Patents
US 9440947 B2: Regeneration of selective solvents for extractive processes
- Granted
- 2016-09-13
- Filed
- 2012-12-06 application 13707554
- Type
- Utility · 30 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Recovering a polar hydrocarbon (HC) selective solvent substantially free of hydrocarbons (HCs) and other impurities from a lean solvent stream containing the selective solvent, measurable amounts of heavy aromatic HCs, and polymeric materials that are generated in an extractive distillation (ED) or liquid-liquid extraction (LLE) process. At least a portion of the lean solvent stream is contact in a solvent clean-up zone with a slip stream from the HC feed stream of the ED or LLE process or an external stream. The HC feed stream, such as pyrolysis gasoline or reformate, contains significant amounts of benzene and at least 50% polar (aromatic) HCs and serves as a displacement agent to remove the heavy HCs and polymeric material from the lean solvent stream. A magnetic filter can be used to remove the paramagnetic contaminants from the lean solvent.
Source: PVGPATDIS, file of 2026-04-10 (ipg160913.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| AMT International Inc. 26 patents | US company or organization | Plano, TX | AMT INTERNATIONAL, INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
| CPC CORPORATION, TAIWAN 57 patents | Foreign company or organization | Taipei, TW | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Fu-Ming Lee | Katy, TX | 19 | PVGPATDIS, file of 2026-04-10 | |
| Tzong-Bin Lin | Kaohsiung, TW | 23 | PVGPATDIS, file of 2026-04-10 | |
| Kuang-Yeu Wu | Plano, TX | 22 | PVGPATDIS, file of 2026-04-10 | |
| Jyh-Haur Hwang | Kaohsiung, TW | 10 | PVGPATDIS, file of 2026-04-10 | |
| Jeffrey Tsung-Min Chiu | Taipei, TW | 1 | PVGPATDIS, file of 2026-04-10 | |
| Jeng-Cheng Lee | Kaohsiung, TW | 7 | PVGPATDIS, file of 2026-04-10 | |
| Yu-Ming Wu | Kaohsiung, TW | 8 | PVGPATDIS, file of 2026-04-10 | |
| Han-Tjen Jan | Kaohsiung, TW | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07D | Heterocyclic compounds | C07D333/48 | PVGPATDIS, file of 2026-04-10 |
| B01D | Separation | B01D3/40 | PVGPATDIS, file of 2026-04-10 |
| C07C | Acyclic or carbocyclic compounds | C07C7/08 | PVGPATDIS, file of 2026-04-10 |
| C10G | Cracking hydrocarbon oils; production of liquid hydrocarbon mixtures, e.g. by destructive hydrogenation, oligomerisation, polymerisation ; recovery of hydrocarbon oils from oil-shale, oil-sand, or gases; refining mixtures mainly consisting of hydrocarbons; reforming of naphtha; mineral waxes | C10G7/08 | 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 |
|---|---|---|---|---|---|
| 2012-12-06 | Assignment Assignment of assignor's interest | WU, KUANG-YEU signed 2012-11-24 HWANG, JYH-HAUR signed 2012-11-29 LIN, TZONG-BIN signed 2012-11-29 LEE, FU-MNG signed 2012-12-01 LEE, JENG-CHENG signed 2012-12-01 JAN, HAN-TJEN signed 2012-12-03 WU, YU-MING signed 2012-12-03 CHIU, JEFFREY TSUNG-MIN signed 2012-12-06 | CPC CORPORATION, TAIWAN TAIPEI AMT INTERNATIONAL, INC. PLANO, TX | 29422/416 | 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.