Patent US2755960A successfully refreshed from Google Patents.
US2912306A
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US
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Method of producing magnesia and calcium nitrate from dolomite
Assignee: PAUL O TOBELER
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Filing: 1957-09-13
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Granted: 1959-11-10
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Expires: 1977-09-13
Abstract
No abstract record available.
Inventors
- 👤 Kippe Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:59
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/14; C01F5/16; C05; C05C; C05C5/00; C05C5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
THE PROCESS FOR PRODUCING LIE DEFICIENT MAGNESIA FROM DOLOMITE, THAT INCLUDES DRY SLAKING BURNED DOLOMITE WITH A DILUTE AQUEOUS SOLUTION OF CALCIUM NITRATE IN THE PROPORTIONS 40 TO 50 LITERS OF THE CALCIUM NITRATE SOLUTION TO 100 KILOGRAMS OF BURNED DOLOMITE TO PRODUCE HARD, DRY HYDRATE GRANULES CONTAINING HYDRATE LINE AND MAGNESIA, SAID BURNED DOLOMITE BEING SELECTED FROM THE GROUP CONSISTING OF CRYSTALINE AND AMORPHOUS BURNED DOLOMITE, SAID DILUTE AQUEOUS SOLUTION OF CALCIUM NITRATE HAVING A CONCENTRATION OF FROM 8 TO 12 PERCENT CALCIUM NITRATE, REACTING SAID DRY GRANULES WITH A MOTHER SOLUTION OF RAW DOLIMITE IN NITRIC ACID OT PRECIPITATE MAGNESIUM HYDROXIDE AN TO DISSOLVE THE LIME CONTENT OF AID GRANULES IN SIAD MOTHER SOLUTION, SAID RAW DOLOMITE BEING SELECTED FROM THE GROUP CONSISTING OF CRYSTALLINE AN AMORPHOUS RAW DOLOMITE, SEPARATING SAID PRECIPITATE FROM SAID MOTHER SOLUTION BY FILTRATION, AQUEOUSLY WASHING SAID PRECIPITATE, AND DRYING AND CALCINING SAID PRECIPITATE TO PRODUCE SAID MAGNESIA, SAID PRODUCT MAGNESIA HAVING LESS THAN 2.0% CALCIUM OXIDE CONTENT.
Claim 2
Dependent Claim
164 words
THE PROCESS FOR PRODUCING LIE DEFICIENT MAGNESIA FROM DOLOMITE, THAT INCLUDES DRY SLAKING BURNED DOLOMITE WITH A DILUTE AQUEOUS SOLUTION OF CALCIUM NITRATE IN THE PROPORTIONS 40 TO 50 LITERS OF THE CALCIUM NITRATE SOLUTION TO 100 KILOGRAMS OF BURNED DOLOMITE TO PRODUCE HARD, DRY HYDRATE GRANULES CONTAINING HYDRATE LINE AND MAGNESIA, SAID BURNED DOLOMITE BEING SELECTED FROM THE GROUP CONSISTING OF CRYSTALINE AND AMORPHOUS BURNED DOLOMITE, SAID DILUTE AQUEOUS SOLUTION OF CALCIUM NITRATE HAVING A CONCENTRATION OF FROM 8 TO 12 PERCENT CALCIUM NITRATE, REACTING SAID DRY GRANULES WITH A MOTHER SOLUTION OF RAW DOLIMITE IN NITRIC ACID OT PRECIPITATE MAGNESIUM HYDROXIDE AN TO DISSOLVE THE LIME CONTENT OF AID GRANULES IN SIAD MOTHER SOLUTION, SAID RAW DOLOMITE BEING SELECTED FROM THE GROUP CONSISTING OF CRYSTALLINE AN AMORPHOUS RAW DOLOMITE, SEPARATING SAID PRECIPITATE FROM SAID MOTHER SOLUTION BY FILTRATION, AQUEOUSLY WASHING SAID PRECIPITATE, AND DRYING AND CALCINING SAID PRECIPITATE TO PRODUCE SAID MAGNESIA, SAID PRODUCT MAGNESIA HAVING LESS THAN 2.0% CALCIUM OXIDE CONTENT.
References Cited (Backward Citations)
US1904946A
Cited
US1975954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |