Process for preparing oral calcium compositions
A process for the preparation of an orally administrable calcium composition comprising the steps of: (i) obtaining a physiologically tolerable particulate calcium compound having a mean particle size in the range of 3 to 40 μm, having a crystalline structure and having a surface area of 0.1 to 1.2 m 2 /g; (ii) mixing the calcium compound with a water-soluble diluent and an aqueous solution of a water soluble binder in a fluid bed granulation apparatus and dying the resulting mixture to produce a first granulate; (iii) optionally mixing the first granulate with one or more further components to produce a second granulate; and (iv) optionally compressing the first or second granulate to form tablets.
1. A process for the preparation of an orally administrable calcium composition, said process comprising the steps of:
(i) obtaining a physiologically tolerable particulate calcium compound having a mean particle size in the range 3 to 40 μm, having a crystalline structure and having a surface area of 0.1 to 1.2 m 2 /g;
(ii) mixing said calcium compound with a water-soluble diluent and a water soluble binder in a fluid bed granulation apparatus and drying the resulting mixture to produce a first granulate, wherein said water-soluble diluent comprises at least one sweetener selected from the group consisting of sorbitol, xylitol, isomalt and mannitol, and wherein said first granulate has a particle size distribution of D(V,0.1=15-21 μm, D(V,0.5)=70-120 μm and D(V,0.9)=190-330 μm;
(iii) optionally mixing said first granulate with one or more further components to produce a second granulate; and
(iv) optionally compressing said first or second granulate to form tablets.
2. The process of claim 1 wherein said calcium compound is selected from the group consisting of calcium carbonate, calcium lactate, calcium gluconate, calcium citrate, calcium glycerophosphate, calcium phosphate, calcium hydrogen phosphate, calcium glucuronate, calcium aspartate, calcium glucoheptonate and mixtures of two or more thereof.
3. The process of claim 1 wherein said calcium compound is calcium carbonate.
4. The process of claim 1 wherein said calcium compound makes up 68 to 80% wt. of said first granulate.
5. The process of claim 1 wherein said calcium compound makes up 60 to 95% wt. of said second granulate.
6. The process of claim 1 wherein in step (i) the same material is used as said diluent and as said binder.
7. The process of claim 1 wherein said water-soluble diluent makes up 70 to 96% wt. of the total weight of said water-soluble diluent and said water-soluble binder in said first granulate.
8. The process of claim 1 wherein said water-soluble binder is selected from the group consisting of celluloses, polysaccharides, maltodextrin, inulin and polyvinylpyrrolidone.
9. The process of claim 1 wherein said water-soluble binder is a polyvinylpyrrolidone.
10. The process of claim 1 wherein said one or more further components are mixed with said first granulate, and wherein said one or more further components are selected from the group consisting of vitamin B 6 , vitamin K, vitamin C, vitamin D, isoflavones, inulin, oligofructose and mixtures of two or more thereof.
11. The process of claim 1 wherein in step (ii) said calcium compound is also mixed with isoflavones.
12. A granulate comprising a fluid bed granulation granulate product of a physiologically tolerable calcium compound, a water-soluble binder and a water-soluble diluent, wherein said calcium compound has a mean particle size in the range 3 to 40 μm, has a crystalline structure and has a surface area of 0.1 to 1.2 m 2 /g; wherein said water-soluble diluent comprises at least one sweetener selected from the group consisting of sorbitol, xylitol, isomalt and mannitol, and wherein said granulate has a particle size distribution of D(V,0.1=15-21 μm, D(V,0.5)=70-120 μm and D(V,0.9)=190-330 μm.
13. The granulate of claim 12 wherein said granulate further comprises a lubricant.
14. The granulate of claim 12 wherein said calcium compound is selected from the group consisting of calcium carbonate, calcium lactate, calcium gluconate, calcium citrate, calcium glycerophosphate, calcium phosphate, calcium hydrogen phosphate, calcium glucuronate, calcium aspartate, calcium glucoheptonate and mixtures of two or more thereof.
15. The granulate of claim 12 wherein said water-soluble binder is selected from the group consisting of celluloses, polysaccharides, maltodextrin, inulin and polyvinylpyrrolidone.
16. The granulate of claim 12 wherein said granulate further comprises a component selected from the group consisting of vitamin B 6 , vitamin K, vitamin C, vitamin D, isoflavones, inulin, oligofructose and mixtures of two or more thereof.