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A kind of preparation method of nano active calcium carbonate

A technology of activated calcium carbonate and nano-calcium carbonate, which is applied in the direction of calcium carbonate/strontium/barium, nanotechnology, chemical instruments and methods, etc., can solve the problem that the crystal growth of ultra-fine activated calcium carbonate is difficult to control, easy to produce wrapping, and one-time molding Large particles and other problems, to avoid growth and agglomeration, increase ion concentration, improve the effect of adsorption load capacity

Inactive Publication Date: 2019-02-15
FOSHAN SUXING MASTERBATCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is: the crystal growth of ultrafine activated calcium carbonate prepared by the traditional one-step carbonization method is difficult to control, the product has a large particle size at one time, and the problem of encapsulation is easy to occur during the reaction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Weigh 500g of activated carbon, place it in a pulverizer, and sieve it through a 120-mesh sieve to obtain powdered activated carbon. Pour the obtained powdered activated carbon into a beaker filled with 1200mL deionized water, and then move the beaker into a digital display speed measuring constant temperature magnetic stirring Add a sodium hydroxide solution with a mass fraction of 10% dropwise to adjust the pH to 9.6, then add 20 g of dopamine into the beaker at a temperature of 65 °C and a rotation speed of 800 r / min, and continue to stir and react at a constant temperature for 60 minutes until the reaction is completed. , dropwise add mass fraction of 8% hydrochloric acid, adjust the pH to neutral, and obtain a dopamine-modified activated carbon slurry; weigh 50g of dendritic lichen, pour it into a mortar, grind for 10min, and spread the material in the mortar evenly on the surface of the solid medium, and then transfer the solid medium into a constant temperature in...

example 2

[0018]Weigh 300g of activated carbon, place it in a pulverizer, and pass through an 80-mesh sieve after crushing to obtain powdered activated carbon. Add 10% sodium hydroxide solution dropwise to the agitator, adjust the pH to 9.2, then add 10 g of dopamine to the beaker at a temperature of 55°C and a rotation speed of 600 r / min, and continue stirring at a constant temperature for 45 minutes. At the end, add hydrochloric acid with a mass fraction of 8% dropwise, adjust the pH to neutral, and obtain a dopamine-modified activated carbon slurry; weigh 30g of dendritic lichen, pour it into a mortar, grind for 5 minutes, and evenly coat the material in the mortar Place the solid medium on the surface of the solid medium, then transfer the solid medium into a constant temperature incubator, and incubate at a constant temperature for 3 days at a temperature of 18°C, then rinse the surface of the medium with 300mL of deionized water to obtain a suspension of mycelia; Described solid m...

example 3

[0020] Weigh 400g of activated carbon, place it in a pulverizer, and pass through a 100-mesh sieve after crushing to obtain powdered activated carbon. Add 10% sodium hydroxide solution dropwise to the stirrer, adjust the pH to 9.4, then add 15g of dopamine into the beaker at a temperature of 60°C and a rotation speed of 700r / min, and continue stirring at a constant temperature for 50 minutes. At the end, add hydrochloric acid with a mass fraction of 8% dropwise, adjust the pH to neutral, and obtain a dopamine-modified activated carbon slurry; weigh 40g of dendritic lichen, pour it into a mortar, grind for 7 minutes, and evenly coat the material in the mortar Place the solid medium on the surface of the solid medium, then transfer the solid medium into a constant temperature incubator, and culture it at a constant temperature for 4 days at a temperature of 19°C, then rinse the surface of the medium with 400mL deionized water to obtain a suspension of mycelia; The described soli...

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Abstract

The invention relates to a preparation method of calcium carbonate and particularly relates to a preparation method of nano activated calcium carbonate. The method comprises the steps of firstly preparing slurry from activated carbon, adsorbing dopamine into an activated carbon pore structure in a weak alkaline environment, carrying out oxidative autopolymerization under the action of dissolved oxygen in water to form a three-dimensional network structure in the pore structure, loading a microorganism obtained through fruticose lichen culture by using pretreated activated carbon, adding the microorganism-loaded activated carbon into a calcium chloride solution, chelating an organic matter with negative charges on the cell surface of the microorganism and calcium ions in the solution, and continuously generating carbon dioxide through the respiratory action of the microorganism, so that the concentration of carbonate ions in a surrounding solution of the microorganism is continuously increased, the concentration of the carbonate ions and calcium ions in activated carbon pores is increased, calcium carbonate crystal precipitate formed by combination of the carbonate ions and the calcium ions is separated out and adsorbed by the activated carbon and is burnt to remove the activated carbon, and the nano activated calcium carbonate is prepared through activating treatment of a silane coupling agent.

Description

technical field [0001] The invention relates to a preparation method of calcium carbonate, in particular to a preparation method of nano-active calcium carbonate. Background technique [0002] Ultrafine activated calcium carbonate is white fine powder, odorless, tasteless, non-toxic, hydrophobic, stable in the atmosphere, and has a reinforcing effect on natural rubber and various synthetic rubbers. For example, the main technical indicators of the 505 type ultra-fine activated calcium carbonate currently produced have reached or exceeded that of semi-reinforced carbon black, and the comparative formula experiment shows that its tearing strength can reach 260kg / cm 2 , the performance is better than semi-reinforced carbon black (240kg / cm 2 ). In the formula of rubber products, it can replace part of semi-reinforcing carbon black, white carbon black, lithopone, etc. At present, it has been widely used in rubber tubes, belts, tire oil skins, pads, inner tubes, rubber shoes, ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18C01B32/354B82Y40/00C05G3/00
CPCB82Y40/00C01F11/18C01P2004/64C01P2006/80C05B7/00C05G3/00C05D3/00C05D5/00C05D9/00C05F11/00
Inventor 孙祎许丽君
Owner FOSHAN SUXING MASTERBATCH
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