Method of producing a fuel additive with a hydration unit
AssigneeSabic Global Technologies B.V.
InventorsMohammed Bismillah Ansari, Guillermo Leal, Vijay Dinkar Bodas, Naif Mohammed Al-Naddah Al-Otaibi
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Abstract
A method of producing a fuel additive includes: passing a raffinate stream comprising C4 hydrocarbons through a hydrogenation unit, forming a first process stream; passing the first process stream through an extractive distillation unit, forming a C4 olefin stream; passing the C4 olefin stream through a stripper column, forming a purified C4 olefin stream; and forming the fuel additive by passing the purified C4 olefin stream through a hydration unit.
Claims20
A method of producing a fuel additive, comprising:
- passing a raffinate stream comprising C4 hydrocarbons through a hydrogenation unit, forming a first process stream;
- passing the first process stream through an extractive distillation unit, forming a C4 olefin stream;
- passing the C4 olefin stream through a stripper column, forming a purified C4 olefin stream;
- and
- forming the fuel additive by passing the purified C4 olefin stream through a hydration unit.
A method of producing a fuel additive, comprising:
- passing a raffinate stream comprising C4 hydrocarbons through a hydrogenation unit, forming a first process stream, wherein greater than or equal to 90% by weight of any butadiene present in the raffinate stream is converted to 1-butene and/or 2-butene within the hydrogenation unit;
- passing the first process stream and a solvent comprising at least one of N-methylpyrrolidone, formylpyrrolidine, N-Formylmorpholine, or butyrolactone through an extractive distillation unit, producing a C4 olefin stream;
- passing the C4 olefin stream through a stripper column, producing a purified C4 olefin stream;
- passing the purified C4 olefin stream through a hydration unit, wherein the purified C4 olefin stream is exposed to an acid catalyst comprising at least one of phosphoric acid, a cation exchange resin, sulphonated polystyrene, hypophosphorous acid, polymer, niobium oxide, or a zeolite;
- and
- withdrawing a C4 alcohol fuel additive product from the hydration unit, wherein the fuel additive product comprises 0.01% to 50% by weight trimethyl-pentane;
- and
- wherein greater than or equal to 80% by weight of any butene present in the purified C4 olefin stream is converted to butanol within the hydration unit.
Dependencies are inferred from the claim text.