Claims
- 1. A process for the preparation of an antacid material based upon magnesium aluminum hydroxide, substantially free of sodium and carbonate ions, which comprises reacting a magnesium compound selected from the group of magnesium hydroxide, magnesium oxide, or mixtures thereof in an atomic ratio of magnesium to aluminum of 1:1 to 3:1 with an aqueous solution of aluminum sulphate until the pH of the reaction mixtures is from 4.0 to 8.01, then removing water-soluble components from the mixture and, isolating said antacid material.
- 2. A process according to claim 1, wherein the starting materials are used in an atomic ratio of magnesium to aluminium of 1.3:1 to 2:1.
- 3. A process according to claim 1 wherein the reaction is terminated when the pH of the reaction mixture is from 5.0 to 7.0.
- 4. A process according to claim 1 wherein the reaction is carried out at a temperature which does not exceed 60.degree. C.
- 5. A process according to claim 2 wherein the reaction is terminated when the pH of the reaction mixture is from 5.0 to 7.0.
- 6. A process according to claim 5 wherein the reaction is carried out at a temperature which does not exceed 60.degree. C.
- 7. A process according to claim 2 wherein the reaction is carried out at a temperature which does not exceed 60.degree. C.
- 8. A process according to claim 3 wherein the reaction is carried out at a temperature which does not exceed 60.degree. C.
- 9. The process of claim 1 which further comprises drying said antacid material and wherein said antacid material is free of sodium and carbonate ions.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3019032 |
May 1980 |
DEX |
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Parent Case Info
This is a continuation of Application Ser. No. 260,859, filed May 6, 1981 which is abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3857938 |
Rovati et al. |
Dec 1979 |
|
4105579 |
Glasscock |
Aug 1978 |
|
Non-Patent Literature Citations (1)
Entry |
Chemical Abstracts, 83 84853e, 1975. |
Continuations (1)
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Number |
Date |
Country |
Parent |
260859 |
May 1981 |
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