초록 ▼

A process for converting synthol light oil product of Fischer-Tropsch synthesis to heavy distillate comprising the steps of contacting the light oil at elevated temperature and pressure with acid zeolite conversion catalyst to oligomerize olefins and convert oxygenated hydrocarbons contained in the

A process for converting synthol light oil product of Fischer-Tropsch synthesis to heavy distillate comprising the steps of contacting the light oil at elevated temperature and pressure with acid zeolite conversion catalyst to oligomerize olefins and convert oxygenated hydrocarbons contained in the light oil thereby providing an effluent containing light heavy distillate range hydrocarbon, hydrocarbon vapor and byproduct water; flashing and separating the effluent to recover a heavy distillate-rich liquid phase and a light hydrocarbon-rich vapor phase containing byproduct water; condensing the vapor phase to provide a liquid hydrocarbon recycle stream; removing byproduct water from the recycle stream; combining the light oil with the pressurized recycle stream as heat sink to prevent excessive reaction temperature during catalytic conversion.

대표청구항 ▼

A continuous process for converting a feedstock mixture comprising a major amount of C5-C6 olefins and a minor amount of oxygenated hydrocarbons to higher hydrocarbons comprising distillate product comprising: combining olefinic feedstock with a pressurized liquid recycle stream comprising a major f

A continuous process for converting a feedstock mixture comprising a major amount of C5-C6 olefins and a minor amount of oxygenated hydrocarbons to higher hydrocarbons comprising distillate product comprising: combining olefinic feedstock with a pressurized liquid recycle stream comprising a major fraction of C5+olefins; contacting the diluted feedstock with a shape selective medium pore oligomerization catalyst under reaction conditions at elevated temperature in a pressurized reactor zone to convert olefins to heavier hydrocarbons; reducing pressure on effluent from the reactor zone to flash volatile components into a vapor phase and recover a heavy liquid stream from a phase separator; condensing a major portion of the vapor phase by cooling under pressure to provide substantially all of a liquid olefinic recycle stream for combining with the feedstock, and recovering condensed water by-product from oxygenate conversion to hydrocarbons; and fractionating the heavy liquid stream from the flashed reactor effluent to recover a heavy distillate hydrocarbon product stream. The process of claim 1 comprising the further step of hydrotreating the distillate hydrocarbon product stream to obtain a distillate product having a viscosity of at least 1.8 centistokes, cetane number greater than 50, and bromine number less than 2.