Patent US2550708A successfully refreshed from Google Patents.
US2550708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of silica from alkaline carbonate brines
Assignee: Individual
•
Filing: 1944-09-06
•
Granted: 1951-05-01
•
Expires: 1964-09-06
Abstract
No abstract record available.
Inventors
- 👤 Meyer Edmond Gerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:24
CPC Classifications
C; C01; C01D; C01D7/00; C01D7/22; C01D7/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A CYCLIC PROCESS FOR THE REMOVAL OF SILICA FROM AN ALKALI METAL CARBONATE SOLUTION CON TAINING DISSOLVED SILICA, WHICH COMPRISES BRINGING HYDROMAGNESITE INTO INTIMATE CONTACT WITH SUCH A SOLUTION, THEN SEPARATING AND RECOVERING AN ALKALI METAL CARBONATE SOLUTION OF DIMINSHED SILICA CONTENT, AND A SOLID, RESIDUE COMPRISING HYDROMAGNESITE AND ADSORBED SILICA, THEN TREATING THE SOLID RESIDUE WITH AN ACID WHICH FORMS SOLUBLE MAGNESIUM SALTS, TO FORM A MAGNESIUM SALT SOLUTION, SEPARATING THE LIBERATED SILICA, THEN MIXING THE SAID MAGNESIUM SALT SOLUTION WITH RECOVERED ALKALI METAL CARBONATE SOLUTION TO PRECIPITATE ADDITIONAL HYDROMAGNESITE, AND SEPARATING THE FORMED HYDROMAGNESITE AND RETURNING IT FOR REMOVAL OF FURTHER QUANTITIES OF SILICA AS BEFORE.
Claim 2
Dependent Claim
108 words
A CYCLIC PROCESS FOR THE REMOVAL OF SILICA FROM AN ALKALI METAL CARBONATE SOLUTION CON TAINING DISSOLVED SILICA, WHICH COMPRISES BRINGING HYDROMAGNESITE INTO INTIMATE CONTACT WITH SUCH A SOLUTION, THEN SEPARATING AND RECOVERING AN ALKALI METAL CARBONATE SOLUTION OF DIMINSHED SILICA CONTENT, AND A SOLID, RESIDUE COMPRISING HYDROMAGNESITE AND ADSORBED SILICA, THEN TREATING THE SOLID RESIDUE WITH AN ACID WHICH FORMS SOLUBLE MAGNESIUM SALTS, TO FORM A MAGNESIUM SALT SOLUTION, SEPARATING THE LIBERATED SILICA, THEN MIXING THE SAID MAGNESIUM SALT SOLUTION WITH RECOVERED ALKALI METAL CARBONATE SOLUTION TO PRECIPITATE ADDITIONAL HYDROMAGNESITE, AND SEPARATING THE FORMED HYDROMAGNESITE AND RETURNING IT FOR REMOVAL OF FURTHER QUANTITIES OF SILICA AS BEFORE.
References Cited (Backward Citations)
US968669A
Cited
US1400542A
Cited
US1584716A
Cited
US1751955A
Cited
US1598254A
Cited
US1959346A
Cited
US1984342A
Cited
US1992532A
Cited
US2034996A
Cited
US2057414A
Cited
US2143069A
Cited
US2347053A
Cited
US2287856A
Cited
US2346140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |