US3294485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing magnesium hydroxide and a noncontaminated effluent solution
Assignee: Dow Chemical Co
•
Filing: 1963-12-12
•
Granted: 1966-12-27
•
Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Raymond P Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/14; C01F5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A METHOD OF PRODUCING MAGNESIUM HYDROXIDE AND A NON-CONTAMINATED CALCIUM CHLORIDE EFFLUENT SOLUTION FROM AN AQUEOUS SOLUTION CONTAINING MAGNESIUM CHLORIDE, THE STEPS WHICH COMPRISES, SLAKING A FORM OF QUICK LIME SELECTED FROM THE GROUP CONSISTING OF CALCINED LIME AND DOLIME, REACTING SAID SLAKED LIME IN A FIRST STAGE PRECIPITATION WITH SAID AQUEOUS SOLUTION CONTAINING MAGNESIUM CHLORIDE IN AN AMOUNT SUCH THAT A SLIGHT EXCESS OF CA(OH)2 IS MAINTAINED CORRESPONDING TO A SOLUBLE ALKALINITY OF FROM ABOUT 4 TO 6 MLS., THEREBY FORMING A SUSPENSION COMPRISING MAGNESIUM HYDROXIDE AS A FIRST STAGE PRECIPITATE IN A SOLUTION CONTAINING CALCIUM CHLORIDE AND RESIDUAL UNPRECIPITATED MAGNESIUM VALUES, TREATING THE SUSPENSION SO-PRODUCED IN A SECOND
Claim 2
Dependent Claim
111 words
IN A METHOD OF PRODUCING MAGNESIUM HYDROXIDE AND A NON-CONTAMINATED CALCIUM CHLORIDE EFFLUENT SOLUTION FROM AN AQUEOUS SOLUTION CONTAINING MAGNESIUM CHLORIDE, THE STEPS WHICH COMPRISES, SLAKING A FORM OF QUICK LIME SELECTED FROM THE GROUP CONSISTING OF CALCINED LIME AND DOLIME, REACTING SAID SLAKED LIME IN A FIRST STAGE PRECIPITATION WITH SAID AQUEOUS SOLUTION CONTAINING MAGNESIUM CHLORIDE IN AN AMOUNT SUCH THAT A SLIGHT EXCESS OF CA(OH)2 IS MAINTAINED CORRESPONDING TO A SOLUBLE ALKALINITY OF FROM ABOUT 4 TO 6 MLS., THEREBY FORMING A SUSPENSION COMPRISING MAGNESIUM HYDROXIDE AS A FIRST STAGE PRECIPITATE IN A SOLUTION CONTAINING CALCIUM CHLORIDE AND RESIDUAL UNPRECIPITATED MAGNESIUM VALUES, TREATING THE SUSPENSION SO-PRODUCED IN A SECOND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |