Peptization of asphaltene by various oil soluble amphiphiles
✍ Scribed by Gaspar González; Antonieta Middea
- Publisher
- Elsevier Science
- Year
- 1991
- Weight
- 587 KB
- Volume
- 52
- Category
- Article
- ISSN
- 0166-6622
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## Abstract Colloidal PbS quantum dots (QDs) with tunable photoemission throughout the near‐infrared (NIR) region (ca. 750–1000 nm) were synthesized by a two‐phase approach. Here, oil‐soluble lead oleate formed by a reaction of lead acetate and oleic acid (OA, the capping agent) in __n__‐decane at
H and 13C n.m.r. spectra of asphaltenes separated from a heavy crude oil using n-pentane at different temperatures were measured. Average molecular parameters and hypothetical structural models for these asphaltenes were proposed using n.m.r. measurements, calculated molecular weight of unit sheets