Hydrocarbon products and methods of preparing hydrocarbon products
AssigneeSyntroleum Corporation
InventorArmen N. Abazajian
Life of this patent
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Abstract
A method of preparing high linear paraffin or high end-chain monomethyl content products is accomplished by converting synthesis gas in a Fischer-Tropsch reaction to hydrocarbon products. These may be hydrotreated to provide an n-paraffin content of greater than 50% by weight, with substantially all branched paraffins being monomethyl end-chain branched paraffins. At least one non-linear paraffin isomer, which may be a monomethyl paraffin isomer, may be separated from the hydrocarbon products through distillation to provide an n-paraffin product having an n-paraffin content percentage by weight of the n-paraffin product that is greater than the initial n-paraffin content.
Claims56
A method of forming a hydrocarbon product comprising:
- converting synthesis gas in a Fischer-Tropsch reaction to hydrocarbon products;
- and
- hydrotreating the hydrocarbon products to provide hydrotreated hydrocarbon products, the hydrotreated hydrocarbon products having an n-paraffin content of at least 50% by weight of the hydrotreated hydrocarbon products and branched paraffins, and wherein substantially all of the branched paraffins are monomethyl branched paraffins and the ratio of end-chain monomethyl branching to internal branching of the monomethyl branched paraffins is at least about 1:1.5.
A method of forming a hydrocarbon product comprising:
- converting synthesis gas in a Fischer-Tropsch reaction to hydrocarbon products;
- hydrotreating the hydrocarbon products to provide hydrotreated hydrocarbon products, the hydrotreated hydrocarbon products having an initial n-paraffin content of greater than about 67% by weight of the hydrotreated hydrocarbon products and having branched paraffins;
- and
- separating at least a portion of at least one non-linear branched paraffin isomer from the hydrocarbon products through distillation to provide an n-paraffin product having an n-paraffin content percentage by weight of the n-paraffin product that is greater than the initial n-paraffin content.
A method of treating a hydrotreated Fischer-Tropsch (F-T) product in the C5 to C24 range, the method comprising:
- a) separating a lightest isomer paraffin and a heaviest isomer paraffin through distillation to provide a selected range of intermediate paraffins;
- b) separating at least one of a light n-paraffin isomer and a heavy n-paraffin isomer from the intermediate paraffins to provide a monomethyl isomer-rich stream, which includes at least one of a monomethyl isomer of one carbon more than the light n-paraffin isomer and a monomethyl isomer of the same carbon number of the heavy n-paraffin isomer, and a remaining intermediate paraffin stream from the intermediate paraffins through distillation;
- and
- c) repeating separation of at least one of a n-paraffin and monomethyl isomer-rich stream of step (b) from said remaining intermediate paraffin stream at least one or more times;
- and
- d) at least one of:
- i) combining the n-paraffin isomers separated in steps (b) and (c) with the remaining intermediate paraffin stream to make a high n-paraffin product;
- and
- ii) combining the monomethyl isomer-rich streams separated in steps (b) and (c) to make a high monomethyl isomer-content product.
A method of forming hydrocarbon products comprising:
- converting synthesis gas in a Fischer-Tropsch reaction to hydrocarbon F-T reaction products;
- hydrotreating the hydrocarbon F-T reaction products to form hydrocarbon products;
- isolating C8 to C24 hydrocarbons from the hydrocarbon products, the C8 to C24 hydrocarbons having an initial n-paraffin content greater than about 92% by weight of the hydrotreated hydrocarbon products and having an initial monomethyl branched paraffin content of greater than about 2% by weight of the C8 to C24 hydrocarbon products;
- separating at least a portion of at least one monomethyl branched paraffin isomer from the C8 to C24 hydrocarbon products through distillation to provide an n-paraffin product having an n-paraffin content percentage by weight of the n-paraffin product that is greater than the initial n-paraffin content.
A method of forming a hydrocarbon product comprising:
- converting synthesis gas in a Fischer-Tropsch reaction to hydrocarbon products;
- and
- hydrotreating at least a portion of the hydrocarbon products to provide hydrotreated hydrocarbon products;
- removing oxygenates from the hydrotreated hydrocarbon products by passing the hydrotreated hydrocarbon products over at least one of an alumina, silica or alumina-silica molecular sieve adsorbent so that the hydrotreated hydrocarbon products contain less than 20 ppm by weight of oxygenates, and wherein the hydrotreated hydrocarbon products contain from 50 to 500 ppm by weight oxygenates prior to the removal of oxygenates.
Dependencies are inferred from the claim text.