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  • Chemistry  (29)
  • 1955-1959  (29)
Document type
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamic properties of l-butene (1955)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 1 (1955), S. 210-214 
    Details
    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 thermodynamic properties of 1-butene have been calculated over a temperature range of 32° to 480°F. and at pressures up to 1,000 lb./sq. in. abs. These properties were determined from vapor-pressure, volumetric, heat-capacity, and latent-heat of vaporization data through the application of rigorous thermodynamic relationships. The calculated data have been found to be internally consistent. The enthalpy values are believed to be accurate to within ±0.5 B.t.u./lb. and the entropy values to ±0.0005 B.t.u./(lb.) (°R.).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690010213
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Evaluation of the heat requirements in batch distillation operations (1957)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 3 (1957), S. 391-394 
    Details
    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 rigorous method is presented for the evaluation of the heat requirements in binary batch fractionations which involve negligible column hold up. The method, in which the additional variables of the discontinuous process are taken into account, is a modification of the methods of Ponchon and Savarit for continuous operation. Two examples, one for a fractionation in which the composition of the product is constant and the other in which the reflux ratio is constant, are given as illustrations of the method.The application of the method permits more accurate evaluation of reboiler and condenser heat loads and, in turn, better design.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690030320
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Thermodynamic properties of n-hexane (1956)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 514-517 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Thermodynamic properties of n-hexane have been calculated over a temperature range of 32° to 540°F. and up to a pressure of 600 lb./sq. in. abs. These properties were determined from vapor pressure, volumetric, heat capacity, and latent heat of vaporization data through the application of rigorous thermodynamic relationships. The calculated data have been found to be internally consistent. The enthalpy values are believed to be accurate to within 0.5 B.t.u./lb. and the entropy values to 0.0005 B.t.u./(lb.)(°R.).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690020417
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Theorem of corresponding states applied to saturated liquids and vapors (1956)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 354-359 
    Details
    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 existence of a single generalized compressibility-factor relationship for univariant systems has long been denied because reduced variables do not provide a generalized vapor-pressure relationship. The present study demonstrates that a saturation curve depends on the ability of the theorem of corresponding states to correlate the reduced temperature as a function of reduced, pressure and the critical compressibility factor. Saturation curves for both the liquid and the vapor phases are established from compressibility data on a variety of systems, substantiating this conclusion.The compressibility factors of saturated mixtures are correlated with pseudoreduced properties based upon Kay's pseudocritical concept. The results indicate that the compressibility factors of saturated liquid mixtures can be predicted with reasonable precision over the entire two-phase region. For pseudoreduced isotherms of unity and above, the same isotherms apply to both phases and are approximately consistent with published compressibility charts for pure gases.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690020312
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Differential heats of condensation and enthalpies of saturated liquid hydrocarbon mixtures (1956)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 389-392 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: By use of saturated-vapor enthalpies determined by accepted procedures in conjunction with differential latent heats of condensation, the saturated-liquid enthalpies are established for the system methane-ethane at 200, 400, and 600 lb./sq. in. abs. and for the system ethane-n-butane and propane-n-butane at the two lower pressures. Where comparison is possible, the liquid-enthalpy values obtained by this method are in general agreement with those previously determined by Edmister and Canjar. The procedure used is thermodynamically rigorous and may be applied to any binary mixture, provided the Benedict-Rubin-Webb equation of state is valid in the vapor phase and P-V-T-x data are available.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690020319
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  • 6
    Electronic Resource
    Electronic Resource
    Thermodynamic properties of acetylene (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 17-19 
    Details
    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 derived thermodynamic properties of acetylene have been determined over a temperature range of 32 to 500°F. and up to pressures of 2,000 lb./sq. in. abs. The data were calculated from vapor pressure, volumetric, and heat-capacity data by the use of rigorous thermodynamic relationships. The calculated data were found to be internally consistent. The enthalpy values are believed to be accurate within ±1.0 B.t.u./lb. and the entropy values to ±0.001 B.t.u./(lb.)(°R.).
