Selective Asphaltene Precipitation from Hydroconverted Bottoms
| Autor: | Justin Boysen, Joseph F. Rovani, Nihar Phalak, Carl Mesters, Frans G. Van Den Berg, John F. Schabron, Jeramie J. Adams |
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| Rok vydání: | 2016 |
| Předmět: |
Chromatography
General Chemical Engineering Energy Engineering and Power Technology 02 engineering and technology Coke 010402 general chemistry 01 natural sciences 0104 chemical sciences Solvent chemistry.chemical_compound Fuel Technology 020401 chemical engineering chemistry Chemical engineering Phase (matter) Asphaltene precipitation 0204 chemical engineering Acetonitrile Layer (electronics) Dissolution Asphaltene |
| Zdroj: | Energy & Fuels. 30:9658-9670 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.6b02008 |
| Popis: | A novel method is described that selectively precipitates the least soluble asphaltenic material from hydroconverted bottoms (HCB) using a dual immiscible solvent approach. This approach separates asphaltenes from the deasphalted (DAO)/precipitant layer by adding acetonitrile (CH3CN) as a second immiscible phase. The three phase system precipitates asphaltenes to the bottom which becomes separated from the top DAO/precipitant layer by a middle CH3CN layer. Due to some CH3CN dissolving in the DAO/precipitant layer, the solvent parameter (and possibly other chromatographic or specific interactions) of the precipitating medium is increased causing less overall asphaltenes to be precipitated, but more of the least soluble precoke-like asphaltenes are selectively precipitated. This treatment produces DAO that is more thermally stable with regard to coke formation compared to DAO generated using only the aliphatic precipitant which precipitates out more asphaltenes. The immiscible CH3CN layer reaches a steady s... |
| Databáze: | OpenAIRE |
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