摘要:
Specified image transformation is applied to a first source video signal to generate a main image and symmetric image transformation is applied to a second source video signal same as or different from the first source video signal in accordance with the image transformation applied to the main image and the point, line, or plane specified as a symmetry yardstick to generate a symmetric image point-symmetric, line-symmetric, or plane-symmetric to the main image. Thereby, it is possible to easily obtain a symmetric image symmetric to a main image to which image transformation is applied only by specifying a point, line, or plane serving as a symmetry yardstick.
摘要:
The present invention provides a fluidized bed catalyst for the synthetic reaction of organic compounds which has a reduced catalyst loss. A fluidized bed catalyst for organic compound synthetic reaction, characterized in that 90% or more of the catalyst particles is in the range of 5-500 .mu.m on the weight-based particle size distribution and 90% or more of the 20-75 .mu.m particles has a crushing strength which satisfies the following equation:CS>A.multidot.d.sub..alpha.wherein CS represents a crushing strength �g-weight/particle!,A represents a constant 0.001,d represents a particle diameter �.mu.m!, and.alpha. represents a constant 2.
摘要:
A local oscillator system carries out a frequency switching method, in which local signals with fewer spurious components can be obtained. The local oscillator system is provided with frequency generators for generating signals with different frequencies and frequency dividers connected to the frequency generators. The dividers divide the frequency of the signals to output the frequency-divided signals while operating in an active mode and output undivided signals while the dividers are operating in inactive mode. The dividers are controlled so that one of the dividers is in the active mode and the remaining dividers are in the inactive mode. The output signals from the dividers are combined with each other to form a single output signal and then the single output signal is sent to a filter. The filter selects a component having a desired local frequency from the single output signal. Spurious components caused by unselected frequencies are removed by the filter because they are not divided.
摘要:
A composition which contains as essential components: crystalline iron antimonate and at least one element selected from the group consisting of vanadium, molybdenum, and tungsten; is useful as a catalyst in the oxidation reaction of organic compounds. Also, a process for producing the composition is disclosed.
摘要:
A catalyst in the form of a honeycomb structured cordierite carrier having platinum supported in a loading weight of at least 0.20 mg per square centimeter of the apparent outer surface area of the catalyst is effective in a process for oxidizing CO in exhaust gas from a sintering furance wherein it maintains high CO oxidiation efficiency for a longer period of time, requiring less frequently regeneration and less power consumption.
摘要:
A process for preparing an antimony/tellurium-containing metal oxide catalyst, comprising preparing a slurry containing an antimony compound, a polyvalent metal compound, and a silica support starting material selected from silica sol and mixtures of silica sol and white carbon, fumed silica or silica hydrogel, heating the slurry at a pH or 7 or less and a temperature of at least 40.degree. C., mixing the above heat treated slurry with a tellurium solution which has been independently prepared by oxidizing metallic tellurium with hydrogen peroxide in the presence of the oxide, oxyacid or oxyacid salt of at least one metal selected from the group consisting of vanadium, molybdenum and tungsten, and then drying and calcining the resulting mixture.
摘要:
The activity of a tellurium-free metal oxide catalyst used for ammoxidation of organic compounds at a temperature of from 300.degree. C. to 600.degree. C. is improved in the presence of (a) elemental tellurium or a tellurium compound which is in contact with said catalyst or in the presence of (a) elemental tellurium or a tellurium compound and (b) a molybdenum compound which are in contact with said catalyst. This activity improvement process can be applied to both the fresh catalysts and the spent catalyst having a deteriorated activity. The above described component (a) is preferably composed of a tellurium containing solid to be used in a state of a dry physical mixture with said catalyst. The above described components (a) and (b) are preferably composed of a tellurium containing solid and a molybdenum containing solid respectively or a tellurium-molybdenum containing solid to be used in a state of a dry physical mixture with said catalyst.The tellurium containing solid, the molybdenum containing solid or the tellurium-molybdenum containing solid may be at least a member selected from the following group:(1) A solid wherein a tellurium component and/or a molybdenum component is supported or unsupported on an inert carrier,(2) A solid wherein a tellurium component and/or a molybdenum component is added to a metal oxide catalyst (fresh or spent) and/or said metal oxide catalyst is enriched with the tellurium component and/or the molybdenum component, and(3) A solid composed of a compound containing at least one element selected from the group consisting of an alkali metal, an alkaline earth metal, La, Ce, V, Nb, Cr, W, Mn, Fe, Co, Ni, Cu, Zn, Cd, B, Al, Ga, Ge, Sn, Pb, P, AS, Sb, Bi, S and Se in addition to tellurium, molybdenum or tellurium and molybdenum, or a mixture of these compounds, supported or unsupported on an inert carrier.The present invention is advantageously applied to ammoxidation in a fluidized bed.
