Patents
US 11420153 B2: Hydrogen sulfide-carbon dioxide membrane separation systems and processes
- Granted
- 2022-08-23
- Filed
- 2020-05-18 application 16877433
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A process for recovering sulfur from a sour gas is provided. The process includes the steps of: providing the sour gas to a membrane separation unit having a carbon dioxide-selective membrane that comprises a perfluoropolymer, wherein the sour gas comprises carbon dioxide and at least 1 mol % hydrogen sulfide; separating the sour gas using the carbon dioxide-selective membrane in the membrane separation stage to obtain hydrogen sulfide-enriched gas and hydrogen sulfide-stripped gas, wherein the hydrogen sulfide-enriched gas has a hydrogen sulfide concentration of at least 20 mol %, and wherein the hydrogen sulfide-stripped gas comprises carbon dioxide; and processing the hydrogen sulfide-enriched gas in a sulfur recovery unit to obtain sulfur.
Source: PVGPATDIS, file of 2026-04-10 (ipg220823.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 | B01D53/228 | PVGPATDIS, file of 2026-04-10 |
| C01B | Non-metallic elements; compounds thereof; ; metalloids or compounds thereof not covered by subclass c01c | C01B17/167 | PVGPATDIS, file of 2026-04-10 |
| C08F | Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds | C08F14/26 | PVGPATDIS, file of 2026-04-10 |
| C09K | Materials for miscellaneous applications, not provided for elsewhere | C09K8/58 | 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 2020-06-17 MERKEL, TIM signed 2020-06-17 LOKHANDWALA, KAAEID signed 2020-06-19 | MEMBRANE TECHNOLOGY AND RESEARCH, INC. NEWARK, CA | 53031/906 | 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 | 52698/305 | 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.