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Preparation method of hydroxyapatite

A technology of hydroxyapatite and hydrogen phosphate, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of high cost and high equipment requirements, and achieve low preparation costs, simple preparation methods, and wide sources Effect

Inactive Publication Date: 2005-06-29
NINGBO ECONOMIC & TECH DEV ZONE JINGGE NEW MATERIAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method requires high equipment, and the cost is also very high

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] Weigh 16 grams of mussel shell powder and 22 grams of chemically pure ammonium dihydrogen phosphate, mix them with 800 ml of deionized water and pour them into a 1-liter flask, stir and react in a water bath at 90 degrees Celsius for 48 hours, filter and wash them in It is dried in a 90-degree oven to obtain hydroxyapatite with a purity of 94.6% and a size of 50-150 microns.

Embodiment 2

[0028] Weigh 20 grams of Donghai mussel powder and 25 grams of industrial grade sodium dihydrogen phosphate, mix with 1000 ml of deionized water, pour into a 1 liter flask, stir and react in a water bath at 97-98 degrees Celsius for 27 hours, filter and wash After drying in a 90 degree oven, hydroxyapatite with a purity of 88.3% and a size of 40-100 microns is obtained.

Embodiment 3

[0030] Weigh 16 grams of clam shell powder, 12.68 grams of chemically pure ammonium dihydrogen phosphate, and 15.0 grams of chemically pure diammonium phosphate, mix with 800 ml of deionized water and pour into a 1-liter flask, and stir to react in a water bath at 105 degrees. After 6 hours, filtered, washed, and dried in an oven at 90 degrees Celsius to obtain hydroxyapatite with a purity of 97.8% and a size of 20-40 nanometers.

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Abstract

The invention is preparation of hydroxyl group apatite at middle and low temperature direct by conch one step process. The invention uses the conch powder as rough material mixed with hydrogen sulfate solution and pyrolyzes 6 to 48 hours at temperature of 90 to 105 deg C. After the reaction collate and dry to obtain the hydroxyl group apatite powder. The rough material shell in the invention has a broad source and low price. The preparation is very simple which is just one step to convert shell directly to hydroxyl group apatite so to greatly lower the prepare cost of the hydroxyl group apatite.

Description

Technical field [0001] The present invention relates to a method for synthesizing hydroxyapatite, in particular to a method for directly synthesizing hydroxyapatite from shells by one-step low-temperature hydrothermal method, which belongs to the field of inorganic synthesis. Background technique [0002] There are many preparation methods of hydroxyapatite (HAP), which can be roughly divided into three categories: dry method (solid phase reaction method), hydrothermal method and wet method (solution reaction method). [0003] 1) Dry method (solid phase reaction method) [0004] Currently the usual method is Ca 3 (PO 4 ) 2 Or CaCO 3 And Ca 4 P 2 O 9 Pass water vapor at a high temperature of 1200℃, and synthesize HAP through solid-phase reaction. The temperature of the reaction must be controlled, because at the sintering temperature of 1200°C, the crystal phase of the reaction product is HAP; and at the sintering temperature of 1250°C, the crystal phase is a mixture of HAP and TC...

Claims

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Application Information

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IPC IPC(8): C01B25/32
Inventor 侯小宝谢田甜刘志信夏志军
Owner NINGBO ECONOMIC & TECH DEV ZONE JINGGE NEW MATERIAL DEV
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