Patents
US 7666299 B2: Extractive distillation process for recovering aromatics from petroleum streams
- Granted
- 2010-02-23
- Filed
- 2007-08-10 application 11837459
- Type
- Utility · 54 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A process for recovering polar hydrocarbons from non-polar hydrocarbons, such as aromatics from non-aromatics, naphthenes from paraffins and isoparaffins, or olefins from paraffins and isoparaffins, in feed mixtures containing at least a measurable amount of heavier hydrocarbons. This improved extractive distillation (ED) process recovers aromatic hydrocarbons including benzene, toluene, and xylenes from the C6-C8 petroleum streams containing a measurable amount of C9+ hydrocarbons. The ED process also recovers benzene and toluene from the C6-C7 petroleum streams containing a measurable amount of C8+ hydrocarbons. The ED solvent utilized to recover and purify the aromatic hydrocarbons from the petroleum stream with a heavier than intended feedstock of hydrocarbons is also regenerated and recovered.
Source: PVGPATDIS, file of 2026-04-10 (ipg100223.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 AG 11 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 | |
| Tsung-Min Chiu | Kaohsiung, TW | 8 | PVGPATDIS, file of 2026-04-10 | |
| Tzong-Bin Lin | Chiayi, TW | 23 | PVGPATDIS, file of 2026-04-10 | |
| Hung-Chung Shen | Chiayi, TW | 16 | PVGPATDIS, file of 2026-04-10 | |
| Yu-Ming Wu | Guanmiao, TW | 8 | PVGPATDIS, file of 2026-04-10 | |
| Tung-Hsiung Kuo | Tainan, TW | 3 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B01D | Separation | B01D3/40 | 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 |
|---|---|---|---|---|---|
| 2008-09-03 | Assignment Assignment of assignor's interest | CHIU, TSUNG-MIN signed 2008-01-23 LIN, TZONG-BIN signed 2008-02-15 SHEN, HUNG-CHUNG signed 2008-02-15 KUO, TUNG-HSIUNG signed 2008-08-21 WU, KUANG-YEU signed 2008-08-21 WU, YU-MING signed 2008-08-21 | AMT INTERNATIONAL, INC. PLANO, TX CPC CORPORATION, TAIWAN TAIPEI | 21475/260 | 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.