摘要:
A process for removing NO x and CO simultaneously is characterized in that an exhaust gas comprising NO x , CO and O 2 is contacted with a catalyst in the presence of steam and ammonia to reduce NO, into harmless N 2 and also to react CO with H 2 0 to convert them into CO 2 and H 2 over the same catalyst. The catalyst comprises titanium oxide, oxide of at least one metal selected from the group consisting of molybdenum, tungsten, vanadium, cerium, nickel, cobalt and manganese, and at least one metal selected from the group consisting of platinum, palladium, rhodium and ruthenium.
摘要:
A method of catalytic combustion using a heat-resistant catalyst suitable for combustion at a temperature ranging from 800°C tp 1500°C is disclosed. The catalyst has a carrier which may be La-β-Al₂O₃ or another rear earth-alumina or a Group IIa, IIIa or IV oxide, nitride or carbide. Particles of a platinum group metal are dispersed on the carrier as active component. Dispersed on the particles of active component are particles of base metal selected from Mg, Mn, Ni, Co, Sr, Nb, Zn, Sn, Cr and Zr. The base metal has the effect of suppressing agglomeration of the active component at high temperature.
摘要:
A process for removing nitrogen oxides from exhaust gases containing at least nitrogen oxides and volatile metal compounds by the use of a catalyst having prevented activity reduction due to the volatile metal compounds and having a superior durability is provided, which process comprises contacting the exhaust gases with a catalyst containing TiO₂, a compound active to nitrogen oxides-removing reaction such as oxides of V, Cr, Mo, W, Fe, Co, Ni, Cu, Ce, etc. and/or sulfates thereof and a metal sulfate containing water of crystallization such as those of Aℓ, Mg or Mn, in the presence of ammonia at 150° to 600°C.
摘要:
A process for removing nitrogen oxides from exhaust gases containing at least nitrogen oxides and volatile metal compounds by the use of a catalyst having prevented activity reduction due to the volatile metal compounds and having a superior durability is provided, which process comprises contacting the exhaust gases with a catalyst containing TiO₂, a compound active to nitrogen oxides-removing reaction such as oxides of V, Cr, Mo, W, Fe, Co, Ni, Cu, Ce, etc. and/or sulfates thereof and a metal sulfate containing water of crystallization such as those of Aℓ, Mg or Mn, in the presence of ammonia at 150° to 600°C.
摘要:
An anti-reflection film (2) is produced on the panel surface of a cathode-ray tube (1) by: (A) preparing a solution (8) for forming an anti-reflection film (2), which contains water and an alkoxide having the formula, M(OR) n wherein M is Si or a metal selected from the group consisting of Ti, Al, Zr, Sn, In, Sb and Zn; R is an alkyl group having 1-10 carbon atoms; n is an integer of from 1 to 8; and when n is not 1, the alkyl groups represented by R may be the same or different, (B) coating the solution (8) for forming an anti-reflection film (2) on the outermost surface of the panel of a cathode-ray tube (1), and (C) applying an ultraviolet light (7) to the solution (8) for forming an anti-reflection film (2) coated on said surface to cure the solution to form a transparent film with fine roughness. This production method is carried out using an apparatus having: (a) a coating means (3) for coating the above solution (8) for forming an anti-reflection film (2) on the outermost surface of the panel of a cathode-ray tube (1), (b) a transferring means (4) for transferring the solution-coated cathode-ray tube (1), and (c) an ultraviolet light-applying means (7) for photocuring the solution (8) coated on the cathode-ray tube (1) during the transfer of the solution-coated cathode-ray tube. In the above method, when a silicon alkoxide is used as the metal alkoxide, there can be obtained a cathode-ray tube having an anti-reflection film made of alkali-free silica on the outermost surface of the panel, said anti-reflection film giving a ratio of Si-O-Si peak intensity to Si-OH peak intensity of 4 or more when measured for infrared spectrum. Further embodiments include an antistatic layer and the inclusion of an organic dye into the anti-reflection film.
摘要:
In a magnetic head, a pair of magnetic cores, which include magnetic films (1, 1') of a high saturation magnetic flux density formed respectively on substrates (2, 2',) are opposed to each other with a magnetic gap (3) provided therebetween, and the magnetic head is bonded by oxide glass (4, 4') comprising vanadium element as one of main constituent elements. An intervening layer (5, 5',) containing at least one of the constituent elements of the bonding glass, is provided between the bonding glass and a material to be bonded. According to the present invention, excellent characteristics of the bonding glass can be sufficiently utilized, and the magnetic head excellent in mass-producibility and reliability can be obtained. And besides, even when conventional glass is used as the bonding glass, the intervening layer defined in the present invention is effective.