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Method for preparing high-purity spherical instant boric acid by induction of organic molecules

A technology of organic molecules and boric acid, applied in chemical instruments and methods, inorganic chemistry, boron compounds, etc., can solve the problems of easy agglomeration and slow dissolution rate of boric acid, and achieve fluidity without agglomeration, low cost and good fluidity. Effect

Active Publication Date: 2019-07-26
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method solves the problems of easy agglomeration and slow dissolution rate of ordinary flake boric acid in the past

Method used

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  • Method for preparing high-purity spherical instant boric acid by induction of organic molecules
  • Method for preparing high-purity spherical instant boric acid by induction of organic molecules
  • Method for preparing high-purity spherical instant boric acid by induction of organic molecules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 20g of analytically pure boric acid into a pressure vessel containing 100g of a mixed solvent, wherein the mixed solvent is prepared from ethanol, acetone and water according to the above formula ratio; heat the pressure vessel to make the temperature reach about 140°C to obtain a clear solution; then control the cooling rate for about 5 °C / min, lower the temperature of the container to room temperature, and place it at room temperature for about 0.5 hours. At this time, a large amount of white precipitate precipitates in the solution; filter the precipitate and dry it at 60 °C to obtain loose spherical porous boric acid powder , whose shape is shown in Figure 1. The X-ray diffraction pattern of the obtained powder is shown in figure 2 After analysis, it meets the standard card JCPDS No.30-0199; take 3.0g of the obtained spherical boric acid, add it to a beaker filled with 97g of deionized water, and magnetically stir at 400rpm, and it can be completely dissolved wi...

Embodiment 2

[0028] With the difference condition of embodiment 1: (1) used mixed solvent is the mixed solution of acetone and water;

[0029] (2) The temperature of the pressure vessel is 300°C;

[0030] (3) The cooling rate is about 20°C / min;

[0031] (4) The drying temperature is 80°C.

Embodiment 3

[0033] Distinguishing conditions with Example 1: (1) the mixed solvent used is the mixed solution of ether and water;

[0034] (2) The temperature of the pressure vessel is 40°C;

[0035] (3) The cooling rate is about 0.2°C / min;

[0036] (4) The drying temperature is 110°C.

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Abstract

The invention belongs to the technical field of inorganic functional materials and provides a method for preparing high-purity spherical instant boric acid by induction of organic molecules. The high-purity spherical boric acid with no aggregation is prepared by: dissolving analytically pure boric acid or industrial boric acid in a hot solvent which is a mixture of water with a lower alcohol, ketone, ether or acid with carbon number of less than 4, cooling the boric acid solution based on the solubility and surface free energy control principle, adjusting exposed crystal face of boric acid crystal and morphology of aggregated particles by inducing crystallization via organic molecules so that recrystallized boric acid microspheres are separated from the oversaturated solution, carrying outsuction filtering, and drying. Instant spherical boric acid powder prepared via the method is simple to operate, the technical conditions are easy to control, consuming a surfactant or aid is not required, material utilization rate is high, and the finished product has high purity. The problems are solved that, for instance, the traditional common boric acid has low dissolving speed and cakes easily.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic functional materials, and in particular relates to a preparation method of high-purity spherical instant boric acid. Background technique [0002] Due to its unique physical and chemical properties, boric acid is widely used in many fields such as industry, agriculture, medicine, new energy, aerospace and optoelectronic materials. Because the crystal morphology of traditional boric acid is usually lamellar, its dissolution rate in water is slow, which leads to a series of problems such as affecting the efficiency and affecting the quality of operation in some special occasions such as nuclear power plants. At present, there are very few public literature reports about improving the dissolution rate of boric acid or the preparation of instant boric acid. The methods commonly used in the industry include increasing the dissolution temperature or stirring rate, grinding to form a sma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10
CPCC01B35/1054C01P2004/32
Inventor 宁桂玲朱培函庞洪昌田朋叶俊伟程君林源
Owner DALIAN UNIV OF TECH
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