摘要:
Iron-antimony metallic oxide catalysts which have become deactivated after being used for the production of aldehydes, acids, nitriles, or dienes through oxidation, ammoxidation, or oxidative dehydrogenation of organic compounds in fluidized-bed reactors are regenerated by adding to the catalyst a molybdenum-enriched catalyst formed by supporting a molybdenum component which is volatile or capable of forming a volatile compound under reaction conditions on a metallic oxide catalyst. The metallic oxide catalysts contain as essential components (I) Fe, (II) Sb, (III) at least one element selected from the group consisting of V, Mo and W, and (IV) Te.
摘要:
A process for producing acrylonitrile by the vapor-phase catalytic ammoxidation of propylene, which comprises(I) reacting propylene, a molecular oxygen-containing gas and ammonia in the presence of a catalyst expressed by the following empirical formulaFe.sub.a Sb.sub.b Mo.sub.c Me.sub.d Te.sub.e Q.sub.f Na.sub.g O.sub.h. (SIO).sub.iwherein Me is at least one element selected from the group consisting of V and W,Q is at least one element selected from the group consisting of Cu, Mg, Zn and Ni, andthe subscripts a, b, c, d, e, f, g, h and i each represents atomic ratios such that when a=10; b=13 to 28; c=0.1 to 2.5; d=0.05 to 1; e=0.2 to 5; f=0 to 4 (in which case b=13 to 20), or f=2 to 6 (in which case b=20 to 28); g=0 to 3; h=the number of oxygens corresponding to the oxide formed by the combination of the components, and i=25 to 200;in a fluidized bed catalytic reaction zone at a temperature of about 380 to about 500.degree. C. and a pressure of about 0.2 to about 3 kg/cm.sup.2 -G while adjusting the propylene/oxygen/ammonia molar ratio to about 1:about 1:about 0.8 to about 1:about 4:about 3;(II) the catalyst being prepared by(1) intimately mixing starting materials for the Fe, Mo, Me, Te and Q components in a form soluble in water or nitric acid, a starting material for the Sb component, and silica sol which may or may not contain an Na component, thereby to form a slurry containing these components and having a non-volatile solids content of about 10 to about 50% by weight;(2) so that the composition of the final catalyst is within the range expressed by the empirical formula above;(3) spray-drying the resulting slurry, and(4) calcining the resulting spray-dried particles at a temperature of about 600 to about 950.degree. C. thereby to form a catalyst with a composition within the above empirical formula and with all of the Mo, Me, and Te components substantially dissolved in an iron/antimony oxide compound (FeSbO.sub.4) in the form of a solid solution.
摘要:
This invention provides a process for simultaneously producing methacrylonitrile and butdiene which comprises contacting a mixture of mixed butenes containing isobutene and n-butenes, oxygen and ammonia as the substantial reactants with a catalyst containing as the active component a composition having the empirical formula Fe.sub.10 Sb.sub.5.sub.-60 Me.sub.0.01.sub.-10 -Te.sub.0.05.sub.-5 X.sub.0.sub.-5 O.sub.20.sub.-225 wherein Me is at least one element selected from the group consisting of V, Mo and W and X represents P and/or B in vapor phase.