US3644102A
Expired / Lapsed
US
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Crystallization of potassium chloride from carnallite decomposition
Assignee: Struthers Scientific and International Corp
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Filing: 1967-11-30
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Granted: 1972-02-22
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Expires: 1987-11-30
Abstract
Abstract Carnallite is decomposed by adding it to water under optimum conditions so that potassium chloride may be crystallized therefrom using potassium chloride seed crystals of over 60 mesh size.
Inventors
- 👤 Hans Svanoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:58
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/04; C01D3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
The process according to claim 1 wherein carnallite is decomposed by water in the mother liquor maintained at a temperature of about 25* C.
Claim 2
Dependent Claim
55 words
The process according to claim 2 with the additional steps of: f. concentrating by evaporation at about 50* C. the mother liquor from which the potassium chloride crystals are separated to grow carnallite crystals therein; and g. separating the crystallized carnallite from the concentrated mother liquor for recycling into the process in step (c) above.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |