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US 12,264,123 B2Granted
Method of producing a fuel additive
AssigneesSabic Global Technologies B.V., Saudi Arabian Oil Company
InventorsGuillermo Leal, Naif Mohammed Al-Naddah Al-Otaibi, Kareemuddin Mahaboob Shaik, Mohammed Bismillah Ansari, Vijay Dinkar Bodas
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Abstract
A method of producing a fuel additive includes passing a feed stream comprising C4 hydrocarbons through a first hydrogenation unit producing a first process stream; passing the first process stream through a distillation unit; withdrawing a 2-butene stream from the distillation unit: passing the 2-butene stream through a second hydrogenation unit producing a 1-butene stream; passing at least a portion of the 1-butene stream through a separation unit; and passing the 1-butene stream through a hydration unit producing the fuel additive.
Claims20
A method of producing a fuel additive, comprising:
- passing a feed stream comprising C4 hydrocarbons through a first hydrogenation unit producing a first process stream;
- passing the first process stream through a distillation unit;
- withdrawing a 2-butene stream from the distillation unit;
- passing the 2-butene stream through a second hydrogenation unit producing a 1-butene stream;
- passing at least a portion of the 1-butene stream produced in the second hydrogenation unit through a separation unit producing a separated 1-butene stream;
- and
- passing the separated 1-butene stream produced in the separation unit through a hydration unit producing the fuel additive,
- wherein
- the distillation unit comprises a kinetic distillation column,
- the method further comprises withdrawing an iso-stream from the distillation unit, passing a raw material stream comprising hydrocarbons through a hydrocarbon cracking unit, withdrawing the feed stream from the cracking unit, and recycling the iso-stream back to the raw material stream, wherein the iso-stream comprises isobutane and isobutylene, and wherein the iso-stream comprises greater than or equal to 90% by weight isobutane and/or isobutylene, based on the total weight of the iso-stream,
- the method further comprises withdrawing an iso-stream from the distillation unit, and passing the iso-stream through a propylene and/or ethylene cracking unit, wherein the iso-stream comprises isobutane and isobutylene, and wherein the iso-stream comprises greater than or equal to 90% by weight isobutane and/or isobutylene, based on the total weight of the iso-stream, or
- the method further comprises withdrawing a butane stream comprising n-butane and/or isobutane from the separation unit and passing the butane stream through a propylene and/or ethylene cracking unit.
9 more elements
A method of producing a fuel additive, comprising:
- passing a feed stream comprising C4 hydrocarbons through a first hydrogenation unit producing a first process stream, wherein greater than or equal to 90% by weight of butadiene present in the feed stream, based on the total weight of the butadiene present in the feed stream, is converted to 1-butene and/or 2-butene within the first hydrogenation unit;
- passing the first process stream through a distillation unit and withdrawing a 2-butene stream from the distillation unit;
- passing the 2-butene stream through a second hydrogenation unit producing a 1-butene stream;
- recycling at least a portion of the 1-butene stream back to the distillation unit;
- passing at least a portion of the 1-butene stream through a separation unit and through a hydration unit;
- and
- withdrawing a fuel additive product from the hydration unit, wherein the fuel additive product comprises greater than or equal to 0.5% by weight trimethylpentane based on the total weight of the fuel additive product, and the total weight of the fuel additive product is 100% by weight.
4 more elements
A method of producing a fuel additive, comprising:
- passing a feed stream comprising C4 hydrocarbons through a first hydrogenation unit producing a first process stream;
- passing the first process stream through a distillation unit;
- withdrawing a 2-butene stream from the distillation unit;
- passing the 2-butene stream through a second hydrogenation unit producing a 1-butene stream;
- passing at least a portion of the 1-butene stream through a separation unit;
- and
- passing the 1-butene stream through a hydration unit producing the fuel additive,
- wherein
- the distillation unit comprises a kinetic distillation column,
- the method further comprises passing a raw material stream comprising hydrocarbons through a hydrocarbon cracking unit, withdrawing the feed stream from the cracking unit, withdrawing an iso-stream from the distillation unit, wherein the iso-stream comprises isobutane and isobutylene, and recycling the iso-stream back to the raw material stream,
- the method further comprises withdrawing an iso-stream from the distillation unit, wherein the iso-stream comprises isobutane and isobutylene, and passing the iso-stream through a propylene and/or ethylene cracking unit,
- the method further comprises withdrawing a butane stream comprising n-butane and/or isobutane from the separation unit and passing the butane stream through a propylene and/or ethylene cracking unit,
- the method further comprises withdrawing a fuel additive product from the hydration unit, wherein the fuel additive product comprises at least one of 1-butanol, 2-butanol, tert-butyl alcohol, or a C4 dimer and the fuel additive product comprises greater than or equal to 0.01% by weight and less than or equal to 20% by weight trimethylpentane based on the total weight of the fuel additive product, and the total weight of the fuel additive product is 100% by weight, or
- a combination thereof.
11 more elements
Dependencies are inferred from the claim text.