Upgrading Fischer-Tropsch olefins
AssigneeMobil Oil Corporation
InventorsFritz A. Smith, Samuel A. Tabak
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Abstract
A process for converting olefinic feedstock, such as synthol olefinic liquid product of Fischer-Tropsch synthesis, to distillate hydrocarbons comprising the steps of contacting the feedstock at elevated temperature and pressure with acid zeolite conversion catalyst to oligomerize olefins and convert oxygenated hydrocarbons contained in said light oil at temperatures up to 325.degree. C. and in the presence of H.sub.2, thereby providing an effluent containing heavy distillate range hydrocarbon, light gas and byproduct water.
Claims13
A continuous process for converting a feedstock mixture comprising a major amount of lower olefins and a minor amount of oxygenated hydrocarbons to higher hydrocarbons including distillate product comprising:
- contacting the feedstock in the presence of about 1 to 50 mole percent hydrogen with a shape selective medium pore oligomerization acid zeolite catalyst under reaction conditions at elevated temperature up to about 325.degree. C. in a pressurized reactor zone to convert olefins to heavier hydrocarbons.
A process for converting synthol olefinic liquid product of Fischer-Tropsch synthesis to distillate hydrocarbons comprising the steps of
- contacting said synthol product at temperature of about 230.degree. C. to 325.degree. C. under pressure with acid zeolite conversion catalyst to oligomerize olefins and convert oxygenated hydrocarbons contained in said synthol liquid product, thereby providing an effluent containing heavy distillate range hydrocarbon, light gas and byproduct water;
- co-feeding with said synthol product an amount of hydrogen gas in the range of about 1 to 50 mole percent and sufficient to inhibit coke formation during conversion;
- and
- separating said effluent to recover a heavy distillate-rich product stream, light hydrocarbon-rich vapor containing hydrogen and byproduct water.
A continuous process for converting a feedstock mixture comprising a major amount of C.sub.3 -C.sub.6 olefins and a minor amount of oxygenated hydrocarbons to higher hydrocarbons including C.sub.10 -C.sub.20 distillate product comprising:
- contacting the feedstock in the presence of hydrogen with a shape selective acidic pentasil zeolite oligomerization catalyst under reaction conditions at a temperature of about 230.degree. C. to 325.degree. C. in a pressurized reactor zone to convert olefins to heavier hydrocarbons,
- wherein the hydrogen is co-fed in an amount comprising about 1 to 50 mole perecent of the feedstock.
Dependencies are inferred from the claim text.