Showing papers on "Bimetallic strip published in 1985"
65 citations
TL;DR: In spite of its low intrinsic catalytic activity, gold can influence the activity and selectivity of group VIII metals, such as palladium, platinum and ruthenium as mentioned in this paper.
Abstract: In spite of its low intrinsic catalytic activity, gold can influence the activity and selectivity of group VIII metals, such as palladium, platinum and ruthenium. Gold-containing bimetallic catalysts have found important industrial applications and represent an active research area for elucidating the correlation between surface structure and catalytic activity.
65 citations
TL;DR: In this paper, the performance of a supported bimetallic catalyst was investigated with in situ Mossbauer spectroscopy and X-ray photoelectron spectrographs.
45 citations
31 citations
Patent•
09 Jul 1985
TL;DR: In this article, a temperature sensitive gasket comprised of an annular ring formed by alternating layers of a spirally wound bimetallic strip and an adjacent strip of soft filler material, such as Teflon, is presented.
Abstract: A temperature-sensitive gasket comprised of an annular ring formed by alternating layers of a spirally wound bimetallic strip and an adjacent strip of soft filler material, such as Teflon. When viewed in cross-section, the bimetallic strip has a centrally located V-shaped fold in an otherwise flat surface. Differences in the relative rates of thermal expansivity between the convex surface and the concave surface of the bimetallic strip cause the edges of the strip to spread apart, providing a reversably tighter seal between the surfaces adjacent the gasket. The spiral wound bimetallic and filler strips are also used in combination with annular compression rings.
29 citations
TL;DR: In this paper, a stepwise chemisorption and titration procedure involving H2 and O2 as adsorbates is used to measure the dispersion of the individual metal components in bimetallic RuAu SiO 2 catalysts.
28 citations
Patent•
06 Nov 1985
TL;DR: In this article, a method and apparatus for heating a strip of metallic material in a continuous annealing furnace is described. But the present method is not suitable for the case of a continuous anealing process.
Abstract: The present invention relates to method and apparatus for heating a strip of metallic material in a continuous annealing furnace and more particularly to an improvement relating to a method and apparatus for heating a strip of metallic material in a continuous annealing furnace in which annealing of the strip is continuously carried out in such a manner that a gas, serving to adjust temperature of the strip, is blown toward the strip through a plurality of gas jet nozzles which are arranged on one side or both sides of the strip, wherein the temperature and flow rate of the strip are properly determined to a required level in response to the changing of the operating conditions such as the heat cycle, line speed, thickness of strip, width of strip and the like. Further, the present invention relates to a method and apparatus for heating a strip of metallic material in a continuous annealing furnace, wherein the temperature of the strip is controlled to reach a target temperature by heating or cooling the strip by means of a gas jet or the like having excellent respondency at a part of the heating zone in the continuous annealing furnace whereby irregular annealing of the strip is effectively inhibited.
28 citations
TL;DR: In this paper, the effect of varying miscibility of the components on the structural features of the bimetallic clusters was investigated, in view of the limited coherence of either iridium or rhenium with copper in the bulk.
Abstract: The extended x‐ray absorption fine structure (EXAFS) associated with the LIII absorption edges of rhenium, iridium, and platinum, and the K absorption edge of copper, has been used to study the structures of silica supported Re–Cu, Ir–Cu, and Pt‐Cu, bimetallic clusters. The atomic ratio of copper to the other metal was approximately one in all cases. The systems were chosen to investigate the effect of varying miscibility of the components on the structural features of the bimetallic clusters. At one extreme, platinum and copper are totally miscible in the bulk. At the other extreme, rhenium and copper are completely immiscible. Iridium and copper are only slightly miscible in the bulk. In the bimetallic clusters, atoms of rhenium, iridium, or platinum are all coordinated to copper atoms about as extensively as they are to atoms of their own kind. This result is particularly interesting for the Re–Cu and Ir–Cu clusters, in view of the limited miscibility of either iridium or rhenium with copper in the bulk. The surprisingly good coordination of iridium and rhenium to copper is attributed to a very high state of dispersion of these metal clusters.
25 citations
21 citations
TL;DR: In this paper, a study of the reactions of several aurate(I) compounds with silver perchlorate showed that only bis(pentachlorophenyl)aurate (I) leads to stable bimetallic [AuAg(C6Cl5)2·L]n (L = nil, tht, py, phen) complexes.
21 citations
TL;DR: Bimetallic and cluster rhodium carbonyl complexes catalyze the biphasic reduction of nitro compounds under mild conditions (using CO/5 M NaOH, C6H6 or PhCH3) and rate studies indicate the sensitivity of these complexes to low concentrations of NaOH.
Abstract: Bimetallic and cluster rhodium carbonyl complexes catalyze the biphasic reduction of nitro compounds under mild conditions (using CO/5 M NaOH, C6H6 or PhCH3). Rate studies indicate the sensitivity ...