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050105
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  • 7
    Electronic Resource
    Electronic Resource
    Kristallstruktur des Natriumamids (1956)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 284 (1956), S. 73-82 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Einkristallaufnahmen von Natriumamid und ihre Auswertung durch Patterson- und Fourier-Synthese haben zu folgenden Ergebnissen geführt:Natriumamid kristallisiert rhombisch mit den Gitterkonstantena = 8,044 b = 8,911 c = 10,406 kX.Raumgruppe D242h mit 16 Formeleinheiten im Elementarkörper. Es sind folgende Punktlagen besetzt:Na in (16 g) mit z = 0,142NH2 in (16 e) mit x = 0,233.Die NH2-Ionen bilden eine stark deformierte, kubisch dichte Anordnung, die Natrium-Ionen befinden sich in Tetraederlücken.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19562840110
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Chemie der Metallcarbonyle in flüssigem Ammoniak. Über die Reaktionen der Hexacarbonyle der Chromgruppe mit Alkali- und Erdalkalimetallen (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 291 (1957), S. 122-130 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In Analogie zu der früher(1) beschriebenen Umsetzung von Fe(CO)5 mit Alkalimetallen im Ammonosystem, die zur Bildung von Tetracarbonylferrat(-II) führt, Fe(CO)6 + 2 Na → [Fe(CO)4]Na2 + CO, lassen sich auch die Hexacarbonyle der Chromgruppe zu tiefgelben edelgaskonfigurierten Pentacarbonylmetallaten(-II) reduzieren: Me(CO)6 + 2 Na → [Me(CO)5]Na2 + CO (Me = Cr, Mo, W).Diese besitzen  -  wie das Tetracarbonylferrat(7hyphen;II)  -  ein Molekül CO weniger als die betreffenden monomeren Metallcarbonyle.Die Reaktionen werden durch Bestimmung der verbrauchten Alkalimetalle und der bei den Umsetzungen freiwerdenden Gase quantitativ untersucht und die Eigenschaften der entstandenen Verbindungen beschrieben.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572910113
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  • 9
    Electronic Resource
    Electronic Resource
    Beiträge zur Chemie des Schwefels. XXXVII. Über die Darstellung und Eigenschaften der Chlorsulfane S3Cl2, S4Cl2, S5Cl2 und S6Cl2 (1957)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 290 (1957), S. 303-319 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Wie bereits mitgeteilt, kann man die Kondensationsreaktion zwischen Sulfanen und Chlorsulfanen durch Anwendung eines sehr großen Überschusses des einen Partners unter geeigneten Bedingungen so lenken, daß eine Sekundärreaktion des gebildeten Kondensationsproduktes weitgehend vermieden wird und dadurch selektiv nur die nach der Primärreaktion: zu erwartende Verbindung entsteht.Im folgenden wird gezeigt, daß dieses Reaktionsprinzip zur Gewinnung formelreiner Chlorsulfane allgemein anwendbar ist. So erhält man durch Reaktion der Sulfane H2S, H2S2, H2S3 und H2S4 mit SCl2 im großen Überschuß bei etwa -80°C und langsamer Reaktionsführung über die bereits seit langem bekannten Chlorschwefelverbindungen SCl2 und S2Cl2 hinaus weitere definierte Stoffe. Im einzelnen wird die Darstellung der formelreinen Substanzen S3Cl2, S4Cl2, S5Cl2 und S6Cl2 beschrieben. Die RAMAN-Spektren sowie das streng gesetzmäßige Anwachsen der Werte für das Molvolumen, die Molrefraktion und die Viskosität zeigen, daß es sich um wohldefinierte und gut charakterisierte Einzelglieder einer homologen Reihe kettenförmiger Verbindungen handelt.Durch Umsetzung von Chlorsulfanen nach folgenden Gleichungen: gelangt man in glatter Reaktion und quantitativer Ausbeute zu z. T. bereits auf anderem Wege gewonnenen Sulfanderivaten. Dadurch ist die Konstitution und die Individualität der Verbindungen auch auf chemischem Wege sichergestellt.Alle Chlorsulfane sind relativ stabil. Sie lassen sich bei -80° unbegrenzt, bei Zimmertemperatur wochenlang bei nur geringer Zersetzung aufbewahren. S3Cl2 ist im Hochvakuum unzersetzt destillierbar, während sich S4Cl2 bei der Destillation bereits teilweise zersetzt. Die Substanzen sind im Laboratoriumsmaßstab in größeren Mengen erhältlich. Ihre Anwendungsmöglichkeit in der anorganisch- und organisch-präparativen Chemie zum Aufbau neuer, langkettiger Schwefelverbindungen dürfte sehr vielseitig und interessant sein.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19572900511
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  • 10
    Electronic Resource
    Electronic Resource
    Notiz über die Permeation des Wasserstoffs durch palladiumbedecktes Quarzglas (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 81-83 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The permeation of hydrogen through quartz glass coated by a film of palladium is in the temperature range from 400 to 700° C 1.44 times greater than through pure quartz glass. Above 700° C, this effect disappears because of recrystallization of Pd. The Arrhenius-equation of permeation is discussed.
    Notes: Die Permeation des Wasserstoffs durch Quarzglas, dem eine Palladiumschicht aufgebrannt ist, zeigt zwischen 400 und 700° C eine Erhöhung um den konstanten Faktor 1,44 und damit eine Vergrößerung des temperaturunabhängigen Häufigkeitsfaktors gegenüber reinem Quarzglas, aber keine Änderung der Aktivierungsenergie. Oberhalb 700°C geht der Effekt durch Rekristallisation der mit Wasserstoff beladenen Palladiumschicht verloren.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000108
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