first time in the reproduction order from the other divided moving image file, and generates a file that describes the detected position as a new face information management file. The CPU controls a recording/reproduction control circuit to store the generated new face information management file in a recording medium in association with the other divided moving image file.
摘要:
This invention provides a method for purifying HFO-1234yf by removing HF from a mixture of HFO-1234yf and HF under simple and economically advantageous conditions. According to the present invention, this is a purification method for 2,3,3,3-tetrafluoropropene, (1) the purification method comprising the step of subjecting a mixture comprising 2,3,3,3-tetrafluoropropene and hydrogen fluoride to extractive distillation in a distillation column A using an extractant, thereby obtaining a fraction I that contains 2,3,3,3-tetrafluoropropene and has a lower ratio of hydrogen fluoride to 2,3,3,3-tetrafluoropropene than that of the mixture, while obtaining a fraction II that contains hydrogen fluoride and has a lower ratio of 2,3,3,3-tetrafluoropropene to hydrogen fluoride than that of the mixture; (2) the extractant comprising at least one member selected from the group consisting of: (i) alcohols represented by ROH, wherein R is a C1-5 alkyl group, (ii) ethers represented by ROR′, wherein R and R′ are the same or different, and each is a C1-4 alkyl group, (iii) fluorinated alcohols represented by RfOH, wherein Rf is a C1-3 fluoroalkyl group, (iv) ketones represented by RCOR′, wherein R and R′ are the same or different, and each is a C1-4 alkyl group, (v) esters represented by RCOOR′, wherein R and R′ are the same or different, and each is a C1-4 alkyl group, (vi) polyols represented by R(OH)n, wherein R is a C1-4 alkyl group, and n is an integer of 2 to 3, and (vii) ethylene glycols represented by R1O(CH2CH2O)nR2, wherein R1 and R2 are the same or different, and each is hydrogen or a C1-4 alkyl group, and n is an integer of 1 to 3.
摘要:
A method of production of an α+β-type titanium alloy part for a motorcycle, car, or bicycle which has a high Young's modulus (rigidity) in the axial direction of the shaped product and a bolt, engine valve, or connecting rod made of an α+β-type titanium alloy and a method of production of the same, wherein an α+β-type titanium alloy is heated at the temperatures giving the β-single phase, then is uni-directionally hot rolled, the plate is machined so that a direction vertical to both the hot rolling direction and thickness direction (width direction) corresponds to the direction in which high rigidity is demanded in the finished part, that is, the axial direction of the bolt, engine valve, or connecting rod, and the X-ray diffraction intensities I(0002), I(10-10), and I(10-11), of the (0002) plane, (10-10) plane, and (10-11) plane of the titanium α-phase measured at the cross-sections vertical to the longitudinal axial direction of the parts satisfy I(0002)/[I(10-10)+I(10-11)]≦1.
摘要:
The present invention provides a β-type titanium alloy that includes, by mass %, when Al: 2 to 5%, 1) Fe: 2 to 4%, Cr: 6.2 to 11%, and V: 4 to 10%, 2) Fe: 2 to 4%, Cr: 5 to 11%, and Mo: 4 to 10%, or 3) Fe: 2 to 4%, Cr: 5.5 to 11%, and Mo+V (total of Mo and V): 4 to 10% in range, and a balance of substantially Ti. These include Zr added in amounts of 1 to 4 mass %. Furthermore, by making the oxygen equivalent Q 0.15 to 0.30 or leaving the alloy in the work hardened state or by applying both, the tensile strength before aging heat treatment can be further increased.
摘要翻译:本发明提供一种当Al:2〜5%,1)Fe:2〜4%,Cr:6.2〜11%,V:4〜10%时质量%的钛合金, 2)Fe:2〜4%,Cr:5〜11%,Mo:4〜10%,3)Fe:2〜4%,Cr:5.5〜11%,Mo + V V):范围为4至10%,余量基本上为Ti。 这些包括添加量为1〜4质量%的Zr。 此外,通过使氧当量Q为0.15〜0.30,或使合金处于加工硬化状态,或通过施加两者,可以进一步提高时效热处理前的拉伸强度。