摘要:
A process is provided to make ethylene and propylene from a carbonaceous feedstock. The process comprises preparing a gaseous mixture of carbon monoxide and hydrogen from a feedstock. A Fischer Tropsch synthesis is then performed on the gaseous mixture to obtain a Fischer Tropsch product along with unconverted carbon monoxide and hydrogen. The Fischer Tropsch product in admixture with the unconverted carbon monoxide and hydrogen from the previous step is then subjected to terminal cracking to form ethylene and propylene.
摘要:
A hydrogenation catalyst particularly suitable for hydrogenating oxygenates in a hydrogenation unit of a Fischer-Tropsch plant is disclosed. A preferred embodiment comprises more than 5% and less than 20% nickel based on a wide pore alumina support. The catalyst successfully hydrogenates oxygenates which otherwise tend to poison a catalyst in a hydroconversion unit downstream. Moreover, the temperature at which the unwanted hydrogenolysis of long chain paraffins to methane occurs is higher for one catalyst disclosed herein than a comparable known catalyst. This allows the hydrogenation plant to operate at a higher temperature.
摘要:
Process to optimize the yield of gas oils from a Fischer-Tropsch derived feed by performing the following steps: (a) performing a hydroconversion/hydroisomerisation step on part of the Fischer-Tropsch derived feed; (b) performing a hydroconversion/hydroisomerisation step on another part of the Fischer-Tropsch feed at a conversion greater than the conversion in step (a); and (c) isolating by means of distillation a gas oil fraction from the two reaction products obtained in steps (a) and (b).
摘要:
A hydrogenation catalyst particularly suitable for hydrogenating oxygenates in a hydrogenation unit of a Fischer-Tropsch plant is disclosed. A preferred embodiment comprises more than 5% and less than 20% nickel based on a wide pore alumina support. The catalyst successfully hydrogenates oxygenates which otherwise tend to poison a catalyst in a hydroconversion unit downstream. Moreover, the temperature at which the unwanted hydrogenolysis of long chain paraffins to methane occurs is higher for one catalyst disclosed herein than a comparable known catalyst. This allows the hydrogenation plant to operate at a higher temperature.
摘要:
A process for hydrocracking and hydro-isomerisation of a paraffinic feedstock obtained by Fischer-Tropsch hydrocarbon synthesis comprising at least 50 wt % of components boiling above 370° C. to obtain a hydro-isomerised feedstock, the process comprising contacting the feedstock, in the presence of hydrogen, at elevated temperature and pressure with a catalyst comprising a hydrogenating compound supported on a carrier comprising amorphous silica-alumina, the carrier having a pore volume of at least 0.8 ml/g, wherein at most 40% of the pore volume comes from pores having a pore diameter above 35 nm and wherein at most 20% of the pore volume comes from pores having a pore diameter below 50 Å and above 37 Å, the carrier having a median pore diameter of at least 85 Å, wherein the product of (surface area per pore volume) and (median pore diameter as measured by mercury intrusion porosimetry) of the carrier is at least 34,000 Å·m2/ml.
摘要:
A process for hydrocracking and hydro-isomerization of a paraffinic feedstock obtained by Fischer-Tropsch hydrocarbon synthesis comprising at least 50 wt % of components boiling above 370° C. to obtain a hydro-isomerized feedstock, the process comprising contacting the feedstock, in the presence of hydrogen, at elevated temperature and pressure with a catalyst comprising a hydrogenating compound supported on a carrier comprising amorphous silica-alumina, the carrier having a pore volume of at least 0.8 ml/g, wherein at most 40% of the pore volume comes from pores having a pore diameter above 35 nm and wherein at most 20% of the pore volume comes from pores having a pore diameter below 50 Å and above 37 Å, the carrier having a median pore diameter of at least 85 Å, wherein the product of (surface area per pore volume) and (median pore diameter as measured by mercury intrusion porosimetry) of the carrier is at least 34,000 Å·m2/ml.
摘要:
A process to prepare a waxy raffinate product by performing the following steps: (a) subjecting a Fischer-Tropsch derived product having a weight ratio of compounds boiling above 540° C. and compounds boiling between 370 and 540° C. of greater than 2 to a hydroconversion step and (b) fractionating the effluent of step (a) to obtain products boiling in the fuels range and a waxy raffinate product boiling between 350 and 600° C.
摘要:
Process to optimize the yield of base oils from a Fischer-Tropsch derived feed by performing the following steps (a) performing a hydroconversion/hydroisomerization step on part of the Fischer-Tropsch derived feed; (b) performing a hydroconversion/hydroisomerization step on another part of the Fischer-Tropsch feed at a conversion greater than the conversion in step (a); and (c) isolating by means of distillation a fraction boiling in the base oil range from the two reaction products obtained in steps (a) and (b) and performing a pour point reducing step on said fraction.
摘要:
Process to optimize the yield of base oils from a Fischer-Tropsch derived feed by performing the following steps (a) performing a hydroconversion/hydroisomerisation step on part of the Fischer-Tropsch derived feed; (b) performing a hydro-conversion/hydroisomerisation step on another part of the Fischer-Tropsch feed at a conversion greater than the conversion in step (a); and (c) isolating by means of distillation a fraction boiling in the base oil range from the two reaction products obtained in steps (a) and (b) and performing a pour point reducing step on said fraction.
摘要:
Process to prepare an iso-paraffinic product having a carbon range of Cx to Cy and a iso-paraffinic product having a carbon range of Cn to Cm from a Fischer-Tropsch derived feed by performing the following steps, (a) obtaining from the Fischer-Tropsch derived feed at least two different compositions (i) and (ii), which composition (i) has a greater fraction of compounds in the carbon range of C2n to C2m than composition (ii) and composition (ii) has a greater content of C2x to C2y than composition (i); (b) performing separately a hydroconversion/hydroisomerisation step on feed compositions (i) and (ii) and isolating from the thus obtained effluents the iso-paraffinic product having a carbon range of Cx to Cy and the iso-paraffinic product having a carbon range of Cn to Cm.