US 11,697,626 B2
Method of producing a fuel additive with a hydration unit
Mohammed Bismillah Ansari, Riyadh (SA); Guillermo Leal, Riyadh (SA); Vijay Dinkar Bodas, Riyadh (SA); and Naif Mohammed Al-Naddah Al-Otaibi, Riyadh (SA)
Assigned to SABIC GLOBAL TECHNOLOGIES B.V., Bergen op Zoom (NL)
Appl. No. 17/54,906
Filed by SABIC Global Technologies B.V., Bergen op Zoom (NL)
PCT Filed May 6, 2019, PCT No. PCT/IB2019/053697
§ 371(c)(1), (2) Date Nov. 12, 2020,
PCT Pub. No. WO2019/220257, PCT Pub. Date Nov. 21, 2019.
Claims priority of provisional application 62/673,289, filed on May 18, 2018.
Prior Publication US 2021/0214290 A1, Jul. 15, 2021
Int. Cl. C07C 5/05 (2006.01); C07C 7/08 (2006.01); C07C 29/08 (2006.01); C10G 11/00 (2006.01); C10L 1/16 (2006.01)
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
OG exemplary drawing
 
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.