Carbonization method for preparing nano calcium carbonate

A technology of nano-calcium carbonate and carbonization reaction, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, nanotechnology, etc., can solve the problems of affecting emulsification efficiency, low contact efficiency, slow mass transfer rate, etc., and achieve good economic benefits and Social benefits, excellent product performance, and easy control of the process
CN102923749AActive Publication Date: 2013-02-13GUANGXI HUANA NEW MATERIALS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGXI HUANA NEW MATERIALS TECH CO LTD
Publication Date
2013-02-13

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Abstract

The invention discloses a carbonization method for preparing nano calcium carbonate. The carbonization method comprises homogenate, pressurization, primary carbonization, homogenization and secondary carbonization. The carbonization method is characterized in that refined calcium hydroxide slurry passes through the position of a nozzle of a specially made venturi tube reactor through a strong-force pump, atomization is regulated by adjusting the bore diameter of the nozzle and the water outlet speed of the strong-force pump, the atomized slurry and adsorbed kiln gas which is carbon dioxide instantly undergo a primary carbonization reaction, primary carbonization liquid undergoes a secondary carbonization reaction in an intermittent type reaction kettle, multiple circulating carbonization reactions are achieved under the effect of the strong-force pump, and nano calcium carbonate is obtained by cladding treatment. The specially made venturi tube reactor is used, the kiln gas is led in without needing an air compressor, the temperature is always maintained at a stable level in the carbonization process, and product quality is guaranteed. Device investment for the method is small, a process is easy to control, and the carbonization method is suitable for industrial production and has good economic benefit and social benefit.
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Description

Technical field:

[0001] The invention belongs to the field of preparation of inorganic chemical materials and nanometer materials, and relates to a carbonization method, in particular to a carbonization method for preparing nanometer calcium carbonate. Background technique:

[0002] Calcium carbonate is a white, non-toxic filler that is widely available. High-purity precipitated calcium carbonate with suitable particle size and shape can be obtained by adjusting the production process. Precipitated calcium carbonate is widely used in the fields of plastics, papermaking, rubber, viscose, coatings and inks. It not only plays the role of incremental filling and reduces processing costs, but also can perform functional modification on filling objects. Especially nano-calcium carbonate, because of its smaller particle size, higher specific surface area and special surface treatment, has superior properties that cannot be compared with ordinary calcium carbonate. For plastic pro...

Claims

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