摘要:
The present invention relates to a process for preparing acrylic acid by oxidizing acrolein and to an oxidation catalyst.More particularly, the present invention relates to a catalyst and a process for preparing acrylic acid by oxidizing acrolein or a mixed acrolein gas obtained by vapor phase oxidation of propylene with molecular oxygen in the presence of an oxidation catalyst of the empirical formula:Mo.sub.a V.sub.b T.sub.c A.sub.d O.sub.ewherein Mo, V and O represent molybdenum, vanadium and oxygen, respectively, T represents tungsten or antimony, A represents an alkali metal, and a, b, c, d and e represent number of atoms of Mo, V, T, A and O, respectively, and when a is 12, b is 0.5 to 6, c is 0 to 6, d is 0.01 to 1.5, preferably, 0.15 to 1.2 and e is naturally determined by the valence requirements of the other elements present.
摘要:
The preparation of an oxidation catalyst is described, represented by the following general formula:Ni.sub.a Co.sub.b Fe.sub.c Bi.sub.d L.sub.e M.sub.h Mo.sub.f O.sub.g ;in which L is phosphorous, arsenic or boron and M is potassium, rubidium or cesium; and wherein a and b have a value of from 0 to 15, a + b being 2 to 15, c is 0.5 to 7, d is 0.1 to 4, e is 0 to 4, f is 12, g is 35 to 85 and h is 0.01 to 0.5. The oxidation catalyst is useful in a process to produce acrolein by oxidizing propylene in vapor phase.
摘要:
An antenna device for an automobile comprises an electric heating type defogger having heating strips and a bus bar for feeding a current to the heating strips and an antenna conductor having antenna strips arranged to form a pattern, which are fitted on the rear window glass fitted to a rear window opening formed in an automobile, wherein the defogger and the antenna conductor are spaced apart from each other with a predetermined small space in a capacitive coupling relation so a reactance circuit is connected to the defogger to effect anti-resonance between the defogger and the rear window opening of the body of the automobile at the central frequency in terms of logarithmic scale of a broadcast frequency band region; a quality factor value is determined by the inductance of a choke coil in the reactance circuit and the stray capacitance between the defogger and the rear window opening of the body of the automobile so that the ratio of an input impedance to a receiver to the impedance of the antenna conductor viewed from the side of a power feeding terminal becomes 1; and a matching circuit is inserted between the power feeding terminal of the antenna conductor and the receiver so that the sum of the impedance of the antenna conductor viewed from the side of the input terminal of the receiver and the functional part as an antenna in the rear window glass exhibits a little capacitive reactance in a broadcast frequency band region.
摘要:
A catalyst comprising (1) palladium, (2) phosphorus, (3) antimony, (4) X and (5) oxygen wherein X denotes at least one element selected from the group consisting of potassium, sodium, rubidium, lithium, cerium, beryllium, magnesium, calcium, vanadium, strontium, zinc, thorium and rhenium.There is also provided a process for the manufacture of methacrylic or acrylic acid by oxidizing methacrolein or acrolein with molecular oxygen in the vapor phase in the presence of the catalyst defined above.
摘要:
An ejection adjustment pattern forming method of forming an ejection adjustment pattern on a print medium with an inkjet head, which has a plurality of nozzles, with moving the inkjet head in a predetermined scanning direction. The method forms a plurality of thickness measurement patterns respectively on a plurality of pattern forming areas defined on the print medium by causing the plurality of nozzles of the inkjet head to eject ink drops, and forms a plurality of judging patterns respectively on the plurality of pattern forming areas. The ejection conditions of the plurality of nozzles, when the plurality of thickness measurement patterns are formed, are the same among the plurality of pattern forming areas. Further, the ejection conditions of the plurality of nozzles when the first judging pattern is formed and when the second judging pattern is formed are the same among the plurality of pattern forming areas.
摘要:
A preserving agent for fresh marine product comprising (A) at least one salt selected from the group consisting of chlorates, chlorites and hypochlorites; (B) iron powder; and (C) at least one oxide selected from the group consisting of ferric oxide, cobalt oxide, nickel oxide, zinc oxide, titanium oxide, zirconium oxide, germanium oxide, copper oxide, silver oxide and manganese oxide and a method of preserving fresh marine products using the preserving agent;a method for preserving crustaceans which comprises putting crustaceans into a container, covering the container, and quickly adjusting the oxygen concentration within the container to 0.5 to 5 vol %; anda container for preserving fresh marine products in the state of being packed with ice, comprising a receptacle in which said fresh marine products are placed and which has at the bottom thereof at least one hole for draining water therethrough, a removable or hinged lid, and a water-permeable material which is placed so as to drain water therethrough and prevent air outside said container from entering therethrough into said container, and a method of preserving fresh marine products using the container are disclosed.
摘要:
A glass antenna device for an automobile comprises a glass plate fitted to an opening for a window, an antenna conductor having a power feeding point arranged on the glass plate and a matching circuit electrically connected to the power feeding point.
摘要:
A fuel injection valve for use in an internal combustion engine includes a nozzle having a nozzle needle, a nozzle holder supporting the nozzle, first and second springs provided in the nozzle holder and determining valve opening pressures for initial injection and main injection, respectively, a first movable spring seat supported by the nozzle needle and supporting the first spring, and a second movable spring seat having a rod mounted thereon and supporting the second spring, the rod being disposed in spaced and opposed relation to the first movable spring seat. In the nozzle holder are formed first and second spring chambers with the first and second springs fitted therein, respectively. A stepped portion is provided between the first and second spring chambers. The nozzle holder has a reference surface at its end portion remote from the nozzle, with respect to which various portions of the injection valve are measured. A set screw is threadedly fitted in a tapped bore formed therein and having a contact surface disposed in contact with the reference surface. A first shim is interposed between the first spring and an end face of the stepped portion and determines the setting force of the first spring, a second shim between the other end face of the stepped portion and the second movable spring seat and determines the lifting amount of the nozzle needle during the initial injection, and a third shim between the second spring and an end face of the set screw and determines the setting force of the second spring.
摘要:
A forming jig comprises a rectification plate having two or more material supply holes, a drawing die installed below the rectification plate to specify the external configuration of the formed body produced from a material, and a floating die in which two or more wires float vertically in spaces in the drawing die, forming pattern passages, and stretch from an exit section of the drawing die to form a hollow hole-forming pattern. The forming jig can easily and inexpensively design or change the design of a forming pattern of hollow holes and the external configuration of a formed body, and can form fine hollow holes at a high density.
摘要:
A sensor in IC formation has a light emitting means, and a light receiving means disposed for receiving a faint pulsed light generated by scattering of light emitted from the light emitting means, in which a switching means capable of short-circuiting between sensor circuit lines is provided for being triggered by a counter means operated in response to an output from the light receiving means, and constituent elements of respective components of the sensor including the said means and capable of being formed in the IC are formed as integrated circuits on a dielectric isolation substrate, whereby electric isolation of the respective elements can be made complete irrespective of light irradiation to realize effective interelement junction and isolation.