Patents
US 8052763 B2: Method for removing dissolved solids from aqueous waste streams
- Granted
- 2011-11-08
- Filed
- 2008-05-29 application 12128871
- Type
- Utility · 29 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method for removing dissolved solids from a waste stream, such as that produced in flue gas scrubbing, through an evaporation-crystallization process operated at relatively low temperature. A waste stream is directed into an evaporator and heated at a temperature of less than 60° C. at a pressure below atmospheric pressure. The waste stream is concentrated through the evaporation process and forms a slurry stream having crystallized solids. At the low temperature of evaporation, the solids crystallize at substantially lower temperature and the solution has a substantially lower boiling point elevation than at atmospheric pressure. The slurry stream is directed to a solid-liquid separator where the crystallized solids in the slurry stream are separated, producing a solid cake and mother liquor.
Source: PVGPATDIS, file of 2026-04-10 (ipg111108.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| HPD, LLC 8 patents | US company or organization | Plainfield, IL | HPD, LLC State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Jean-Claude Gallot | Naperville, IL | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C02F | Treatment of water, waste water, sewage, or sludge | C02F9/00 | PVGPATDIS, file of 2026-04-10 |
| B01D | Separation | B01D1/0047 | PVGPATDIS, file of 2026-04-10 |
| C10J | Production of producer gas, water-gas, synthesis gas from solid carbonaceous material, or mixtures containing these gases ; carburetting air or other gases | C10J3/00 | PVGPATDIS, file of 2026-04-10 |
| Y02P | Climate change mitigation technologies in the production or processing of goods | Y02P20/129 | 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 |
|---|---|---|---|---|---|
| 2015-01-27 | Name change Change of name | VEOLIA WATER SOLUTIONS & TECHNOLOGIES NORTH AMERICA, INC. signed 2014-12-19 | VEOLIA WATER TECHNOLOGIES, INC. MOON TOWNSHIP, PA | 34817/530 | ECORSEXC, file of 2026-09-25 |
| 2013-01-10 | Assignment Assignment of assignor's interest | HPD, LLC signed 2012-12-28 | VEOLIA WATER SOLUTIONS & TECHNOLOGIES NORTH AMERICA, INC. MOON TOWNSHIP, PA | 29601/496 | ECORSEXC, file of 2026-09-25 |
| 2008-05-29 | Assignment Assignment of assignor's interest | GALLOT, JEAN-CLAUDE signed 2008-05-29 | HPD, LLC PLAINFIELD, IL | 21014/235 | 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.