Patents
US 8766028 B2: Separating styrene from C6-C8 aromatic hydrocarbons
- Granted
- 2014-07-01
- Filed
- 2011-11-04 application 13373094
- Type
- Utility · 14 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The invention disclosed relates to a process for refining a hydrocarbon feed to make substantially styrene-free C6-C8 aromatic hydrocarbons (BTX). The hydrocarbon feed, for example, unhydrotreated pyrolysis gasoline, is distilled to make a BTX rich stream containing styrene which is fractionated to separate C6 and C7 hydrocarbons from C8 hydrocarbons including styrene. Styrene in the C8 hydrocarbons reacts in the presence of a selective etherification catalyst with a C1-C3 lower alkyl alcohol to form the corresponding styrene ether, which is then separated by distillation into a styrene ether stream and a C8 hydrocarbons rich stream. The C8 hydrocarbons rich stream is then re-mixed with the C6 and C7 hydrocarbons, and sent to hydrogenation reactors to remove sulphur and olefinic hydrocarbons to form substantially styrene-free BTX.
Source: PVGPATDIS, file of 2026-04-10 (ipg140701.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 | |
| Adam T. Lee | Dallas, TX | 11 | PVGPATDIS, file of 2026-04-10 | |
| Karl T. Chuang | Edmonton, CA | 19 | PVGPATDIS, file of 2026-04-10 | |
| Hung-Chung Shen | Kaohsiung, TW | 16 | PVGPATDIS, file of 2026-04-10 | |
| Tzong-Bin Lin | Kaohsiung, TW | 23 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C07C | Acyclic or carbocyclic compounds | C07C7/14891 | PVGPATDIS, file of 2026-04-10 |
| Y02P | Climate change mitigation technologies in the production or processing of goods | Y02P20/10 | 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 |
|---|---|---|---|---|---|
| 2012-09-24 | Assignment Assignment of assignor's interest | AMT INTERNATIONAL INC. signed 2012-09-10 | CPC CORPORATION TAIPEI, 11010 TAIWAN | 29074/265 | ECORSEXC, file of 2026-09-25 |
| 2011-11-04 | Assignment Assignment of assignor's interest | LEE, ADAM T. signed 2011-11-01 LIN, TZONG-BIN signed 2011-11-01 SHEN, HUNG-CHUNG signed 2011-11-01 WU, KUANG-YEU signed 2011-11-01 CHUANG, KARL TZE-TANG signed 2011-11-02 | AMT INTERNATIONAL INC. PLANO, TX | 27346/694 | 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.