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Preparation method of shape controllable monodisperse barium sulfate crystal particles

A monodisperse, barium sulfate technology, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of high energy consumption and high equipment investment, and achieve the effects of energy saving, uniform particle size and simple operation.

Inactive Publication Date: 2012-03-21
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN101423239A provides a method for preparing barium sulfate particles with controllable particle size by using a rotating liquid film reactor rotating at high speed, but the energy consumption is large and the equipment investment is high

Method used

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  • Preparation method of shape controllable monodisperse barium sulfate crystal particles
  • Preparation method of shape controllable monodisperse barium sulfate crystal particles
  • Preparation method of shape controllable monodisperse barium sulfate crystal particles

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Experimental program
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Effect test

Embodiment 1

[0029]After the 1L glass beaker was cleaned, the preparation concentration was 0.001g / L sulfonated polyaspartic acid derivative (this sulfonated polyaspartic acid derivative refers to the literature (Macromolecular Materials Science and Engineering, 2008, 24, 44-50) is prepared by reacting taurine with polysuccinimide (m / n=40 / 100) aqueous solution, and the pH value of the aqueous solution of sulfonated polyaspartic acid derivatives is adjusted to 1 with hydrochloric acid under stirring, so that The same flow rate of 3ml / min injected 2mol / L barium acetate aqueous solution and 2mol / L ammonium sulfate aqueous solution into the aqueous solution of sulfonated polyaspartic acid derivatives at the same time; Stop injecting barium acetate aqueous solution and ammonium sulfate aqueous solution after the turbidity, cover the beaker with a layer of film to cover dust, leave it to age at room temperature for 5 hours, separate and dry, and obtain spherical barium sulfate crystal particles w...

Embodiment 2

[0032] After cleaning the 1L glass beaker, prepare hydroxylated polyaspartic acid (hydroxylamine and polyaspartic acid) with a concentration of 2g / L, at 80°C, in the form of P 2 o 5 Prepare the dehydrating agent through amidation reaction, m / n=10 / 100) aqueous solution, adjust the pH value of the aqueous solution of hydroxylated polyaspartic acid to 7 with aqueous sodium hydroxide solution under stirring, and simultaneously use the same flow rate of 0.2ml / min Inject 0.1mol / L barium nitrate solution and 0.1mol / L sodium sulfate solution into the hydroxylated polyaspartic acid aqueous solution; stop injecting barium nitrate aqueous solution and sulfuric acid after the hydroxylated polyaspartic acid aqueous solution produces obvious turbidity Sodium aqueous solution, covered with a layer of film to cover dust on the beaker, static aging at room temperature for 10 hours, separated and dried to obtain spherical barium sulfate crystal particles with a particle size of about 0.5 μm.

...

Embodiment 3

[0035] After cleaning the 1L glass beaker, prepare a mixed aqueous solution containing 0.1g / L polyaspartic acid and 0.001g / L 2-aminoethanol, adjust the pH value of the above mixed aqueous solution to 13 with potassium hydroxide under stirring, and use 3ml At the same flow rate per minute, inject 10mol / L barium chloride aqueous solution and 10mol / L potassium sulfate aqueous solution into the above-mentioned mixed aqueous solution at the same time; stop injecting barium chloride aqueous solution and potassium sulfate aqueous solution after the above-mentioned mixed aqueous solution is obviously turbid. Cover with a layer of film to cover dust, aging at room temperature for 24 hours, separate and dry to obtain disc-shaped barium sulfate crystal particles with a particle size of about 1.5 μm.

[0036] The SEM photo of the prepared barium sulfate crystal particles is shown in Figure 1c .

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Abstract

The invention belongs to the field of biomimetically synthesized inorganic material, specifically to a preparation method of shape controllable monodisperse barium sulfate crystal particles. The preparation method comprises the steps of: after cleaning a container, preparing a polymer solution which is 0.001g-2g / L in concentration; adjusting pH value of the polymer solution by acidic solution or alkali liquor under agitation to 1-13 and injecting barium salt aqueous solution and sulfate aqueous solution in same molarity with same flow to the polymer solution at the same time; after producing obvious turbid in the polymer aqueous solution, stopping injecting barium salt aqueous solution and sulfate aqueous solution; standing and aging for 5-120 hours in dustproof condition at room temperature; separating and drying to obtain the shape controllable monodisperse barium sulfate crystal particles. The method provided by the invention is simple to operate and can save energy resources. The barium sulfate crystal particles prepared are uniform in grain diameter, controllable in shape and the shape of the particles can be controlled from disc type to microballoon type continuously so that the invention has the potential for large scale production.

Description

technical field [0001] The invention belongs to the field of biomimetic synthesis of inorganic materials, and in particular relates to a method for preparing monodisperse barium sulfate crystal particles with controllable morphology. Background technique [0002] The main use of barium sulfate is as a material for drilling mud, and secondly, like calcium carbonate, it is used as a filler or additive in coatings, plastics, papermaking, rubber, ink and other industries. Although the price of barium sulfate is higher than that of calcium carbonate, it has many excellent properties that calcium carbonate does not have, and the amount of products that achieve the same effect is usually less than that of calcium carbonate, so its demand for fillers and additives is increasing year by year. At present, my country's consumption structure is as follows: the paint industry accounts for 59.2%, the plastic industry accounts for 10.5%, the paper industry accounts for 5.3%, the rubber ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46
Inventor 袁国卿闫丰文张抒峰张晓慧郭存悦
Owner INST OF CHEM CHINESE ACAD OF SCI
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