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Preparation method for magnesium ammonium phosphate cement

A technology of magnesium ammonium phosphate cement and calcium phosphate, applied in the field of cement preparation, can solve the problem of difficulty in preparing a preparation method of magnesium ammonium phosphate cement, and achieve the effect of increasing added value

Inactive Publication Date: 2014-06-18
毛华军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But with regard to current preparation technology, it is difficult to prepare the preparation method of the magnesium ammonium phosphate cement that can industrialized application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Specific embodiment 1, a kind of preparation method of magnesium ammonium phosphate cement is characterized in that, comprises the steps:

[0012] After calcination, acidolysis and impurity removal, the magnesite is subjected to hydrothermal treatment, wherein the pH value in the hydrothermal reaction kettle is 11, and the hydrothermal temperature is controlled at 200°C to obtain nano-sized magnesium hydroxide;

[0013] The above-mentioned nano-scale magnesium hydroxide is heated and synthesized with lye and phosphoric acid at a temperature of 120° C. to finally obtain magnesium ammonium phosphate cement, which contains an appropriate amount of calcium phosphate in the heating kettle.

[0014] The lye is ammonia water.

specific Embodiment approach 2

[0015] Specific embodiment 2, a kind of preparation method of magnesium ammonium phosphate cement is characterized in that, comprises the steps:

[0016] After calcination, acidolysis and impurity removal, the magnesite is subjected to hydrothermal treatment, wherein the pH value in the hydrothermal reaction kettle is 13, and the hydrothermal temperature is controlled at 180°C to obtain nano-sized magnesium hydroxide;

[0017] The above-mentioned nano-scale magnesium hydroxide is heated and synthesized with lye and phosphoric acid at a temperature of 110° C. to finally obtain magnesium ammonium phosphate cement, which contains an appropriate amount of calcium phosphate in the heating kettle.

[0018] The lye is ammonia water.

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Abstract

The invention relates to a preparation method for magnesium ammonium phosphate cement. The method includes the steps of: subjecting magnesite to calcination, acidolysis and impurity removal, then conducting hydrothermal treatment, keeping the pH value in a hydrothermal reaction kettle at 11-14, and controlling the hydrothermal temperature at 180-200DEG C to prepare nanoscale magnesium hydroxide; and subjecting the nanoscale magnesium hydroxide, alkali liquor and phosphoric acid to heating synthesis reaction at 110-120DEG C, thus finally obtaining the magnesium ammonium phosphate cement. Specifically, a proper amount of calcium phosphate is contained in the heating kettle, and the alkali liquor is ammonia water. According to the invention, through rational use of magnesium ore, products able to replace bone materials can be artificially synthesized, and also the added value of magnesium ore is enhanced.

Description

technical field [0001] The invention relates to a preparation method of cement, in particular to a preparation method of magnesium ammonium phosphate cement. Background technique [0002] Magnesium Ammonium Phosphate (MgNH 4 PO 4 ) The stable form is magnesium ammonium phosphate hexahydrate (MgNH 4 PO 4 ·6H 2 O) and magnesium ammonium phosphate monohydrate (MgNH 4 PO 4 ·H 2 O) Two kinds. The same technique in the preparation can prepare MgNH 4 PO 4 ·6H 2 O can in turn produce MgNH 4 PO 4 ·H 2 O, the difference is that the temperature used is different, and MgNH is generated under higher temperature conditions 4 PO 4 ·H 2 O, MgNH is generated under the conditions of lower temperature and the presence of a large amount of water in the reactant 4 PO 4 ·6H 2 O. The preparation method of magnesium ammonium phosphate cement is used in bone replacement, bone enhancement, and bone regeneration, as an auxiliary material for medicine or bioactive components, and mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02
Inventor 毛华军
Owner 毛华军