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US 2026/0167879 A1Published application
Processes using fischer-tropsch products
AssigneeUop LLC
InventorsJan De Ren, John A. Petri, Robert C. Szczesniak
Life of this patent
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Abstract
Processes integrating product streams from Fischer-Tropsch processes with other hydrocarbon processes, including, hydroprocessing, and naphtha to ethane and propane to ethylene and propylene, are described. In some cases, the Fischer-Tropsch product stream is separated into two or more streams before being sent to the later process, while in other cases the entire Fischer-Tropsch product stream is sent to the subsequent process.
Claims15
An integrated process for making synthetic paraffinic kerosene and olefins comprising:
- converting a synthesis gas stream comprising H2 and CO, or CO2, or CO and CO2 in a Fischer-Tropsch reaction zone comprising a Fischer-Tropsch reactor in the presence of a Fischer-Tropsch catalyst under Fischer-Tropsch reaction conditions into a Fischer-Tropsch reaction mixture comprising C1 to about C100 normal paraffins;
- separating the Fischer-Tropsch mixture into a Fischer-Tropsch liquid stream comprising C3 to C21 normal paraffins and a Fischer-Tropsch wax stream comprising C22 to C100 normal paraffins in an FT fractionation zone;
- hydrocracking the Fischer-Tropsch wax stream in a hydrocracking reaction zone comprising a hydrocracking reactor in the presence of a hydrocracking catalyst under hydrocracking conditions forming a hydrocracking effluent stream comprising C8 to C19 normal paraffins;
- dewaxing the hydrocracking effluent stream in a dewaxing reaction zone comprising a dewaxing reactor in the presence of a dewaxing catalyst under dewaxing conditions forming a dewaxing reaction mixture comprising C8 to C19 normal paraffins and isoparaffins;
- separating the dewaxing reaction mixture into a FT-HCU naphtha stream comprising C8 to C12 normal paraffins and isoparaffins, and a FT synthetic paraffinic kerosene (FT-SPK) stream comprising C9 to C20 normal paraffins and isoparaffins in a dewaxing separation zone;
- separating the Fischer-Tropsch liquid stream into a FT naphtha stream comprising C5 to C12 normal paraffins and a C13+ stream comprising C13 to C21 normal paraffins in a second FT fractionation zone;
- cracking the FT naphtha stream from the second Fischer-Tropsch fractionation zone and the FT-HCU naphtha stream from the dewaxing reaction zone in an NEP reaction zone comprising an NEP reactor in the presence of an NEP catalyst under NEP reaction conditions to form an NEP effluent stream comprising C1-3 paraffins and C6-9 aromatics;
- separating the NEP effluent stream into an ethane stream and a propane stream in an NEP fractionation zone;
- steam cracking the ethane stream in a cracking reaction zone comprising a cracking reactor to form an ethylene effluent stream comprising ethylene;
- and
- dehydrogenating the propane in a dehydrogenation reaction zone comprising a dehydrogenation reactor in the presence of a dehydrogenation catalyst to form a propylene effluent stream comprising propylene.
8 more elements
An integrated process for making synthetic paraffinic kerosene and olefins comprising:
- conditioning a synthesis gas comprising H2 and CO, or CO2, or CO and CO2 to a H2:CO mole ratio of 2:1 and removing contaminants from the synthesis gas to form clean conditioned synthesis gas;
- converting the clean conditioned synthesis gas in a Fischer-Tropsch reaction zone comprising a Fischer-Tropsch reactor in the presence of a Fischer-Tropsch catalyst under Fischer-Tropsch reaction conditions into a Fischer-Tropsch reaction mixture comprising C1 to about C100 normal paraffins;
- separating the Fischer-Tropsch mixture into a Fischer-Tropsch liquid stream comprising C3 to C21 normal paraffins and a Fischer-Tropsch wax stream comprising C22 to C100 normal paraffins in a FT separation zone;
- hydrocracking the Fischer-Tropsch wax stream in a hydrocracking reaction zone comprising a hydrocracking reactor in the presence of a hydrocracking catalyst under hydrocracking conditions forming a hydrocracking effluent stream comprising C8 to C19 normal paraffins;
- dewaxing the hydrocracking effluent stream in a dewaxing reaction zone comprising a dewaxing reactor in the presence of a dewaxing catalyst under dewaxing conditions forming a dewaxing reaction mixture comprising C8 to C19 normal paraffins and isoparaffins;
- separating the dewaxing reaction mixture into a FT-HCU naphtha stream comprising C8 to C12 normal paraffins and isoparaffins, and a FT synthetic paraffinic kerosene (FT-SPK) stream comprising C9 to C20 normal paraffins and isoparaffins in a dewaxing separation zone;
- separating the Fischer-Tropsch liquid stream into a FT naphtha stream comprising C8 to C12 normal paraffins and a C13+ stream comprising C13+ normal paraffins a second FT separation zone;
- cracking the FT naphtha stream from the second Fischer-Tropsch fractionation zone and the FT-HCU naphtha stream from the dewaxing reaction zone in an NEP reaction zone comprising an NEP reactor in the presence of an NEP catalyst under NEP reaction conditions to form an NEP effluent stream comprising C1-3 paraffins and C6-9 aromatics;
- separating the NEP effluent stream into an ethane stream, a propane stream, a hydrogen stream, and an aromatics stream in an NEP separation zone;
- steam cracking the ethane stream in a cracking reaction zone comprising a cracking reactor to form an ethylene effluent stream comprising ethylene;
- dehydrogenating the propane in a dehydrogenation reaction zone comprising a dehydrogenation reactor in the presence of a dehydrogenation catalyst to form a propylene effluent stream comprising propylene;
- and
- combining the FT-SPK stream and the aromatics stream.
10 more elements
Dependencies are inferred from the claim text.