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Method for preparing spherical barium carbonate powder

A barium carbonate and spherical technology is applied in the field of preparation of spherical barium carbonate powder to achieve the effects of improving yield, enhancing enzymatic action and facilitating growth and reproduction

Inactive Publication Date: 2013-04-24
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the method for preparing barium carbonate by biomineralization has not been reported in the literature

Method used

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  • Method for preparing spherical barium carbonate powder
  • Method for preparing spherical barium carbonate powder
  • Method for preparing spherical barium carbonate powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A preparation method utilizing microorganisms to induce barium carbonate precipitation, comprising: glucose 10-60g, peptone 5-50g, sodium chloride 1-10g, urea 10-60g, Ba(NO 3 ) 2 1-10g and 1000g of distilled water are mixed to prepare a liquid medium, adjust the pH value to 6-9, and sterilize. Urea and calcium nitrate were added to the above-mentioned medium through the method of microporous membrane filter sterilization. Inoculate the liquid strain of Bacillus pasteurii (Bacillus pasteurii) into the liquid culture medium, shake and culture for 48 hours at 25-40°C, 100-200r / min, rest for 12-36 hours, filter with distilled water and absolute ethanol Wash and dry at 45°C for 24 hours to obtain spherical barium carbonate powder.

Embodiment 2

[0036] A preparation method utilizing microorganisms to induce barium carbonate precipitation, comprising: glucose 10-60g, peptone 5-50g, sodium chloride 1-10g, urea 10-60g, Ba(NO 3 ) 21-10g, Tween 800.1%-0.3% (V / V), and distilled water 1000g are mixed to form a liquid medium, the pH value is adjusted to 6-9, and sterilized. Urea and calcium nitrate were added to the above-mentioned medium through the method of microporous membrane filter sterilization. Inoculate the liquid strain of Bacillus pasteurii (Bacillus pasteurii) into the liquid culture medium, shake and cultivate for 48 hours at 25-40°C and 100-200r / min, rest for 12-36 hours, filter with suction, and use distilled water and anhydrous Wash with ethanol and dry at 45°C for 24 hours to obtain spherical barium carbonate powder.

Embodiment 3

[0038] A preparation method utilizing microorganisms to induce barium carbonate precipitation, comprising: glucose 10-60g, peptone 5-50g, sodium chloride 1-10g, urea 10-60g, Ba(NO 3 ) 2 1-10g, nickel chloride 50-250μmol / L, Tween 800.1%-0.3% (V / V), and distilled water 1000g are mixed to form a liquid medium, the pH value is adjusted to 6-9, and sterilized. Nickel chloride, urea and calcium nitrate were added to the above-mentioned culture medium by filtering and sterilizing through a microporous membrane. Inoculate the liquid strain of Bacillus pasteurii (Bacillus pasteurii) into the liquid culture medium, shake and culture for 48 hours at 25-40°C, 100-200r / min, rest for 12-36 hours, filter with distilled water and absolute ethanol Wash and dry at 45°C for 24 hours to obtain spherical barium carbonate powder.

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Abstract

The invention relates to a method for preparing spherical barium carbonate powder. The method is characterized by comprising the following steps of: mixing 10- 60 parts by weight of glucose, 5-50 parts by weight of peptone, 1-10 parts by weight of sodium chloride, 10-60 parts by weight of carbamide, 1-10 parts by weight of Ba(NO3)2 and 1000 parts by weight of distilled water to form a solution, adjusting the pH value to be 6 to 9, sterilizing, inoculating Pasteur bacillus to a liquid nutrient medium, shaking for culturing for 24-48 hours under the temperature of 25-40 DEG C and at the speed of 100-200 r / min, standing for 12-36 hours, filtering, washing with water and absolute ethyl alcohol, and drying to prepare the spherical barium carbonate powder. The invention is based on biomineralization principles and has the advantages of simple process, abound resources and environment protection. The prepared spherical barium carbonate has high purity, good dispersibility and a small grain size and can be used for manufacturing various electron components, such as electronic ceramics, constant temperature heating elements, storage batteries, and the like.

Description

technical field [0001] The invention belongs to a method for preparing barium carbonate, and relates to a method for preparing spherical barium carbonate powder. The prepared barium carbonate is especially suitable for the manufacture of various electronic components such as electronic ceramics, constant temperature heating elements, storage batteries and the like. Background technique [0002] Barium carbonate is an important inorganic chemical raw material, which is widely used in the fields of glass, ceramics, microelectronic devices, magnetic materials and superconductors. With the development of science and technology, the quality requirements of barium carbonate are getting higher and higher, and different application fields have different requirements for the shape of barium carbonate crystals. Therefore, the research on the crystal shape control of barium carbonate has been paid more and more attention by scientists. In the prior art, there are many methods for prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P3/00
Inventor 竹文坤罗学刚林晓艳周建陆爱霞
Owner SOUTHWEAT UNIV OF SCI & TECH