ISOLATION AND CHARACTERIZATION OF PARAFFINIC COMPONENTS FROM VENEZUELAN ASPHALTS EFFECTS OF PARAFFIN DOPANTS ON RHEOLOGICAL PROPERTIES OF SOME ASPHALTS |
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| Authors: | Lante Carbognani Daniela Duarte Jose Rosales Julio Villalobos |
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| Affiliation: | 1. Analysis &2. Evaluation Department , Intevep,S. A. Research and Technological Center of Petroleos de Venezuela , P.O.Box 76343, Caracas, 1070A, Venezuela;3. Chemical Engineering Department , Simon Bolivar University , Sartenejas, Caracas, Venezuela;4. Petroleum Products Department , Intevep,S. A. Research and Technological Center of Petroleos de Venezuela , P.O.Box 76343, Caracas, 1070A, Venezuela |
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| Abstract: | ABSTRACT Paraffinic concentrates were isolated from a couple of Venezuelan asphalts, one paraffinic in nature and the other naphteno-aromatic Multigram scale isolation required two steps. The first one was the separation of neutral hydrocarbons by means of soxhlet extractors filled with clay and extracted with hot cyclohexane. The second step comprised the cryogenic wax crystallization and filtration from neutral hydrocarbons diluted in methyl ethyl ketone, brought to -10°C. Typical operations comprised 800g of asphalt and recovery of 20g of waxes. |
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