CPC C07C 5/05 (2013.01) [C07C 7/08 (2013.01); C07C 29/08 (2013.01); C10G 11/00 (2013.01); C10L 1/1608 (2013.01); C10L 2200/0423 (2013.01); C10L 2230/22 (2013.01)] | 18 Claims |
1. 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 at least a portion of butadiene present in the raffinate stream is converted to 1-butene and/or 2-butene within the hydrogenation unit;
passing the first process stream comprising 1-butene and/or 2-butene through an extractive distillation unit, forming a C4 olefin stream comprising a solvent and a C4 paraffin stream;
passing the C4 olefin stream comprising the solvent through a stripper column, forming a purified C4 olefin stream, wherein at least a portion of the solvent is removed from the C4 olefin stream in the stripper column; and
forming the fuel additive comprising 5% to 50% by weight trimethyl-pentane by passing the purified C4 olefin stream through a hydration unit, wherein at least a portion of butene present in the purified C4 olefin stream is converted to butanol within the hydration unit;
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;
wherein the purified C4 olefin stream comprises less than 1.0% butadiene by weight prior to passing through the hydration unit; and
wherein the purified C4 olefin stream comprises less than 1.0% by weight n-butane and iso-butane prior to passing through the hydration unit.
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