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Method for preparing barium carbonate and strontium carbonate through microorganism mineralization

A technology of microorganisms and barium carbonate, which is applied in the field of compound preparation to achieve the effects of simple preparation process, strong practicability and low cost

Inactive Publication Date: 2010-12-08
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art, the methods for controlling the morphology and size of barium carbonate and strontium carbonate particles in the laboratory mainly include precipitation method, homogeneous precipitation method, microemulsion method, template method and solid phase method etc.; The crystal morphology and size can be controlled by rotating bed, carbonization tower and other facilities, and the preparation of barium carbonate and strontium carbonate powder by biomineralization has not been reported yet.

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  • Method for preparing barium carbonate and strontium carbonate through microorganism mineralization
  • Method for preparing barium carbonate and strontium carbonate through microorganism mineralization
  • Method for preparing barium carbonate and strontium carbonate through microorganism mineralization

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Effect test

Embodiment 1-8

[0042] A kind of microbial mineralization prepares the method for barium carbonate, comprises the following steps:

[0043] Prepare the culture medium of microorganism Bacillus pasteurianus and prepare the culture solution containing Bacillus pasteurianus: take 15g of peptone, 5g of NaCl, 1L of distilled water, mix them evenly to form a culture medium and distribute them into conical flasks (such as 250ml conical flasks) 1. Obtain sterilized nutrient solution after high-temperature sterilization; get a Erlenmeyer flask with sterilized nutrient solution, inoculate it with Bacillus Pasteurella, and put the seeds (being Bacillus Pasteurella) into the shaker In the bed (or other equipment in the prior art), at a temperature of 30°C and a rotating speed of 200r / min, cultivate for 12h; get 10ml of the cultured Bacillus pasteurian seed solution and inject it into 100ml of sterilized culture solution , expand the culture in a shaker for 35h (at a temperature of 30°C and a rotating spe...

Embodiment 9-10

[0051] A kind of microbial mineralization prepares the method for barium carbonate, comprises the following steps:

[0052] The cultivation of Bacillus pasteurianus was as in Example 1-8. After the Bacillus pasteurianum was expanded and cultivated for 35h, the barium chloride of 0.01mol / L, urea solution and 0.292g surfactant ethylenediaminetetraacetic acid (EDTA) were added to the above culture solution containing the Bacillus pastereuii simultaneously, The molar ratio of barium chloride to urea solution is 1:6, the reaction temperature is 30°C, and the rotation speed is 200r / min. After 16 hours of reaction, the barium carbonate powder is obtained by aging, washing, filtering and drying, which is spherical and has a particle size of about 3 μm. The powder has complete shape, uniform distribution and no agglomeration. Adding different surfactants and controlling the dosage, the particle size and shape of the barium carbonate powder are different, as shown in Table 2.

[0053...

Embodiment 11

[0056] A kind of microbial mineralization prepares the method for barium carbonate, comprises the following steps:

[0057] The first step, ingredients: get the culture fluid (that is, contain the culture fluid of the bacillus pasturella after cultivation) that has been inoculated with Bacillus pasteurianum after cultivation, take the ratio of adding 0.001mol barium chloride by 1L of this culture fluid Barium chloride, by barium chloride: the ratio of the amount of substance (mol) of urea is to get urea in the ratio of 1: 1;

[0058] The second step, mineralization reaction: according to the order of adding barium chloride first and then adding urea, barium chloride and urea are added to the culture solution inoculated with Bacillus pasturella and cultivated at 10°C. Under the temperature, stir reaction 54h, obtain the post-reaction material that has barium carbonate;

[0059] The third step, aging and post-treatment: after the reacted material containing barium carbonate was...

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Abstract

The invention discloses a method for preparing barium carbonate and strontium carbonate through microorganism mineralization. The method is characterized by comprising the following steps of: taking a culture medium inoculated with bacillus pasteurii and used for culturing the bacillus pasteurii, taking barium chloride according to a principle that 0.001 to 2mol of barium chloride is added into 1L of culture medium, and taking carbamide according to the mass ratio of barium chloride to carbamide of 1:1-1:48; adding the barium chloride and the carbamide into the culture medium inoculated with bacillus pasteurii and used for cultivating the bacillus pasteurii, and reacting the mixture with stirring for 12 to 54 hours at the temperature of 10 to 100 DEG C to obtain a reactant with barium carbonate; and after standing to age the reactant for 1 to 24 hours, filtering the reactant, washing the solid with water, and drying the solid to obtain white powder of barium carbonate. The method is also suitable for preparing strontium carbonate. The method can be used for preparing barium carbonate and strontium carbonate products of different shapes, sizes and function characteristics and is practical.

Description

technical field [0001] The invention belongs to a method for preparing metal strontium and barium compounds, and relates to a method for preparing barium carbonate and strontium carbonate through microbial mineralization. It is suitable for preparing barium carbonate and strontium carbonate (powder) with different shapes and sizes by microbial mineralization. Background technique [0002] Biomineralization refers to the formation process of biominerals with special advanced structures and assembly methods in biological systems. The process of biomineralization involves the selective precipitation of inorganic elements from the biological microenvironment under strict biological control, and the formation of minerals with special structures and independent functions on specific organic interfaces. The remarkable feature of biomineralization that is different from general mineralization is that it controls the precipitation and growth of inorganic mineral phases from the mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C12R1/07C12R1/125C12R1/01
Inventor 霍冀川王丽娜王程雷永林
Owner SOUTHWEAT UNIV OF SCI & TECH
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