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  • Chemistry  (72)
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  • Wiley-Blackwell  (72)
  • American Chemical Society
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  • Wiley-Blackwell  (72)
  • American Chemical Society
  • Blackwell Publishing Ltd
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  • 1
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Data correlations are presented for equilibrium adsorption of pure hydrocarbon vapors and their mixtures. The systems represented are C1 to C4 hydrocarbons (olefins and paraffins) on gas-adsorbent grades of activated charcoal. The mixture data are limited to binary and ternary gas systems. The adsorption conditions represented among the correlated data cover ranges of 77° to 175°F. temperature and 0 to 100 lb./sq. in. gauge. With the use of empirical adsorption constants, a common correlation of specific adsorption capacity for the various hydrocarbons is presented; it applies for either pure components or their mixtures. A correlation is given also for adsorption relative volatilities. Approximate adsorption heats, a limited amount of high-temperature steam adsorption data, and sample calculations on applications of the correlations are included. The prediction methods are recommended for adsorption conditions up to 250°F. and 250 lb/sq. in. gauge for the particular systems studied.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 173-176 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The attractive nuclear properties of zirconium make it a highly desirable core material for sodium-cooled reactors. The elevated temperature strength while low is sufficient for certain applications. Development of higher strength alloys is underway. Sodium in itself is completely compatible with zirconium; however, the nonmetallic contaminants, namely oxygen, hydrogen, and nitrogen, can effect serious damage. The primary problem in the use of zirconium in a sodium system, then, lies in controlling these impurities in the sodium.
    Additional Material: 5 Ill.
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  • 3
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
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  • 4
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 705-708 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The results of the corrosion tests of cathodically protected iron specimens in aired and not aired soils were published in article I. This paper is a report on further corrosion tests on cathodically protected iron specimens in soils which have been carried out to explain the influence of the soil water to soil air ratio. The corrosion of the protected specimens decreased when the soil had reached its water saturation limit as it should have been expected. On basis of these investigations you could get quantitative and reliable datas of the effectiveness of the cathodic protection on the corrosion of the cathodic protection on the corrosion of the protected metal in dependence of the soil water to soil air ratio which characterizes the aggressiveness of soils. The results of these investigations could be used also to put up general corrosion charts for materials to be protected by cathodic protection.
    Notes: Nachdem über die Ergebnisse der mit kathodisch geschützten Eisenproben in belüfteten und unbelüfteten Böden durchgeführten Korrosionsversuche bereits berichtet wurde (Mitteilung I), wird in der vorliegenden Arbeit über weitere Korrosionsversuche berichtet, die mit kathodisch geschütztem Eisen im Erdreich zur Klärung des Einflusses des W-Bd-Verhältnisses durchgeführt wurden. Wie zu erwarten war, wurde der Angriff der geschützten Probe verringert, wenn der Boden die Sättigungsgrenze an Wasser erreicht hatte. Auf Grund der durchgeführten Versuche können quantitative, zuverlässige Aussagen über die Wirkung des kathodischen Schutzes auf den Korrosionsablauf des geschützten Metalls in Abhängigkeit vom W-Bd-Verhältniswert, der für die Aggressivität des Bodens maßgebend ist, gemacht und zur Aufstellung allgemeiner Korrosionsschemen für einen kathodisch zu schützenden Werkstoff herangezogen werden.
    Additional Material: 7 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 7 (1956), S. 138-139 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The Coefficient of Temperature and the Heat of Activation of the Corrosion-Reaction of Iron in SoilThe corrosion of soft iron in different soils can be described in dependance of the soil water to soil air ratio by means of the coefficients of temperature and the heats of activation of these corrosion reactions of the iron.The mean coeffizient of temperature in soils containing 20 per cent of water was about 1,92 and in water saturated soils it was about 1.7. The heats of activation of the corrosion of iron in water saturated soils (clay, loan, river sand, infusoria) amount to 9-10 kcal, in those containing 20 per cent of water 12-18 kcal.
