Patents
US 9487408 B2: Reducing aluminosilicate scale in the bayer process
- Granted
- 2016-11-08
- Filed
- 2012-02-23 application 13403282
- Type
- Utility · 12 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The invention provides a method of inhibiting the accumulation of DSP scale in the liquor circuit of Bayer process equipment. The method includes adding one or more particular silane based small molecules to the liquor fluid circuit. These scale inhibitors reduce DSP scale formation and thereby increase fluid throughput, increase the amount of time Bayer process equipment can be operational and reduce the need for expensive and dangerous acid washes of Bayer process equipment. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
Source: PVGPATDIS, file of 2026-04-10 (ipg161108.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 |
|---|---|---|---|---|
| Everett C. Phillips | Batavia, IL | 5 | PVGPATDIS, file of 2026-04-10 | |
| Timothy La | Fremantle, AU | 7 | PVGPATDIS, file of 2026-04-10 | |
| Kailas B. Sawant | Aurora, IL | 26 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C01F | Compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals | C01F7/0633 | PVGPATDIS, file of 2026-04-10 |
| C02F | Treatment of water, waste water, sewage, or sludge | C02F5/12 | PVGPATDIS, file of 2026-04-10 |
| C07F | Acyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium | C07F7/025 | 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 |
|---|---|---|---|---|---|
| 2017-11-01 | Assignment Assignment of assignor's interest | NALCO COMPANY LLC signed 2017-02-27 | ECOLAB USA INC. ST. PAUL, MN | 44347/104 | ECORSEXC, file of 2026-09-25 |
| 2017-09-20 | Name change Change of name | NALCO COMPANY signed 2015-12-29 | NALCO COMPANY LLC NAPERVILLE, IL | 43924/587 | ECORSEXC, file of 2026-09-25 |
| 2012-02-23 | Assignment Assignment of assignor's interest | SAWANT, KAILAS B. signed 2012-02-07 LA, TIMOTHY signed 2012-02-09 PHILLIPS, EVERETT C. signed 2012-02-10 | NALCO COMPANY NAPERVILLE, IL | 27752/386 | 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.