Prepn process of strontium hydroxyapatite
A technology of strontium hydroxyapatite and strontium salt, applied in dental preparations, pharmaceutical formulas, dental prostheses, etc., can solve problems such as difficult degradation and unfavorable recovery of bone function
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example 1
[0026] Example 1: Add 4.5g strontium chloride, 2.1g calcium oxide to 500ml deionized water, add 1.5ml 85% ethylenediamine aqueous solution to form mixture A; add 2.75g ammonium dihydrogen phosphate to 100ml deionized water, Add 2.5ml of 85% aqueous solution of ethylenediamine to form mixture B. When both A and B are heated to 80°C, add solution B dropwise to solution A stirred at high speed, and adjust the pH value to 10.0 with 85% ethylenediamine. The dropwise addition was completed within 2 hours, stirred at a constant temperature of 70°C for 6 hours, and allowed to stand for 8 hours, the precipitate was filtered, washed, the pH value was about 7, dried at 110°C, and calcined at 750°C for 8 hours to obtain the product. The X-ray diffraction peak is obvious, and the purity of the finished product is average.
example 2
[0027] Example 2: 4.5g of strontium chloride, 3.1g of calcium chloride and 500ml of deionized water were made into a solution, and 1.4ml of n-butylamine was added to form compound A; 2.75g of ammonium dihydrogen phosphate was added to 100ml of deionized water, and stirred Dissolve, add 2.3ml n-butylamine to form solution B. When heating A and B to 80°C, stir A at a high speed and add B dropwise, and adjust the pH value to 9.0 with n-butylamine. The dropwise addition was completed within 1.5 hours, stirred at a constant temperature of 80°C for 8 hours, and allowed to stand for 12 hours, the precipitate was filtered, washed, the pH value was about 7, dried at 110°C, and calcined at 950°C for 4 hours to obtain the product. The X-ray diffraction peak is obvious, and the purity of the finished product is average.
example 3
[0028] Example 3: 5.0g strontium nitrate, 2.7g calcium chloride were added into 500ml deionized water to form a solution, and 1.5ml 85% hexamethylenediamine aqueous solution was added to form mixture A; 2.75g ammonium dihydrogen phosphate was added to 100ml deionized water To make a solution, add 2.5ml of 85% hexamethylenediamine aqueous solution to make mixture B. When heating A and B to 60°C, stir A at a high speed and add B dropwise, and adjust the pH value to 8.5 with hexamethylenediamine. The dropwise addition was completed within 2 hours, stirred at a constant temperature of 95°C for 10 hours, and allowed to stand for 24 hours, the precipitate was filtered, washed, the pH value was about 7, dried at 110°C, and calcined at 1000°C for 4 hours to obtain the product. The X-ray diffraction peaks are average, and the purity of the finished product is average.
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