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  • Wiley-Blackwell  (3,197)
  • 1965-1969  (3,197)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 80 (1968), S. 843-844 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
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  • 2
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The acrylic esters of carnuba wax alcohols and the vinyl esters of nonhydroxy carnuba wax acids have been synthesized. The acrylic and vinyl esters have been homopolymerized and copolymerized with vinyl chloride. Acrylonitrile-acrylic ester copolymers also have been prepared. The copolymers were quite brittle when molding was attempted.
    Additional Material: 4 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 7 (1968), S. 811-811 
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 12 (1966), S. 432-437 
    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 degree of separation effected by a fractionator can be measured by a fractionation index n. The index is the equivalent number of theoretical plates, operating at total reflux, which would effect the same component separation as the fractionator.The value of the fractionation index is readily calculated from the Fenske-Underwood equation when component analyses of the feed and products are available.In the case of crude oils, the number of components is so great that resolution in the laboratory is not practicable, and the feed and products are customarily analyzed by high efficiency laboratory fractionators which give their true boiling point characteristics. In this form, the data have been broken down into short fractions which have then been treated as pseudo components in subsequent column calculations.This paper presents a method for treating the product TBP curves as algebraic functions without the necessity for breaking the feed TBP data into arbitrary short fractions. The fractionation index can be derived directly from product TBP data, or the TBP data can be calculated when the fractionation index is known.Data from performance tests on three commercial units have been analyzed. The TBP distillation analyses of the crude oils and the products enabled the fractionation indices pertaining to each section of the fractionators to be evaluated.
    Additional Material: 3 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 73-79 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Studies of the air oxidation of aquoeus sodium sulfite solutions were made in simple bubble contacting columns of 3-, 4-, and 6-in. diameter. Superficial gas rates up to 300 lb./hr.-sq.ft. were used. Contacting action is described in detail, and comparisons with air-water data show the marked influence of small, ionic bubbles. Mass transfer and dynamic gas holdup data are presented, and the former are compared with mass transfer data for bubble-cap trays.
    Additional Material: 11 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 11 (1965), S. 636-643 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Hydrogenation rates of ethylene on a copper-magnesium oxide catalyst were measured for fine catalyst particles and ½ in. spherical pellets from 60° to 160°C. Experimental effectiveness factors for this exothermic reaction system ranged from 0.2 to 25, depending upon the temperature and density of the catalyst pellets. The activation energy for the particles was 11,800 cal./g. mole (above 120°C.), while E for the pellets decreased to zero at high temperatures. Reasons for this behavior are discussed.The effective thermal conductivity of the catalyst pellets was measured as a function of density and the effective diffusivity was estimated from pore size and pore volume measurements. In principle this information and the rate data for the particles are sufficient to predict effectiveness factors for the pellets. However available prediction methods are based upon first or second order rate equations which do not fit the ethylene hydrogenation reaction.
    Additional Material: 5 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 19 (1968), S. 1043-1049 
    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: Inhibition of steel corrosion in acid media by ammonium alkylxanthogenatesThe authors have investigated the inhibiting effect of ammonium alkylxanthogenates with different alkyl radicals (C5—C16) and ammonium groups substituted in different ways (alkyl radicals C1—C10, even with formation of 6-member ring structures with the nitrogen). The acids investigated included inorganic (sulfuric, hydrochloric, amidosulfonic) and organic acids (formic, acetic, lactic, citric). The inhibitors reduce corrosion losses as well as hydrogen absorption during pickling or cleaning of steel. The effect can be attributed not only to the presence of the S and N atoms, but also to the alkyl radicals which probably form some type of hydrophobic barrier on the metal surface. As to the reduction of hydrogen absorption the effect is observed after extended periods of time only, while no essential difference has been found between inhibited and uninhibited acids as to their effect on mechanical properties.
    Notes: Untersucht wurde die Hemmwirkung von rlmrnoniumalkylxanthogenaten mit verschiedenen Alkylresten (C5-16) und verschieden substituierter Ammoniumdes gruppe (Alkylreste C1-20, auch unter Bildung von Sechsringen mit dem Stickstoff). An anorganischen Sauren wurden Schwedes fel-, Salz- und Amidosulfonsäure, an orhydrique, ganischen Säuren Ameisen-, Essig-, Milchund Citronensäure untersucht. Die inhibitoren verringern sowohl die Korrosions-verluste als auch die Wasserstoffaufnahme während des Beizens bzw. Reinigens von Stabl. Die Wirkung ist nicht nur dem S-und N-Atom zuzuschreiben, sondern auch den Alkylresten, die vielleicht auf der Metalloberfläche eine Art hydrophober Barriere bilden. Bezüglich der Verringerung der Wasserstoffaufnahme zeigt sich die Wirkung erst nach längerer Einwir-kungsdauer, während sich bezüglich der Veränderung mechanischer Eigenschaften kein wesentlicher Unterschied zwischen inhibierter und inhibitorfreier Säure festsellen läßt.
    Additional Material: 11 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 447-459 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The viscoelastic properties and thermal expansion properties of bisphenol A polycarbonate have been studied in the neighborhood of the major glass transition temperature. A discussion is given of the possible relation of these properties to the unusual impact resistance of this polymer in the glassy state.
    Additional Material: 9 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 1579-1584 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: In a previous paper it was shown that the vulcanization obtained with ethylene-propylene-diene terpolymer is equivalent or superior to that obtained with ethylene-propylene copolymer when a peroxide-dimethacrylate coagent cure system was used. In order to determine the effect of the unsaturation on the physical properties in the terpolymer, the terpolymer had been hydrogenated to remove the double bonds. Infrared spectra and bromination were used to check the extent of hydrogenation. Tensile strength, Shore A hardness, per cent elongation, and modulus indicated no decrease in vulcanization efficiency after hydrogenation. The data show that the unsaturation in the terpolymer does not contribute to the vulcanization cure with the peroxide-dimethacrylate coagent curing system.
    Additional Material: 1 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 10 (1966), S. 429-435 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Polyacrylonitrile sheet cast by a novel method described in Part I is clear, colorless, chemically resistant, brittle, and rather weak. It undergoes irreversible thermal changes above about 80°C., but if heated quickly, it can be oriented to give greater strength parallel to the direction of orientation. Some improvement in strength can be achieved by the use of fibrous fillers. Certain copolymers are stronger than the homopolymer but have lower softening temperatures.
    Additional Material: 1 Ill.
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