Removal of branched dibenzothiophenes from hydrocarbon mixtures via charge transfer complexes with a TAPA-functionalized adsorbent
AssigneeChevron U.S.A. Inc.
InventorsXiaolin Wei, Scott Michael Husson, Marcus V. Dutra e Mello, Daniel Chinn
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Abstract
A process for producing an adsorbent where a metal oxide is reacted with an alkoxy silane to produce an epoxy-functionalized metal oxide. This product is reacted with an amino-substituted propionic acid and a nitro-substituted fluorenone, and this product is grafted to the epoxy-functionalized metal oxide. This grafted product is the adsorbent, which may be contacted with a hydrocarbon mixture having at least one sulfur containing compound in order to remove this sulfur containing compound. Also disclosed is a process for adding polymerization groups to an adsorbent.
Claims21
A process for producing an adsorbent comprising:
- (A) providing an epoxy-functionalized metal oxide;
- (B) providing 2,4,5,7-tetranitro-9-fluorenylideneaminooxy propionic acid (TAPA);
- (C) reacting the epoxy-functionalized metal oxide with 2,4,5,7-tetranitro-9-fluorenylideneaminooxy propionic acid (TAPA), producing the adsorbent;
- wherein the adsorbent upon contact with a hydrocarbon mixture comprising at least one sulfur containing compound forms a charge transfer complex with the one sulfur containing compound to remove the at least one sulfur containing compound from the hydrocarbon mixture.
A process for producing an adsorbent comprising:
- (A) reacting a metal oxide with an alkoxy silane to produce an epoxy-functionalized metal oxide wherein the conversion to epoxy groups is less than 100% resulting in residual Si—OH groups on the surface of the metal oxide;
- (B) reacting the epoxy-functionalized metal oxide having residual expoxy groups on the surface with an amino-substituted propionic acid wherein the conversion rate is less than 100% resulting in residual epoxy groups on the surface of the product;
- (C) reacting the product of step (B) with a bromo-substituted propionic acid wherein bromo-substituted propionic acid reacts with in the residual groups;
- and
- (D) graft polymerizing ethylene glycol dimethacrylate onto the product of step (C),
- wherein the adsorbent produced by the process, upon contact with a hydrocarbon mixture comprising at least one sulfur containing compound forms a charge transfer complex with the one sulfur containing compound to remove the at least one sulfur containing compound from the hydrocarbon mixture.
Dependencies are inferred from the claim text.