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Magnesium metaphosphorate production process

A production process and technology of magnesium metaphosphate, applied in the directions of phosphorus compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of complex production process, high cost, low yield, etc., and achieve simple production process, low cost, and yield. high effect

Inactive Publication Date: 2006-07-12
SHANXI SUPERNEW METAL MATERIAL
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AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of production technique of magnesium metaphosphate, which solves the technical problems of complicated production technique, high cost and low yield in the background art

Method used

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  • Magnesium metaphosphorate production process
  • Magnesium metaphosphorate production process
  • Magnesium metaphosphorate production process

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Embodiment Construction

[0022] Production technology principle of the present invention is as follows:

[0023] 1. Convert MgO to 4MgCO 3 ·Mg(OH) 2 ·5H 2 O and H 3 PO 4 react to form water-soluble Mg(H 2 PO 4 ) 3 ·nH 2 O. The chemical reaction formula is as follows:

[0024]

[0025] 2. The water-soluble Mg(H 2 PO 4 ) 3 ·nH 2 O in less excess H 3 PO 4 In the presence of high-temperature spray drying, the extramolecular crystal water will be lost first, and anhydrous Mg(H 2 PO 4 ) 2 . The chemical reaction formula is as follows:

[0026]

[0027] 3. Remove the "constituent water" in the molecule. The chemical reaction formula is as follows:

[0028]

[0029] 4. The [Mg(PO 3 ) 2 ] n . The chemical reaction formula is as follows:

[0030]

[0031] Wherein n=3~6.

[0032] Concrete production technique of the present invention is as follows:

[0033] 1. Take the raw material MgO or 4MgCO 3 ·Mg(OH) 2 ·5H 2 O, placed in a 1500L stainless steel react...

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Abstract

The invention discloses a manufacturing technology of magnesium metaphosphate, which comprises the following steps: putting the raw material of MgO or 4MgCO3íñMg (OH) 2íñ5H2O in the autoclave to stir with the deionized water; heating; adding 85-98 percent H3PO4 to make raw material dissolve completely and pH value at 2.5-3 (approaching 3); shifting in the extractor after diluting and cooling; adding dense HCL; mixing the C12H27O4P and 80# petrol to extract; immigrating the water-liquid into reacting container; removing the HCL by heating; filtering; heating the autoclave to concentrate the Mg(H2PO4)3 content ranged from 55 to 60 percent; shifting the material in the spray drying tower to compress into magnesium metaphosphate after filtering. The invention simplifies the manufacturing technology and reduces the cost, which improves the production rate by more than 99 percent.

Description

technical field [0001] The invention relates to a production process of magnesium metaphosphate, in particular to a production process of low-transition metal element magnesium metaphosphate for special optical glass. Background technique [0002] At present, the production of magnesium metaphosphate is mainly obtained by calcining magnesium dihydrogen phosphate in a high-temperature furnace. The main defect of adopting this method is that the production process is complicated, the cost is high, and the production efficiency is low. During production, the crystallization of magnesium dihydrogen phosphate is produced first. Because the crystallization operation conditions of magnesium dihydrogen phosphate are difficult to control, it is difficult to guarantee the degree of polymerization during high-temperature calcination, and the deviation of the degree of polymerization is relatively large, resulting in unstable product quality; repeated calcination is required to obtain ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/44
Inventor 邱志明邱雯刘明钢
Owner SHANXI SUPERNEW METAL MATERIAL
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