    Notes: Es wird gezeigt, daß man die Korrosion von Weicheisen in verschiedenen Böden in Abhängigkeit vom „Bodenwasser-Boden-luft-Verhältniß an Hand der Temperatur-koeffizienten und Aktivierungsenergien der Korrosions-Reaktionen des Eisens verfolgen kann.Der mittlere Temperaturkoeffizient betrug in Böden mit einem Wassergehalt von 20% etwa 1,92 und in mit Wasser gesättigten Böden etwa, 1,7. Die AKtivierungsenergien der Eisenkorrosion in mit Wasser gesättigten Böden (Ton, Lehm, Flußsand, Infusoria) betrugen 9 bis 10 kcal und in solchen mit 20% Wasser 12 bis 18 kcal.
    Additional Material: 2 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 26-33 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The rates of nitration of benzene by nitric acid in mixed acid to produce mononitrobenzene have been measured in well-emulsified reaction mixtures in the temperature range from 34° to 54°C. The acid-phase compositions ranged from 1.6 mole % nitric acid and 27 mole % sulfuric acid to 35 mole % nitric acid and zero % sulfuric acid; the organicphase composition ranged from 4 to 95 mole % benzene, and the relative extent of the acid and organic phases was varied from 25 to 80 volume % acid phase.The reaction rate based on the total volume of the reacting mixture is shown to be a function of the phase compositions, temperature, and volume % of acid phase.
    Additional Material: 12 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 18-25 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A method of estimating the true conditions of operation of a bubble-cap tray is presented. Intermediate between the Murphree and the Lewis methods, which represent the extremes of actual operation, this method involves the use of a correlation to determine the degree of liquid mixing on the tray and the use of new relations between the Murphree vapor efficiency, the Lewis case I efficiency, and the true local efficiency. For the last, partial liquid mixing is taken into account.Data were obtained on an 18-in. O.D. three-tray bubble-cap tower containing ten 3-in. bubble caps a tray. Partial liquid mixing was correlated for changes in vapor and liquid rates, pressure, temperature, and weir height for the system ethylene dichloride-toluene.Efficiency data on acetone-water, ethanol-water, and ethylene dichloride-toluene showed the following effects: (1) low concentration of lwo boiler usually, but not always, resulted in low true local efficiencies, always with high Murphree efficiencies; (2) vapor velocity effects are more intimately connected with slot velocity than superficial velocity (and hence entrainment); (3) raising the pressure gives higher efficiencies; (4) an increase in liquid depth increases the true local efficiency but may have no effect on the Murphree efficiency.
    Additional Material: 15 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 46-54 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The hydrogenation of carbon monoxide and carbon dioxide on various steel catalysts was studied in the temperature range of 800° to 1,300°F. and at pressures from 5 to 30 atm. The feed gases (3.75 to 20 SCFH) were passed over a catalyst bed of 1/8-in. steel balls supported in a brass-lined reactor 0.81 in. in diam. The percentage of carbon oxides in the feed was 30% in the runs using a H2—CO2 feed and varied from 15 to 38% in the runs with a H2—CO feed. The effects of temperature, pressure, feed composition, space velocity, and mass velocity were studied. Carbon deposition did not affect the activity of the catalyst and could be removed readily.
    Additional Material: 18 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 55-58 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The physical processes are discussed by which a fluid is displaced from a porous medium during steady state viscous flow by another fluid of the same density and viscosity under conditions of complete miscibility of the two fluids. The displacement occurs on a microscopic scale as a result of combined convective and diffusional mixing. The length of the zone of mixing which comprises the displacement front is predicted to be dependent upon the rate of flow, the diffusion coefficient for the two-fluid system, the characteristics of the pore geometry, and the distance the front has traversed at the time of its observation.Experimental data are presented for the displacement of benzene by ethyl n-butyrate at several rates of flow from packed sand columns. These data show that the length of the frontal mixing zone after a prescribed distance of flow is greater at the higher rates of flow. The postulated dependence of the length of the front upon the diffusion coefficient and the pore geometry has not yet been investigated.
    Additional Material: 4 Ill.
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