Deasphalting and gasification - A new approach for converting heavy crudes into petrochemicals
Conference
·
OSTI ID:229595
- Maraven, S.A., Caracas (Venezuela)
The huge amount of heavy and extra-heavy crudes of Maraven has led our company to develop a medium/long term strategic plan for disposition and optimum use of these resources. One of these crudes, Boscan, has been used only in asphalt manufacturing and in some deep conversion refineries (with volumetric limits, 10-15 vol% as coker feed), due to its low quality for fuel manufacturing (10.2{degrees}API, 5.4 wt% sulphur, 1122 ppm vanadium) and high residuum yield (78% LV of 700{degrees}F+ residue). In 1992, Maraven undertook a series of studies that brought about the definition of an industrial complex to convert Boscan extra-heavy crude oil to higher value distillates and chemical products. The combination of Rose Solvent Deasphalting of the Boscan atmospheric residue with the gasification of the deasphalting raffinate produces 79% yield of high quality liquid distillates and clean syngas for chemical synthesis. Under this new approach syngas is used to produce 1600 tons/day of grade AA (99.9 wt%) methanol: 1330 tons/day are available for export and 270 tons/day are dedicated for the production of 500 tons/day of acetic acid. The remaining syngas is used to supply the hydrogen requirements of the Boscan extra heavy crude upgrading complex and for power generation. The technical feasibility of this route, based on commercially proven processes together with adequate economics for this type of business, will allow the conversion of extra-heavy crude oil into higher value distillates and chemical products.
- OSTI ID:
- 229595
- Report Number(s):
- CONF-9502114--Vol.2
- Country of Publication:
- United States
- Language:
- English
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