TL;DR: Determination de la structure cristalline du complexe V[Zn(Cl) 3 (THF)(PPh 3 )] 2 •2CH 2 Cl 2 as mentioned in this paper
Abstract: Determination de la structure cristalline du complexe V[Zn(Cl) 3 (THF)(PPh 3 )] 2 •2CH 2 Cl 2
Patent•
29 Nov 1985
TL;DR: In this paper, an edge region heating device for hot rolling of metallic strip after some cooling of the strip has occurred, employs an induction heater to preferentially raise the temperature of the edge region to compensate for the faster cooling of these edge regions whereby a more uniform temperature is obtained over the cross-section of a strip when a later hot rolling operation is performed.
Abstract: An edge-region heating device for use in the hot rolling of metallic strip after some cooling of the strip has occurred, employs an induction heater to preferentially raise the temperature of the edge-regions of the strip to compensate for the faster cooling of these edge regions whereby a more uniform temperature is obtained over the cross-section of the strip when a later hot rolling operation is performed.
TL;DR: In this paper, a bimetallic isopropoxides of copper(II) of the type Cu[M(OPr-i)6]2 (M = Nb or Ta) have been synthesised by the interaction of CuCl2 (1 mol) with K[M[OPr]-6] (2 mol), which undergo facile alcohol interchange with primary alcohols such as MeOH, EtOH,n-PrOH andn-BuOH.
Abstract: Novel bimetallic alkoxides of copper(II) of the type Cu[M(OPr-i)6]2 (M = Nb or Ta) have been synthesised by the interaction of CuCl2 (1 mol) with K[M(OPr-i)6] (2 mol). These bimetallic isopropoxides undergo facile alcohol interchange with primary alcohols such as MeOH, EtOH,n-PrOH andn-BuOH. However, witht-BuOH, the reaction cannot be driven to completion even under prolonged continuous azeotropic fractionation of the liberatedi-PrOH and the final product corresponded in analysis to Cu[Ta(OPr-i)2(OBu-t)4]2.I.r., electronic and electron spin resonance spectral and magnetic susceptibility measurements indicate a distorted octahedralD4h geometry for copper(II) in these bimetallic alkoxides.
TL;DR: In this paper, bimetallic particles supported on Al2O3 were successfully redispersed in Cl 2 N 2 streams at temperatures in the range 570-670 K. Redispersion occurred via a mixed chloride of Pt and Ir which was either an adduct similar to PtAl2Cl8 or a hexameric Pt6Cl12 molecule with some Ir atoms exchanged for Pt.
TL;DR: Profound changes have been observed in the product composition of n-hexane transformations over Pt, Pt-Sn and Pt-Pb supported on alumina during the ini.
TL;DR: In this paper, the rates of benzene hydrogenation on Pl-, Pd-, Rh- and Ru-alumina (monometallic) catalysts were measured and a rate equation was derived based on these data.
Abstract: The rates of benzene hydrogenation on Pl-, Pd-, Rh- and Ru-alumina (monometallic) catalysts and the adsorption of benzene, in the presence of hydrogen, were measured and a rate equation was derived based on these data. In a bimetallic catalyst, Ru-Pd-alumina, the rate of benzene hydrogenation on ruthenium was found to be enhanced due to the migration of spilled-over hydrogen from palladium to ruthenium.
TL;DR: In this article, a simple procedure was used to produce silica-supported bimetallic Ni Pt catalysts, where during deposition-precipitation nickel reacts with the support to form nickel hydrosilicate and simultaneously platinum is adsorbed onto the reacting support.
TL;DR: A series of silica-supported rhodium-platinum catalysts containing 10−4 mol metal g−1 silica have been shown to be well dispersed by temperature-programmed reduction.
Abstract: A series of silica-supported rhodium–platinum catalysts containing 10–4 mol metal g–1 silica have been shown to be well dispersed by temperature-programmed reduction. Exchange reactions with deuterium of methane (463 K), 2,2-dimethylpropane (323 K) and n-butane (311 K) were followed using most of the catalysts in the series. Two patterns of activity against composition curve were found. For methane and 2,2-dimethylpropane, i.e. molecules containing only primary C—H bonds which cannot form α,β-diadsorbed species, platinum was as effective if not more effective than rhodium. However, for the exchange of n-butane (and also propane) rhodium was some 20–30 times more active than platinum. The extent of multiple exchange increased with rhodium content. There was some evidence for the importance of electronic effects from the variations of activity and selectivity with metal composition.
TL;DR: Alumina supported platinum-iridium bimetallic catalysts were partially agglomerated by calcining samples under oxygen for various times at elevated temperatures at elevated temperature.
TL;DR: Silica-supported Mo-Ir bimetallic catalysts exhibited much higher activity than the monometallic Mo or Ir catalyst for the hydrogenation of CO at 220-240 °C and 21 atm.
