US 12,264,287 B2
Pentane-enriched hydrocarbons to transportation fuel
Chengtian Wu, Bartlesville, OK (US); Jonathan Marda, Baton Route, LA (US); Karthikeyan Marimuthu, Bartlesville, OK (US); Dhananjay Ghonasgi, Bartlesville, OK (US); and Jianhua Yao, Bartlesville, OK (US)
Assigned to Phillips 66 Company, Houston, TX (US)
Filed by PHILLIPS 66 COMPANY, Houston, TX (US)
Filed on May 9, 2023, as Appl. No. 18/314,613.
Claims priority of provisional application 63/342,344, filed on May 16, 2022.
Claims priority of provisional application 63/342,352, filed on May 16, 2022.
Prior Publication US 2023/0365878 A1, Nov. 16, 2023
Int. Cl. C10G 67/16 (2006.01); C10G 35/06 (2006.01); C10G 50/00 (2006.01)
CPC C10G 67/16 (2013.01) [C10G 35/065 (2013.01); C10G 50/00 (2013.01); C10G 2300/1081 (2013.01); C10G 2300/30 (2013.01); C10G 2400/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for converting a hydrocarbon feed stream comprising pentanes to produce a liquid transportation fuel blend stock, comprising:
a) providing a natural gas liquids feed stream comprising C2-C6 hydrocarbons;
b) separating the natural gas liquids feed stream in a fractionator to produce multiple fractions, each fraction comprising a light hydrocarbon containing from 2 to 6 carbon atoms, wherein one of the fractions is a raw natural gasoline fraction comprising at least 70 wt % of hydrocarbons containing five or six carbon atoms, wherein the raw natural gasoline fraction has a Reid vapor pressure that exceeds 12 psi;
c) separating the natural gasoline fraction to produce an isopentane fraction comprising at least 60 mol % of the isopentane in the raw natural gasoline fraction and a natural gasoline product predominantly comprising hydrocarbons containing 5 or 6 carbon atoms, wherein the natural gasoline product has a Reid vapor pressure that is less than 12 psi;
d) splitting a refinery-derived naphtha stream comprising C4-C10 hydrocarbons to produce a C5 olefins fraction that is enriched in olefins containing five carbon atoms, and a low olefin naphtha stream that is depleted in C5 olefins and meets specifications for a blend component of gasoline;
e) contacting the C5 olefins fraction with an oligomerization catalyst at conditions of temperature and pressure that facilitate the conversion of the C5 olefins fraction to produce an oligomerization effluent comprising an increased percentage of aliphatic hydrocarbons (in wt. %) containing from six to ten carbon atoms, relative to the aliphatic hydrocarbons content (in wt. %) of the C5 olefins fraction;
f) combining the oligomerization effluent, the isopentane fraction of c) and the low olefin naphtha stream of d) in a ratio that produces a hydrocarbon product that meets regulatory specifications for gasoline, or a blend component thereof.