Desulfurization techniques

Patent metadata

Field	Value
Publication number	US-12215285-B2
Application number	US-202318310091-A
Country	US
Kind code	B2
Filing date	May 1, 2023
Priority date	Mar 15, 2020
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

A desulfurization system has an oxidation process unit, and a multi-stage, liquid-liquid extraction unit in series with the oxidation process unit. The multi-stage, liquid-liquid extraction unit spits a fuel input from the oxidation process unit into a desulfurized fuel that is output for use, and a by-product. A solvent/sulfur/hydrocarbon separation process unit receives the by-product from the multi-stage, liquid-liquid extraction unit.

First claim

The invention claimed is:

1. A desulfurization system comprising:
an oxidation process unit that outputs a sulfur-containing oxidized fuel;
an extraction fluid container;
a liquid-liquid extraction unit comprising a plurality of cascaded liquid-liquid extraction stages fluidly cooperative with both the oxidation process unit and the extraction fluid container to successively decrease a sulfur concentration within the sulfur-containing oxidized fuel; and
a pumping system comprising a plurality of pumps each of which are fluidly cooperative with a respective one of each of the plurality of cascaded liquid-liquid extraction stages such that upon receipt within the liquid-liquid extraction unit of at least a portion of the oxidized fuel from the oxidation process unit and at least a portion of an extraction fluid from the extraction fluid container, the pumping system provides substantially equal flow rates across each of the cascaded liquid-liquid extraction stages within the liquid-liquid extraction unit.

2. The desulfurization system of claim 1 , wherein output from each one of the plurality of the liquid-liquid extraction stages comprises a first output containing a reduced sulfur fuel and a second output containing an increased sulfur residual.

3. The desulfurization system of claim 2 , further comprising a sulfur separation process unit for the receipt of at least a portion of the second output.

4. The desulfurization system of claim 3 , wherein the sulfur separation process unit comprises a distillation column.

5. The desulfurization system of claim 4 wherein the sulfur separation process unit further comprises an oil/aqueous phase separator that is in downstream fluid communication with the distillation column.

6. The desulfurization system of claim 5 , further comprising a transportable platform upon which a substantial entirety of the desulfurization system is situated.

7. The desulfurization system of claim 5 , further comprising a stationary platform upon which a substantial entirety of the desulfurization system is situated.

8. The desulfurization system of claim 1 , wherein the oxidation process unit comprises a reactor that contains a solid catalyst.

9. The desulfurization system of claim 1 , further comprising a transportable platform upon which each of the liquid-liquid extraction unit and the pumping system are situated.

10. The desulfurization system of claim 9 , wherein the transportable platform comprises a wheeled platform.

11. The desulfurization system of claim 1 , wherein the pumping system further comprises a single motor and a power transmission system such that all of the plurality of pumps operate off of the single motor through the power transmission system.

Assignees

• Univ Of Dayton

Inventors

• Vam Albert S
• Flora Giacomo

Classifications

• C10G2400/08

  Jet fuel · CPC title

• C10G2400/04

  Diesel oil · CPC title

• C10G2300/4081

  Recycling aspects · CPC title

• C10G2300/202

  Heteroatoms content, i.e. S, N, O, P · CPC title

• C10G27/04

  with oxygen or compounds generating oxygen · CPC title