A kind of preparation method of high-purity optical glass additive copper metaphosphate

A copper metaphosphate and optical glass technology, applied in chemical instruments and methods, inorganic chemistry, phosphorus compounds, etc., can solve the problem that the purity of copper metaphosphate is difficult to meet the preparation requirements of infrared cut-off filters, achieve high yield, avoid The effect of high recovery rate of by-products and mother liquor

Active Publication Date: 2020-09-25
刘鹏
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Problems solved by technology

[0004] In order to solve the technical problem that the purity of copper metaphosphate produced by existing preparation methods is difficult to meet the preparation requirements of infrared cut-off filters, the invention provides a method for preparing high-purity optical glass additive copper metaphosphate

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  • A kind of preparation method of high-purity optical glass additive copper metaphosphate

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Embodiment 1

[0057] Preparation method of high-purity optical glass additive copper metaphosphate:

[0058] Step 1, purifying copper sulfate raw material:

[0059] 1.1) Take industrial-grade copper sulfate raw materials and place them in an enamel reaction kettle, add deionized water and heat to 80°C to dissolve copper sulfate until the specific gravity of the copper sulfate solution is 1.12 (if the specific gravity is too large, it is not conducive to the adsorption and co-precipitation of Fe, Ni, Cr , Co, Mn, Ti, V, Pb), lower the temperature below 35°C, add hydrogen peroxide (the volume ratio of hydrogen peroxide to copper sulfate solution is 3:1500), stir evenly, let stand for 30 minutes, and dissolve the copper sulfate solution The ferrous ions in the solution are oxidized to ferric ions, adding a 10% barium hydroxide solution, adjusting the pH value to 3.5, stirring fully, and standing for 4 hours;

[0060] 1.2) Filter the solution obtained in step 1.1) into another container, add h...

Embodiment 2

[0082] Preparation method of high-purity optical glass additive copper metaphosphate:

[0083] Step 1, purifying copper sulfate raw material:

[0084]1.1) Take industrial-grade copper sulfate raw materials and place them in an enamel reaction kettle, add deionized water and heat to 90°C to dissolve copper sulfate until the specific gravity of the copper sulfate solution is 1.1, lower the temperature to below 35°C, add a small amount of hydrogen peroxide (hydrogen peroxide and The volume ratio of the copper sulfate solution is 1:1000), after stirring evenly, after standing for 40 minutes, adding a barium hydroxide solution with a concentration of 12%, adjusting the pH value to 4.2, stirring fully, and standing for 4 hours;

[0085] 1.2) Filter the solution obtained in step 1.1) into another container, add high-purity reagent sulfuric acid, adjust the pH value to 3, heat and concentrate the solution to a specific gravity of 1.3, and then remove the head and filter into another c...

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Abstract

In order to solve the technical problem that the purity of copper metaphosphate produced by existing preparation methods cannot meet the preparation requirements of an infrared cut-off filter, the invention provides a preparation method of copper metaphosphate as a high-purity optical glass additive. The preparation method comprises the following steps:1, purifying copper sulfate material; 2, purifying sodium carbonate material; 3, synthesizing copper carbonate; 4, synthesizing copper dihydrogen phosphate; and 5, synthesizing copper metaphosphate. The purity of copper metaphosphate prepared bythe method can reach more than 99.95% and the highest purity can be up to 99.99%, and the content of metallic impurities such as Fe, Ni, Cr, Co, Mn, Ti, V and Pb is all less than 1.5 ppm.

Description

technical field [0001] The invention relates to a high-purity copper metaphosphate (Cu(PO 3 ) 2 ) preparation method for additives in infrared cut filter glass. Background technique [0002] CCD and CMOS photosensitive chip components have different photosensitive spectral ranges from that of human eyes. Therefore, infrared light that cannot be recognized by human eyes will interfere with the imaging quality of CCD and CMOS photosensitive chip components. By adding an infrared cut filter to the imaging system to block the part of the infrared light that interferes with the imaging quality, the imaging can be more in line with the best feeling of the human eye. [0003] As the main additive component of infrared cut-off filter, copper metaphosphate has very high requirements on purity and metal impurity content. At the ppm level, the existing preparation methods are difficult to meet this requirement. Contents of the invention [0004] In order to solve the technical pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/44C03C1/00
CPCC01B25/44C01P2006/80C03C1/00
Inventor 刘鹏俞小瑞王江哲刘明钢
Owner 刘鹏
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