Patents
US 11325065 B2: Sulfur recovery operation with improved carbon dioxide recovery
- Granted
- 2022-05-10
- Filed
- 2020-05-18 application 16877415
- Type
- Utility · 23 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A process for recovering sulfur and carbon dioxide from a sour gas stream, the process comprising the steps of: providing a sour gas stream to a membrane separation unit, the sour gas stream comprising hydrogen sulfide and carbon dioxide; separating the hydrogen sulfide from the carbon dioxide in the membrane separation unit to obtain a retentate stream and a first permeate stream, wherein the retentate stream comprises hydrogen sulfide, wherein the permeate stream comprises carbon dioxide; introducing the retentate stream to a sulfur recovery unit; processing the retentate stream in the sulfur recovery unit to produce a sulfur stream and a tail gas stream, wherein the sulfur stream comprises liquid sulfur; introducing the permeate stream to an amine absorption unit; and processing the permeate stream in the amine absorption unit to produce an enriched carbon dioxide stream.
Source: PVGPATDIS, file of 2026-04-10 (ipg220510.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| SAUDI ARABIAN OIL COMPANY 7,465 patents | Foreign company or organization | Not reported | PVGPATDIS, file of 2026-04-10 | |
| Membrane Technology and Research, Inc. 62 patents | US company or organization | Newark, CA | MEMBRANE TECHNOLOGY AND RESEARCH, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Milind M. Vaidya | Dhahran, SA | 38 | PVGPATDIS, file of 2026-04-10 | |
| Sebastien A. Duval | Dhahran, SA | 66 | PVGPATDIS, file of 2026-04-10 | |
| Feras Hamad | Dhahran, SA | 17 | PVGPATDIS, file of 2026-04-10 | |
| Richard W. Baker | Newark, CA | 35 | PVGPATDIS, file of 2026-04-10 | |
| Tim Merkel | Newark, CA | 5 | PVGPATDIS, file of 2026-04-10 | |
| Kaaeid A. Lokhandwala | Newark, CA | 10 | PVGPATDIS, file of 2026-04-10 | |
| Ahmad Bahamdan | Dammam, SA | 15 | PVGPATDIS, file of 2026-04-10 | |
| Faisal D. Al-Otaibi | Dhahran, SA | 8 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B01D | Separation | B01D53/229 | PVGPATDIS, file of 2026-04-10 |
| C01B | Non-metallic elements; compounds thereof; ; metalloids or compounds thereof not covered by subclass c01c | C01B17/021 | PVGPATDIS, file of 2026-04-10 |
| Y02C | Capture, storage, sequestration or disposal of greenhouse gases [ghg] | Y02C20/40 | PVGPATDIS, file of 2026-04-10 |
| Y02P | Climate change mitigation technologies in the production or processing of goods | Y02P20/151 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2020-06-24 | Assignment Assignment of assignor's interest | BAKER, RICHARD signed 2020-05-28 MERKEL, TIM signed 2020-06-18 LOKHANDWALA, KAAEID signed 2020-06-19 | MEMBRANE TECHNOLOGY AND RESEARCH, INC. NEWARK, CA | 53030/881 | ECORSEXC, file of 2026-09-25 |
| 2020-05-19 | Assignment Assignment of assignor's interest | AL-OTAIBI, FAISAL D. signed 2020-05-12 BAHAMDAN, AHMAD A. signed 2020-05-12 DUVAL, SEBASTIEN A. signed 2020-05-12 HAMAD, FERAS signed 2020-05-12 VAIDYA, MILIND M. signed 2020-05-12 | SAUDI ARABIAN OIL COMPANY DHAHRAN | 52696/593 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.