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Nano-grade boron phosphate rapid preparation method with microwave radiation low-temperature solid-phase reaction method

A technology of boron phosphate and microwave devices, which is applied in the direction of nanotechnology, boron compounds, chemical instruments and methods, etc., can solve the problems of high energy consumption, high price and complexity of boron phosphate, and achieve no material loss, simple production process, The effect of reducing production costs

Inactive Publication Date: 2012-10-31
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the problem of high energy consumption
[0007] CN101302014A "The production method of superfine boron phosphate" takes boric acid and phosphoric acid as raw materials and heats reflux reaction in an organic solvent, and prepares boron phosphate through processes such as distillation, solvent removal, and drying treatment. The organic solvent used in the method is benzene, toluene and Large dosage, problems such as aromatics pollution and complicated product post-processing procedures
[0008] The above-mentioned production method consumes a lot of energy, takes a long time and the product purity is not very high (~97%), so the price of boron phosphate is high on the market

Method used

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  • Nano-grade boron phosphate rapid preparation method with microwave radiation low-temperature solid-phase reaction method
  • Nano-grade boron phosphate rapid preparation method with microwave radiation low-temperature solid-phase reaction method

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Experimental program
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Effect test

Embodiment 1

[0021] In the crucible, directly weigh phosphoric acid (85%) 5.76g, boric acid 2.81g, P 2 o 5 and B 2 o 3 The matching ratio is 1.1:1. Place the crucible in an ultrasonic generator to vibrate and disperse for 10 minutes, put it in a household microwave oven, and microwave it for 8 minutes under a microwave power of 400W, then take out the crucible to obtain boron phosphate. The XRD spectrum of this product is completely consistent with the standard spectrum (JPDS 14-1696) (see attached figure 1 ), it can be explained that what is obtained is pure boron phosphate. Measure the B content in boron phosphate (in B 2 o 3 In terms of) and P content (in P 2 o 5 Count) are B 2 o 3 =32.63%, P 2 o 5 = 66.95%. SEM image shows the prepared BPO 4 The particle diameter is between 20-100nm.

Embodiment 2

[0023] Press P 2 o 5 :B 2 o 3 =0.9:1 ratio weighing P 2 o 5 3.55g, 3.44g boric acid, grind in a mortar, add 1mL water to make a paste, dry under an infrared lamp, put it into a crucible, and microwave it in a microwave oven at a power of 800W for 20min to obtain boron phosphate. B in the measured product 2 o 3 =32.81%, P 2 o 5 = 66.34%.

Embodiment 3

[0025] Weigh phosphoric acid (85%) 5.76g directly in the crucible, B 2 o 3 1.74g, P 2 o 5 and B 2 o 3 The ratio is 1:1. Place the crucible in an ultrasonic generator to oscillate and disperse for 30 minutes, then place it in a household microwave oven, microwave for 12 minutes under a microwave power of 640W, and then take out the crucible to obtain boron phosphate. B in the measured product 2 o 3 =32.78%, P 2 o 5 = 66.85%.

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Abstract

The invention discloses a nano-grade boron phosphate rapid preparation method. According to the invention, phosphoric acid (or P2O5) is adopted as a phosphorus source; boric acid (or B2O3) is adopted as a boron source; the materials are accurately weighed according to a molar ratio that P2O5:B2O3=0.8-1.2:1, and are subjected to ultrasonic dispersion, or are subjected to solid-phase grinding with a small amount of water; the obtained material is subjected to a reaction for 0.5-30min under the effect of microwave irradiation; and without any other treatment, the nano-grade boron phosphate product can be directly obtained. The preparation method provided by the invention is advantaged in short preparation time, low energy consumption, cheap and easy-to-obtain raw materials, and simple process. The method is green and environment-friendly. The method is suitable for industrialized productions of high-quality boron phosphate.

Description

technical field [0001] The invention relates to a method for preparing phosphate, more specifically, relates to a method for preparing nanometer boron phosphate by microwave solid-phase reaction. Background technique [0002] Boron phosphate products have important industrial value as heat-stable pigments, coatings, petroleum additives, preservatives, acid purifiers, decondensing electrolytes for fuel cells, and raw materials for preparing metal phosphates. Boron phosphate is the raw material for making sodium borohydride. Hydrates can be used as fertilizers. Adding boron phosphate to ceramics can greatly improve the strength of ceramic materials, and boron phosphate in glass can absorb part of electromagnetic radiation. In electronic composite devices, silicon phosphoborate glass ceramics have been widely used. Boron phosphate is used as a catalyst for organic synthesis, such as catalysts for dehydrogenation, dehydration, alkylation, isomerization, catalytic cracking of ...

Claims

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Application Information

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IPC IPC(8): C01B35/14B82Y40/00
Inventor 王锐姜恒宫红张军
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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