Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1984-12-19
1986-10-28
Hearn, Brian E.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208 61, 208143, 208 97, C10G 6508, C10G 6906
Patent
active
046197575
ABSTRACT:
Low-molecular weight olefins from heavy hydrocarbons are obtained with a hydrogenating pretreatment and a subsequent thermal cracking of at least a portion of the hydrogenated product. In the first stage, the polyaromatic content of a first hydrocarbon fraction high in polyaromatic compounds, e.g., a vacuum gas oil, is selectively degraded with a zeolitic hydrotreating catalyst, and in a second stage the resultant hydrocarbons are refined with a non-zeolitic hydrotreating catalyst in admixture with a second heavy hydrocarbon fraction low in polyaromatic compounds, e.g., and atmospheric gas oil. This two-stage process permits the utilization of lower operating pressures as compared to the separate treatment of the heavy hydrocarbon fractions.
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Chaudhuri O.
Hearn Brian E.
Linde Aktiengesellschaft
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