Patents
US 8246815 B2: Methods for regeneration of solvents for extractive processes
- Granted
- 2012-08-21
- Filed
- 2010-08-10 application 12854150
- Type
- Utility · 34 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An improved solvent regeneration system for extractive distillation and liquid-liquid extraction processes capable of effectively removing heavy hydrocarbons and polymeric materials that otherwise develop in a closed solvent loop. The improved process employs a light hydrocarbon displacement agent, which is at least partially soluble in the solvent to squeeze the heavy hydrocarbons and polymeric materials out of the solvent, with virtually no additional energy requirement. It has been demonstrated that the light non-aromatic hydrocarbons in the raffinate stream generated from the extractive distillation or the liquid-liquid extractive process for aromatic hydrocarbons recovery can displace not only the heavy non-aromatic hydrocarbons but also the heavy aromatic hydrocarbons from the extractive solvent, especially when the aromatic hydrocarbons in the solvent are in the C10+ molecular weight range.
Source: PVGPATDIS, file of 2026-04-10 (ipg120821.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 |
|---|---|---|---|---|
| Kuang-Yeu Wu | Plano, TX | 22 | PVGPATDIS, file of 2026-04-10 | |
| Tzong-Bin Lin | Chiayi, TW | 23 | PVGPATDIS, file of 2026-04-10 | |
| Fu-Ming Lee | Katy, TX | 19 | PVGPATDIS, file of 2026-04-10 | |
| Tsung-Min Chiu | Kaohsiung, TW | 8 | PVGPATDIS, file of 2026-04-10 | |
| Jyh-Haur Hwang | Dali, TW | 10 | PVGPATDIS, file of 2026-04-10 | |
| Hung-Chung Shen | Chiayi, TW | 16 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07C | Acyclic or carbocyclic compounds | C07C7/08 | PVGPATDIS, file of 2026-04-10 |
| C07D | Heterocyclic compounds | C07D333/48 | 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 | C10G21/28 | 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 |
|---|---|---|---|---|---|
| 2010-08-10 | Assignment Assignment of assignor's interest | CHIU, TSUNG-MIN signed 2010-08-10 HWANG, JYH-HAUR signed 2010-08-10 LEE, FU-MING signed 2010-08-10 LIN, TZONG-BIN signed 2010-08-10 SHEN, HUNG-CHUNG signed 2010-08-10 WU, KUANG-YEU signed 2010-08-10 | CPC CORPORATION, TAIWAN TAIPEI CITY AMT INTERNATIONAL, INC. PLANO, TX | 24818/300 | 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.