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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 67 (1995), S. 1584-1594 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In the series of environmental protection measures avoidance-utilisation-disposal the greatest priority in the chemical industry is given to the first, particularly since it is the chemical reaction which predetermines the nature and extent of subsequent work-up steps and the environmental burden. This reactor-integrated environmental protection leads to a process reappraisal which is divided into searches for alternative synthetic routes, reactants, reaction media, and catalysts. However, one of the principal tasks concerns reexamination of the thermodynamics and kinetics, not only to ensure optimised concentration and temperature control but also to examine the possibility of integrating separation operations during the course of reaction with the aim of shifting equilibria.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mixing at the End of the 20th Century In the light of the rapid and highly successful development of mixing technology during the past 50 years the author presents a terse and critical assessment focussing on open problems and their possible solutions. One of the shortcomings encountered in practice lies in the failure to distinguish between micro- and macro-mixing as fundamental mixing processes. The other concerns the failures attributed to dimensional analysis which actually originate in inappropriate measuring and application techniques.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 71 (1999), S. 1170-1174 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 70 (1998), S. 1158-1159 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 71 (1999), S. 1046-1047 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Es wurde die Rührleistung eines Scheibenrührers herkömmlicher Bauart beim Dispergieren des von unten zugeführten Luftstromes in Abhängigkeit von kinematischen, geometrischen und stofflichen Parametern untersucht. Die Versuchsergebnisse wurden im Sinne der Ähnlichkeitslehre konsequent ausgewertet und führen zu Beziehungen, die eine genaue Vorausberechnung der Rührleistung in begasten Flüssigkeiten gestatten. Danach ist im Bereich Re 〉 104 und Fr ≥ 0,65 die Leistungs-Charakteristik ausschließlich durch eine Funktion der Newton-Zahl von der Durchsatzkennzahl Q gegeben, während im Bereich 103 〈 Re 〈 104 noch eine Zusatzfunktion f(Q, Re) hinzutritt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 50 (1978), S. 715-715 
    ISSN: 0009-286X
    Keywords: Schlitzstrahler ; Blasenkoaleszenz ; Dispergierung ; Sorptions-Charakteristik ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 53 (1981), S. 600-606 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Description / Table of Contents: New approaches in flotational processing and waste water treatment in the chemical industry. Flotation has not yet become universally accepted in the chemical industry as a separation technique for the solids/liquid system. This article attempts to discover the reason why. It also presents possibilities enhancing the attractiveness of the flotation technique for recovery of materials and waste water purification in the chemical industry. A brief indication of the phenomena exploited by the flotation technique is followed by a discussion of chemical engineering aspects of this technique in ore and coal flotation and in mechanical waste water purification. A flotation cell without stirrer is presented, as has been designed specifically for the chemical industry. In conclusion, some flotation tasks performed with a laboratory version of this type of cell are presented and discussed. They show that the flotation technique can be a favourable alternative to classical separation techniques in many solids/liquid and liquid/liquid separation tasks, and should therefore be considered in future for appropriate separation problems (particle size ca. 100 μm, solids content ≤ 20 g/l).
    Notes: Die Flotation hat sich in der chemischen Industrie als ein Trennverfahren für das System fest/flüssig bisher noch nicht durchgesetzt. In der vorliegenden Arbeit wird versucht, dafür eine Erklärung zu finden. Gleichzeitig werden Möglichkeiten aufgezeigt, die die Flotationstechnik zur Werkstoff-Rückgewinnung und Abwasserreinigung in der chemischen Industrie attraktiv machen könnten. Nach Hinweisen auf die Phänomene, deren sich die Flotationstechnik bedient, werden die verfahrenstechnischen Aspekte dieser Technik bei der Erzund Kohleflotation bzw. bei der mechanischen Abwasserreinigung besprochen. Es wird eine rührerlose Flotationszelle vorgestellt, die speziell für die Belange der chemischen Industrie entwickelt worden ist. Abschließend werden einige Flotationsaufgaben, die mit einer Laborausführung dieses Zellentyps durchgeführt worden sind, vorgestellt und besprochen. Sie zeigen, daß die Flotationstechnik bei vielen Trennaufgaben in den Stoffsystemen fest/flüssig und flüssig/flüssig eine günstige Alternative zu den klassischen Trennverfahren sein kann und sie daher künftig bei entsprechenden Trennproblemen (Teilchengröße ≤ 100 μm, Feststoffgehalt ≤ 20 g/l) in Erwägung gezogen werden sollte.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 54 (1982), S. 939-952 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Chemical engineering of aerobic waste water treatment - developments and trends. The present article deals with chemical engineering problems encountered in biological waste water treatment, as seen in research reports published during the last 5 to 10 years. It is seen that important advances in our biological and engineering knowledge of the biological degradation of organic wastes, relating to residence time distribution, concentration of biomass, and the temperature in the activation process have not been given sufficiently consistent attention in practice. Controversial views and possible solutions are indicated. Immobilization (especially with activated charcoal as carrier) offers certain advantages for raising the concentration of biomass in the activation space, this also facilitating separation of the biomass from the purified water. Flotation could offer an alternative. Disposal of the excess activated sludge is nowadays accomplished largely by anaerobic fermentation (bioconversion); the engineering of this step was developed in the 1930's and should be updated at the earliest possible opportunity. This would enhance the appeal of the process because the energetic potential of the biomass could then be fully utilized.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
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