Patent US4539195A successfully refreshed from Google Patents.
US4539195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic magnesium aluminum hydroxycarbonate
Assignee: BK Giulini GmbH
•
Filing: 1984-02-23
•
Granted: 1985-09-03
•
Expires: 2004-02-23
Abstract
Abstract Crystalline, basic magnesium aluminum hydroxycarbonate of the formula Al2Mg6(OH)12(CO3)3.xH2O where x is at least 4. A process for producing it comprises the conversion of aluminum hydroxide with basic magnesium carbonate and at least one compound selected from magnesium hydroxide and magnesium oxide. Stoichiometric quantities are employed with reference to the aluminum and the magnesium. The conversion takes place at temperatures from 50 DEG to 100 DEG C., and the resulting product is subsequently spray dried.
Inventors
- 👤 Klaus Schanz
- 👤 Albert Schwind
- 👤 Hartmut Grund
- 👤 Peter Klehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:35
CPC Classifications
A; A61; A61K; A61K33/00; A61K33/06; A61K33/10; A61P; A61P1/00; A61P1/04; C; C01; C01F; C01F7/00; C01F7/78; C01F7/784; C01F7/785; C01P; C01P2002/00; C01P2002/20; C01P2002/22; C01P2002/70; C01P2002/72
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
Crystalline, basic aluminum magnesium carbonate of the formula Al.sub.2 Mg.sub.6 (OH).sub.12 (CO.sub.3).sub.3.xH.sub.2 O where x is at least 4.
Claim 2
Dependent Claim
19 words
Crystalline, basic aluminum magnesium carbonate of the formula Al.sub.2 Mg.sub.6 (OH).sub.12 (CO.sub.3).sub.3.xH.sub.2 O where x is at least 4.
Claim 3
Dependent Claim
13 words
An antacid containing the crystalline, basic aluminum magnesium carbonate defined in claim 1.
Claim 4
Dependent Claim
149 words
Process for producing a basic aluminum magnesium carbonate of the formula Al.sub.2 Mg.sub.6 (OH).sub.12 (CO.sub.3).sub.3.xH.sub.2 O where x is at least 4 comprising: mixing together in an aqueous suspension active aluminum hydroxide, basic magnesium carbonate and at least one compound selected from magnesium hydroxide and active magnesium oxide, in stoichiometric quantities with respect to the aluminum and the magnesium, wherein the magnesium oxide provided by the basic magnesium carbonate is between 44 and 70 weight percent of the total magnesium oxide, converting the active aluminum hydroxide, basic magnesium carbonate and the compound or compounds selected from magnesium hydroxide and active magnesium oxide to the basic aluminum magnesium carbonate at temperatures from 50° to 100° C. under the influence of shearing forces, and directly recovering the resulting product having the formula Al 2 Mg 6 (OH) 12 (CO 3 ) 3 .xH 2 O from the suspension by spray drying.
Claim 5
Dependent Claim
149 words
Process for producing a basic aluminum magnesium carbonate of the formula Al.sub.2 Mg.sub.6 (OH).sub.12 (CO.sub.3).sub.3.xH.sub.2 O where x is at least 4 comprising: mixing together in an aqueous suspension active aluminum hydroxide, basic magnesium carbonate and at least one compound selected from magnesium hydroxide and active magnesium oxide, in stoichiometric quantities with respect to the aluminum and the magnesium, wherein the magnesium oxide provided by the basic magnesium carbonate is between 44 and 70 weight percent of the total magnesium oxide, converting the active aluminum hydroxide, basic magnesium carbonate and the compound or compounds selected from magnesium hydroxide and active magnesium oxide to the basic aluminum magnesium carbonate at temperatures from 50° to 100° C. under the influence of shearing forces, and directly recovering the resulting product having the formula Al 2 Mg 6 (OH) 12 (CO 3 ) 3 .xH 2 O from the suspension by spray drying.
Claim 6
Dependent Claim
23 words
Process as defined in claim 3, wherein the aluminum hydroxide is converted with a mixture of a basic magnesium carbonate and magnesium oxide.
Claim 7
Dependent Claim
22 words
Process as defined in claim 3, wherein the aluminum hydroxide is converted with a mixture of basic magnesium carbonate and magnesium hydroxide.
Claim 8
Dependent Claim
19 words
Process as defined in claim 3, wherein the conversion is performed at a temperature from 70° to 85° C.
Claim 9
Dependent Claim
19 words
Process as defined in claim 3, wherein the aluminum hydroxide is in the form of amorphous aluminum hydroxide gel.
References Cited (Backward Citations)
US2797978A
Cited
GB1086779A
Cited
FR1532167A
Cited
GB1185920A
Cited
DE1592126A1
Cited
US3857938A
Cited
JPS5030039A
Cited
DE2905256A1
Cited
GB1598375A
Cited
US4447417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |