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Preparation method of micron-sized large-particle barium sulfate

A barium sulfate and large particle technology, applied in chemical instruments and methods, calcium/strontium/barium sulfate, calcium/strontium/barium compounds, etc., can solve the problem of poor particle uniformity, immature micron-sized large particle barium sulfate technology, etc. problem, to achieve the effect of uniform particles, low oil absorption value and good dispersion

Inactive Publication Date: 2017-09-26
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of micron-sized large particle barium sulfate, which mainly solves the problems of immature technology for preparing micron-sized large particle barium sulfate and poor particle uniformity in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A, prepare sulfuric acid-hydrochloric acid mixed solution, in this mixed solution, hydrochloric acid is saturated hydrochloric acid solution, and the massfraction that sulfuric acid accounts for in this mixed solution is 10%;

[0027] b. Add barium chloride and sulfuric acid-hydrochloric acid mixed solution (the molar ratio of barium chloride to sulfuric acid in the mixed solution is 1:1) into the stirred tank reactor, the rotation speed is 10rpm, and the reaction temperature is 100°C for 24h. Obtain a mixture containing barium sulfate solid;

[0028] c. Filtrating and washing the mixture containing barium sulfate solid obtained in step b to obtain a barium sulfate product with a particle size of about 1 μm.

Embodiment 2

[0030] A, prepare sulfuric acid-hydrochloric acid mixed solution, in this mixed solution, hydrochloric acid is saturated hydrochloric acid solution, and the massfraction that sulfuric acid accounts for in this mixed solution is 15%;

[0031] b. Add barium chloride and sulfuric acid-hydrochloric acid mixed solution (the molar ratio of barium chloride to sulfuric acid in the mixed solution is 1:1) into the stirred tank reactor, the rotation speed is 20rpm, and the reaction temperature is 100°C for 48 hours. Obtain a mixture containing barium sulfate solid;

[0032] c. Filtrating and washing the mixture containing barium sulfate solid obtained in step b to obtain a barium sulfate product with a particle size of 1 µm to 2 µm.

Embodiment 3

[0034] A, prepare sulfuric acid-hydrochloric acid mixed solution, in this mixed solution, hydrochloric acid is saturated hydrochloric acid solution, and the massfraction that sulfuric acid accounts for in this mixed solution is 40%;

[0035] b. Add barium nitrate and sulfuric acid-hydrochloric acid mixed solution (the molar ratio of barium nitrate to sulfuric acid in the mixed solution is 1:1) into the stirred tank reactor, the rotation speed is 40rpm, and the reaction temperature is 140°C for 36h to obtain Mixtures containing barium sulfate solids;

[0036] c. Filtrating and washing the mixture containing barium sulfate solids obtained in step b to obtain a barium sulfate product with a particle size of 2 μm to 5 μm.

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PUM

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Abstract

The invention relates to a method for preparing barium sulfate with micron-sized large particles, which belongs to the field of preparation of inorganic non-metallic functional materials. The method mainly solves the technical problems that the currently prepared barium sulfate crystals have small particle size and uneven distribution. The technical scheme of the present invention is: add the mixed solution of barium salt and sulfuric acid-saturated hydrochloric acid into the stirred tank reactor for reaction, the mass content of sulfuric acid in the mixed solution is 5% to 40%, and react at a reaction temperature of 100 to 180°C for 12 ~48h, the preparation of barium sulfate with high activation degree, low oil absorption value and good dispersibility is 1~8μm micron-sized large particles. The preparation method is simple and reliable, and the product quality is stable.

Description

technical field [0001] The invention relates to the field of preparation of inorganic non-metallic functional materials, in particular to a preparation method of barium sulfate with micron-sized large particles. Background technique [0002] Barium sulfate is an important inorganic chemical product. Due to its stable chemical and physical properties, low hardness and electrical insulation, and high density; the color of the particles is white, high brightness, not afraid of light, insoluble in acid and alkali and does not mix with acid and alkali. Reaction, good dispersion and other characteristics, so it is widely used in coatings, inks, printing and other fields. Due to its moderate particle size, micron particles are mainly used for medical angiography between 1µm and 2µm; barium sulfate of 2µm~5µm is mainly used for milky white synthetic resin and cosmetic additives; and the large particle size is 5µm~10µm High-quality barium sulfate is used in the field of injection mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46
CPCC01F11/462C01P2004/61
Inventor 刘玉敏谢凯旋梁泽齐然刘越张向京
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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