Patents
US 9505988 B2: Circulation aid for primary fractional quench loops
- Granted
- 2016-11-29
- Filed
- 2011-10-19 application 13276599
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The invention directed to a method of reducing the increase in viscosity and the drop in the heat transfer coefficient that commonly occurs with quenching media which is repeatedly circulated through a hot reaction vessel. The method comprises adding a preserving composition to the quenching media. The composition comprises: a) high temperature polymerization inhibitor, b) a tar dispersant, and c) a viscosity reducer. The method allows the quenching media to remain effective longer than would otherwise be the case. By doing so this prevents having to devote excessive resources for such problems as: controlling heat recovery, viscosity increases, product downgrades or having to operate equipment at temperatures beyond their optimum performance designs.
Source: PVGPATDIS, file of 2026-04-10 (ipg161129.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Nalco Company LLC 271 patents | US company or organization | Naperville, IL | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Maria B. Manek | Meadows Place, TX | 1 | PVGPATDIS, file of 2026-04-10 | |
| Meha H. Shah | Houston, TX | 1 | PVGPATDIS, file of 2026-04-10 | |
| Daniel K. Frye | League City, TX | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| 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 | C10G29/24 | PVGPATDIS, file of 2026-04-10 |
| C07C | Acyclic or carbocyclic compounds | C07C7/20 | PVGPATDIS, file of 2026-04-10 |
| Y02P | Climate change mitigation technologies in the production or processing of goods | Y02P20/50 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T137/0391 | 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 |
|---|---|---|---|---|---|
| 2017-07-28 | Assignment Assignment of assignor's interest | NALCO COMPANY LLC signed 2017-02-27 | ECOLAB USA INC. ST. PAUL, MN | 43135/452 | ECORSEXC, file of 2026-09-25 |
| 2017-06-20 | Name change Change of name | NALCO COMPANY signed 2015-12-21 | NALCO COMPANY LLC WILMINGTON, DE | 42914/14 | ECORSEXC, file of 2026-09-25 |
| 2011-10-19 | Assignment Assignment of assignor's interest | MANEK, MARIA BEATA signed 2011-08-10 SHAH, MEHA H. signed 2011-08-10 FRYE, DANIEL K. signed 2011-09-03 | NALCO COMPANY NAPERVILLE, IL | 27086/552 | 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.