| 摘要 |
PURPOSE:To obtain the subject inexpensive composition capable of being easily ingested, excellent in absorbability into bodies and useful for the prevention of osteoporosis, etc., by adding water to the mixture of calcined calcium oxide powder with specific shell powder at a specified temperature. CONSTITUTION:This composition is obtained by mixing (A) 40-95 pts. of calcined calcium oxide powder with (B) 60-5 pts. of shell fine powder and subsequently adding water to the mixture at 90-300 deg.C under sufficient stirring. The shell fine powder is prepared by thermally treating oyster shell or scallop shell at the ordinary temperature to 40 deg.C and subsequently mechanically grinding the treated shell. The water is added in an amount which is an equivalent or more to that of the component A and which is sufficient for converting the whole amount of the component A into calcium hydroxide while keeping the temperature at 90-300 deg.C. This composition is preferably further reacted with carbon dioxide in an amount sufficient for converting >=60% of the calcium hydroxide in the obtained calcium composition into calcium carbonate. The component A is prepared by calcining the oyster shell or the scallop shell. |
