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US4639362A
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Process for the production of magaldrate
Assignee: GILULINI CHEMIE GmbH
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Filing: 1985-03-05
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Granted: 1987-01-27
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Expires: 2005-03-05
Abstract
Abstract Novel process for the production of magaldrate by the reaction of active aluminum hydroxide with a water soluble, sulfate containing compound and active magnesium oxide and/or magnesium hydroxide in stoichiometric quantities in the presence of water.
Inventors
- 👤 Klaus Schanz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:12
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/02; C01F7/16; C01F7/68; C01F7/74; C01F7/76; A; A61; A61K; A61K33/00; A61K33/06; A61P; A61P1/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A process for producing magaldrate of the formula, Al.sub.5 Mg.sub.10 (OH).sub.31 (SO.sub.4).sub.2.×H.sub.2 O, comprising mixing an aqueous suspension of carbonate containing active aluminum hydroxide with an aluminum sulfate solution in stoichiometric quantities under intensive stirring; after the generation of carbon dioxide ceases, mixing in stoichiometric quantities of magnesium oxide having an iodine number between 20 and 100; and allowing the resulting mixture to stand for 10 to 24 hours without mixing to form magaldrate paste.
Claim 2
Dependent Claim
75 words
A process for producing magaldrate of the formula, Al.sub.5 Mg.sub.10 (OH).sub.31 (SO.sub.4).sub.2.×H.sub.2 O, comprising mixing an aqueous suspension of carbonate containing active aluminum hydroxide with an aluminum sulfate solution in stoichiometric quantities under intensive stirring; after the generation of carbon dioxide ceases, mixing in stoichiometric quantities of magnesium oxide having an iodine number between 20 and 100; and allowing the resulting mixture to stand for 10 to 24 hours without mixing to form magaldrate paste.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the magaldrate paste is dried directly, without filtration, washing or rehomogenization.
Claim 4
Dependent Claim
16 words
The process of claim 1, wherein the magaldrate paste is further processed to form magaldrate powder.
Claim 5
Dependent Claim
62 words
A process for producing magaldrate of the formula, Al.sub.5 Mg.sub.10 (OH).sub.31 (SO.sub.4).sub.2.×H.sub.2 O, comprising combining magnesium hydroxide with at least one water soluble sulfate containing compound in the presence of water and in stoichiometric quantities while stirring, thereafter adding stoichiometric quantities of active aluminum hydroxide while continuing to stir, and allowing the resulting mixture to stand without mixing to form magaldrate paste.
Claim 6
Dependent Claim
62 words
A process for producing magaldrate of the formula, Al.sub.5 Mg.sub.10 (OH).sub.31 (SO.sub.4).sub.2.×H.sub.2 O, comprising combining magnesium hydroxide with at least one water soluble sulfate containing compound in the presence of water and in stoichiometric quantities while stirring, thereafter adding stoichiometric quantities of active aluminum hydroxide while continuing to stir, and allowing the resulting mixture to stand without mixing to form magaldrate paste.
Claim 7
Dependent Claim
17 words
The process of claim 4, wherein the magaldrate paste is dried directly, without filtration, washing or rehomogenization.
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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) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |