Patents
US 8802048 B2: Methods of processing solutions of potassium sulfate and magnesium sulfate, methods of producing potassium sulfate, and related systems
- Granted
- 2014-08-12
- Filed
- 2013-09-10 application 14023347
- Type
- Utility · 23 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Methods of processing an aqueous solution comprising potassium sulfate and magnesium sulfate include crystallizing K2SO4, crystallizing recycle crystals, and mixing at least a portion of the recycle crystals with the aqueous solution. Systems for processing potassium sulfate and magnesium sulfate include a first crystallizer and a second crystallizer in fluid communication with the second mix tank. The second crystallizer is structured and adapted to precipitate recycle crystals from the concentrated liquor to form a potassium-depleted recycle brine. The recycle crystals precipitated in the second crystallizer have a composition suitable to be recycled to the first crystallizer to increase the production of SOP.
Source: PVGPATDIS, file of 2026-04-10 (ipg140812.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| INTERCONTINENTAL POTASH CORP. (USA) 3 patents | US company or organization | Hobbs, NM | Intercontinental Potash Corp. (USA) Form D issuer EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Steven L. Chastain | Wichita, KS | 2 | PVGPATDIS, file of 2026-04-10 | |
| Michael Morrison | Golden, CO | 9 | PVGPATDIS, file of 2026-04-10 | |
| Richard W. Chastain | Carlsbad, NM | 6 | PVGPATDIS, file of 2026-04-10 | |
| Donial M. Felton | Carlsbad, NM | 3 | PVGPATDIS, file of 2026-04-10 | |
| Thomas H. Neuman | Salt Lake City, UT | 4 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C01D | Compounds of alkali metals, i.e. lithium, sodium, potassium, rubidium, caesium, or francium | C01D5/12 | PVGPATDIS, file of 2026-04-10 |
| B01D | Separation | B01D9/0036 | 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 |
|---|---|---|---|---|---|
| 2013-09-11 | Assignment Assignment of assignor's interest | FELTON, DONIAL M. signed 2013-08-16 CHASTAIN, RICHARD W. signed 2013-08-23 MORRISON, MICHAEL J. signed 2013-09-06 CHASTAIN, STEVEN L. signed 2013-09-09 NEUMAN, THOMAS H. signed 2013-09-09 | INTERCONTINENTAL POTASH CORP. (USA) HOBBS, NM | 31181/518 | 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.