Title:
CATALYTIC GASOLINE DESULFURIZATION METHOD HAVING ALSO OLEFIN SELECTIVE REMOVAL FUNCTION
Document Type and Number:
WIPO Patent Application WO/2018/090584
Kind Code:
A1
Abstract:
A catalytic gasoline desulfurization method having also an olefin selective removal function, comprising: when a catalytic gasoline is pre-hydrotreated, cutting into a light fraction, an intermediate fraction, and a heavy fraction; performing a liquid-liquid extraction desulfurization treatment with respect to the intermediate fraction to produce a sulfur-depleted oil and a rich solvent containing a sulfur-rich oil; light fraction back-extracting the rich solvent, using C5 olefin therein to replace a macromolecular acyclic olefin in the sulfur-rich oil, thus gathering together C5 isomeric alkene, a cyclic olefin, and a sulfide in the sulfur-rich oil; performing hydrogenation, olefin reduction, and desulfurization treatments on the heavy fraction together with the sulfur-rich oil removed from the back-extracted solvent, saturating the olefin in the oil, and finally preparing together with the sulfur-depleted oil to produce an all-fraction gasoline. The sulfur content of the catalytic gasoline produced per the method can be reduced to 10 ppm or less, thus ensuring reduced octane loss while reducing the olefin content of the catalytic gasoline.
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Inventors:
HAO TIANZHEN (CN)
GAO XUHUI (CN)
GAO XUHUI (CN)
Application Number:
PCT/CN2017/084460
Publication Date:
May 24, 2018
Filing Date:
May 16, 2017
Export Citation:
Assignee:
HEBEI REFINING TECH CO LTD (CN)
International Classes:
C10G67/00
Foreign References:
| CN106520198A | 2017-03-22 | |||
| CN103555359A | 2014-02-05 | |||
| CN105296000A | 2016-02-03 | |||
| CN105255515A | 2016-01-20 |
Attorney, Agent or Firm:
BEIJING ZHAOJUN UNION INTELLECTUAL PROPERTY LAW FIRM (CN)
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