Abstract: Silica-supported Mo–Ir bimetallic catalysts exhibited much higher activity than the monometallic Mo or Ir catalyst for the hydrogenation of CO at 220–240 °C and 21 atm. Alcohols up to four carbon atoms were found to be produced over the bimetallic catalysts.
Patent•
11 Apr 1985
TL;DR: A continuous weld tube mill and a process for making steel tubes or pipes includes the steps of and apparatus for preheating a steel strip to a temperature less than its welding temperature, forming the heated steel strip into a cylindrical shape with the strip edges being positioned immediately adjacent one another, induction heating the adjacent strip edges to the welding temperature for the steel while the intermediate portion of the strip remains cooler than the weld temperature, and welding the induction heated edges together to form the tube as discussed by the authors.
Abstract: A continuous weld tube mill and a process for making steel tubes or pipes includes the steps of and apparatus for preheating a steel strip to a temperature less than its welding temperature, forming the heated steel strip into a cylindrical shape with the strip edges being positioned immediately- adjacent one another, induction heating the adjacent strip edges to the welding temperature for the steel while the intermediate portion of the strip remains cooler than the welding temperature, and welding the induction heated edges together to form the tube. In one embodiment, the weld seam is cooled until the tube temperature is substantially circumferentially uniform, and the tube is then reduced in diameter, cut to length and sized. In another embodiment, the cylindrically formed but unwelded strip is initially reduced, and thereafter the adjacent edges are induction heated and welded to form the tube, which is then cut and sized.
Patent•
15 Apr 1985TL;DR: In this paper, an activated bimetallic heterogeneous catalysts are provided comprising a catalyst support having deposited thereon a solvated dispersion of cobalt and manganese.
Abstract: Activated bimetallic heterogeneous catalysts are provided comprising a catalyst support having deposited thereon a solvated dispersion of cobalt and manganese. The manganese activates the catalytic activity of the cobalt.
TL;DR: In this paper, mixed bimetallic halide isopropoxides of zirconium and aluminium have been synthesised and characterised by elemental analyses and molecular weight determinations.
Abstract: Mixed bimetallic halide isopropoxides of zirconium and aluminium having the general formula, XnZrAl2(OPri)10-n (where n = 1 or 2; X = Cl, Br, acetylacetone anion) and [X3ZrAl(OPri)4]3·2PriOH have been synthesised and characterised by elemental analyses and molecular weight determinations. The IR and 1H NMR spectra of these newly synthesised complexes throw light on their probable structures.
Patent•
30 Mar 1985
TL;DR: In this paper, the authors proposed a hot dipping method to stick thin films to both sides of a steel strip to the required extent of sticking by supplying electric current to the steel strip, generating a magnetic field in the thickness direction of the strip, and blowing gas in the range of electromagnetic force.
Abstract: PURPOSE: To carry out hot dipping for sticking thin films to both sides of a steel strip to the required extent of sticking by supplying electric current to the steel strip passed through a hot dipping bath in the lateral direction of the strip, generating a magnetic field in the thickness direction of the strip, and blowing gas in the range of electromagnetic force. CONSTITUTION: Electric current is supplied to a steel strip 1 passed through a hot dipping bath 2 from electrodes 4 in the lateral direction of the strip 1 to heat molten metal 5 stuck to the strip 1. A magnetic field is generated in the thickness direction of the strip 1 with fixed magnets 7 to reduce the thickness of the molten metal 5 by electromagnetic force induced on the molten metal 2 side. High pressure gas is then blown from nozzles 8 in the range of the electromagnetic force to wipe off an excess of the molten metal 5. By this method, the thickness of molten metal stuck can be reduced and the passing speed of the strip can be increased. COPYRIGHT: (C)1986,JPO&Japio
TL;DR: In spite of its low intrinsic catalytic activity, gold can influence the activity and selectivity of group VIII metals, such as palladium, platinum and ruthenium as mentioned in this paper.
Abstract: In spite of its low intrinsic catalytic activity, gold can influence the activity and selectivity of group VIII metals, such as palladium, platinum and ruthenium. Gold-containing bimetallic catalysts have found important industrial applications and represent an active research area for elucidating the correlation between surface structure and catalytic activity.
TL;DR: In this article, a study by thermal techniques of the reducibility of Ni-W was conducted on both single-metal and bimetallic supported catalysts, and the results showed that Ni-w is reducible to bimetal catalysts.
Patent•
28 Oct 1985TL;DR: In this paper, the reaction of CO and H 2 to produce hydrocarbons and alcohols, catalysts prepared by depositing carbonyls of molybdenum or tungsten and rhodium or ruthenium on alumina support and decomposing and oxidizing the carbonyl to oxides of the metals on the support.
Abstract: For the reaction of CO and H 2 to produce hydrocarbons and alcohols, catalysts prepared by depositing carbonyls of molybdenum or tungsten and rhodium or ruthenium on alumina support and decomposing and oxidizing the carbonyls to oxides of the metals on the support.