968 resultados para Gums and resins


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Bibliograhy: p. [169]-174.

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Cover title: Infrared spectra of plastics and resins.

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"Based upon a college course in the chemistry of plastics and resins offered at Boston University by one of the authors."--Pref.

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Bibliography: pages 87-88.

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Includes bibliography.

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Includes bibliographical references (p. 10).

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Includes bibliographical references and index.

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Mode of access: Internet.

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Experimental data are presented to show the influence of asphaltenes and resins on the stability and demulsification of emulsions. It was found that emulsion stability was related to the concentrations of the asphaltene and resin in the crude oil, and the state of dispersion of the asphaltenes and resins (molecular vs colloidal) was critical to the strength or rigidity of interfacial films and hence to the stability of the emulsions. Based on this research, a possible emulsion minimization approach in refineries, which can be implemented utilizing microwave radiation, is also suggested. Comparing with conventional heating, microwave radiation can enhance the demulsification rate by an order of magnitude. The demulsification efficiency reaches 100% in a very short time under microwave radiation. (C) 2003 Elsevier Inc. All rights reserved.