Processes for an improvement to gasoline octane for long-chain paraffin feed streams
AssigneeSwift Fuels, LLC
InventorsChris D'Acosta, Jeffery Miller, Robert Hoch
Life of this patent
Estimating the term…
Abstract
Methods for making higher-octane fuel components from a feed stream of C8+ paraffins, including catalytically cracking the C8+ paraffins using a Zeolite catalyst to produce a reaction product of mid-chain paraffins and olefins and short-chain paraffins and olefins. The reaction product comprises liquid phase paraffins having an increased Octane Value over the feed stream paraffins. The reaction product further comprises a gas phase of short-chain paraffins which are separated from the liquid phase. In embodiments, the short chain olefins are hydrogenated to form mid-chain paraffins and a gas phase containing short-chain paraffins.
Claims20
A method for making a higher-octane fuel component from a feed stream containing C8-13 paraffins, comprising:
- prior to catalytic cracking, adding hydrogen to the feed stream;
- catalytically cracking C8-13 paraffins in the feed stream using a hydrogenation-metal-impregnated Zeolite catalyst at a temperature below 370° C., a pressure below 250 psig, and a flow rate of 1.5 to 3 WHSV and converting the C8+ paraffins to a reaction product comprising first C5-7 paraffins, first C4− paraffins, and C5-7 and C4− olefins converted from the C8+ paraffins,
- the C5-7 olefins and the C4− olefins being hydrogenated in the presence of the hydrogenation-metal-impregnated Zeolite catalyst to form second C5-7 paraffins and second C4-paraffins, respectively,
- the reaction product comprising a liquid phase containing product first and second C5-7 paraffins and a gas phase containing product first and second C4− paraffins;
- the liquid phase paraffins having an Octane Value that is at least 1 Octane Value higher than the Octane Value of the paraffins in the feed stream;
- and
- separating the liquid phase from the gas phase.
A method for making a higher-octane fuel component from a feed stream containing C8-13 paraffins, comprising:
- pretreating the feed stream prior to catalytic cracking, the pretreating being selected from the group consisting of thermal separation, slit stream, distillation and sulfur-reduction;
- catalytically cracking C8-13 paraffins in the feed stream using a hydrogenation-metal-impregnated Zeolite catalyst at a temperature below 370° C., a pressure below 250 psig, and a flow rate of 1.5 to 3 WHSV and converting the C8+ paraffins to a reaction product comprising first C5-7 paraffins, first C4− paraffins, and C5-7 and C4− olefins converted from the C8+ paraffins,
- the C5-7 olefins and the C4− olefins being hydrogenated in the presence of the hydrogenation-metal-impregnated Zeolite catalyst to form second C5-7 paraffins and second C4-paraffins, respectively,
- the reaction product comprising a liquid phase containing product first and second C5-7 paraffins and a gas phase containing product first and second C4− paraffins;
- the liquid phase paraffins having an Octane Value that is at least 1 Octane Value higher than the Octane Value of the paraffins in the feed stream;
- and
- separating the liquid phase from the gas phase.
A method for making a higher-octane fuel component from a feed stream containing C8+ paraffins, comprising:
- prior to catalytic cracking, adding hydrogen to the feed stream;
- pretreating the feed stream prior to catalytic cracking, the pretreating being selected from the group consisting of thermal separation, slit stream, distillation and sulfur-reduction;
- catalytically cracking C8+ paraffins in the feed stream using a Zeolite catalyst at a temperature below 370° C., a pressure below 250 psig, and a flow rate of 1.5 to 3 WHSV and converting the C8+ paraffins to a reaction product comprising first C5-7 first C4− paraffins, and C5-7 and C4− olefins converted from the C8+ paraffins, the C5-7 olefins and the C4− olefins being hydrogenated in the presence of a hydrogenation-metal-impregnated Zeolite catalyst to form second C5-7 paraffins and second C4− paraffins, respectively,
- the reaction product comprising a liquid phase containing product first and second C5-7 paraffins and a gas phase containing product first and second C4− paraffins;
- the liquid phase paraffins having an Octane Value that is at least 1 Octane Value higher than the Octane Value of the paraffins in the feed stream;
- and
- separating the liquid phase from the gas phase.
Dependencies are inferred from the claim text.