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Preparation method of polycondensing lead phosphate and detection method thereof

A technology of condensed phosphoric acid and detection method, which is applied in the fields of chemical instruments and methods, phosphorus compounds, chemical analysis by titration method, etc., and can solve the problems such as no report of lead phosphate

Inactive Publication Date: 2006-10-11
蒋建军
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  • Application Information

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Problems solved by technology

[0002] Lead salt is a heat stabilizer that is widely used in industry, but the existing lead salts mainly include lead nitrate, dibasic lead phosphite, etc., and there is no report of lead phosphate

Method used

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  • Preparation method of polycondensing lead phosphate and detection method thereof

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Embodiment 1

[0009] Example 1: Phosphoric acid and lead oxide are formulated in a molar ratio of 2:1, water-cooled and cooled for polymerization, left to mature, then subjected to high-temperature condensation reaction at 300-350°C for 2-4 hours, cooled, crushed, and passed through a 200-mesh sieve. . The polycondensed lead phosphate produced by the present invention is white powder, wherein Pb(PO3) 2 .1 / 2H 2 The content of O is 98%. The determination of the content adopts nitric acid to dissolve the sample, adjust the pH value with ammonia water, add ammonium acetate and hexamethylenetetramine, and use xylenol orange as an indicator agent, and titrate with EDTA standard solution. Take 0.5 g of polycondensed lead phosphate and dissolve it in 100 ml of water, and measure the pH value to be 2.8-2.9. Measured with X-ray diffractometer, the index of its strongest peak X-ray diffraction angle 2θ (degree) is 11.352, see accompanying drawing. The particle size of the polycondensed lead phospha...

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Abstract

The invention discloses a preparation method of polycondensing lead phosphate and detection method which comprises the following steps: mixing phosphoric acid and lead monoxide by a molar ratio of 2:1, carrying out water-cooling temperature drop polymerization reaction, depositing and curing, carrying out high temperature condensation reaction 2-4 hours at 300-350 deg C, and finally cooling down.

Description

technical field [0001] The invention relates to a production method and detection method of polycondensed lead phosphate. Background technique [0002] Lead salt is a heat stabilizer that is widely used in industry, but the existing lead salts mainly include lead nitrate, lead dibasic phosphite, etc., and there is no report of lead phosphate. Contents of the invention [0003] The object of the present invention provides a kind of production method and detection method of polycondensed lead phosphate. [0004] The production method of the condensed lead phosphate: phosphoric acid and lead oxide in a molar ratio of 2: 1, water-cooled and cooled for polymerization, left to mature, then subjected to high-temperature condensation reaction at 300-350°C for 2-4 hours, and cooled. [0005] The detection method of the condensed lead phosphate of above-mentioned production comprises the following steps: adopt nitric acid to dissolve sample, adjust pH value with ammonia water, add ...

Claims

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Application Information

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IPC IPC(8): C01B25/37G01N31/16G01N23/20
Inventor 蒋建军
Owner 蒋建军