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Preparation method of nano calcium carbonate

A technology of nano-calcium carbonate and inorganic calcium, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, nanotechnology, etc., can solve problems such as uneven particle size and complicated process, and achieve the effect of solving pollution problems and reducing costs

Active Publication Date: 2019-02-12
绍兴市慧融臻合新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art, the present invention provides a method for preparing nano-calcium carbonate, which solves the problems of complex existing processes, uneven particle size and large size, and effectively controls carbonic acid by controlling the dissolution and crystallization of calcium hydroxide. Calcium conversion efficiency, to obtain nano-calcium carbonate with uniform particle size

Method used

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  • Preparation method of nano calcium carbonate

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Embodiment 1

[0034] A preparation method of nano-calcium carbonate, comprising the steps of:

[0035] Step 1, dissolving the water-soluble inorganic calcium salt in distilled water and ultrasonically dissolving for 30 minutes, and filtering at a constant temperature to obtain an inorganic calcium solution;

[0036] Step 2, passing ammonia gas into the inorganic calcium solution for cyclic aeration and ultrasonic reaction for 1 hour to obtain a calcium hydroxide solution;

[0037] Step 3, adding hydroxypropyl cellulose to the calcium hydroxide solution, sonicating until it is completely dispersed, and then heating and evaporating to obtain a suspension concentrate;

[0038] Step 4, adding carbon dioxide gas into the suspension concentrated liquid and circulating aeration microwave reaction for 2 hours to obtain the suspension liquid;

[0039] Step 5, the suspension is filtered to obtain a white precipitate, then soaked in anhydrous ethanol for an ultrasonic reaction for 1 hour, and after f...

Embodiment 2

[0050] A preparation method of nano-calcium carbonate, comprising the steps of:

[0051] Step 1, dissolving the water-soluble inorganic calcium salt in distilled water and ultrasonically dissolving for 60 minutes, and filtering at a constant temperature to obtain an inorganic calcium solution;

[0052]Step 2, passing ammonia gas into the inorganic calcium solution, circulating aeration and ultrasonic reaction for 3 hours, to obtain calcium hydroxide solution;

[0053] Step 3, adding hydroxypropyl cellulose to the calcium hydroxide solution, sonicating until it is completely dispersed, and then heating and evaporating to obtain a suspension concentrate;

[0054] Step 4, adding carbon dioxide gas into the suspension concentrated liquid and circulating aeration microwave reaction for 4 hours to obtain the suspension liquid;

[0055] Step 5, the suspension is filtered to obtain a white precipitate, then soaked in absolute ethanol for 3 hours of ultrasonic reaction, filtered and d...

Embodiment 3

[0065] A preparation method of nano-calcium carbonate, comprising the steps of:

[0066] Step 1, dissolving the water-soluble inorganic calcium salt in distilled water for 50 minutes, ultrasonically dissolving, and filtering at a constant temperature to obtain an inorganic calcium solution;

[0067] Step 2, passing ammonia gas into the inorganic calcium solution, circulating aeration and ultrasonic reaction for 2 hours, to obtain calcium hydroxide solution;

[0068] Step 3, adding hydroxypropyl cellulose to the calcium hydroxide solution, sonicating until it is completely dispersed, and then heating and evaporating to obtain a suspension concentrate;

[0069] Step 4, adding carbon dioxide gas into the suspension concentrated liquid and circulating aeration microwave reaction for 3 hours to obtain the suspension liquid;

[0070] Step 5, the suspension is filtered to obtain a white precipitate, then soaked in absolute ethanol for 2 hours of ultrasonic reaction, filtered and dri...

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Abstract

The invention discloses a preparation method of nano calcium carbonate. The preparation method comprises the following steps: step 1, dissolving water-soluble inorganic calcium salt into distilled water and carrying out ultrasonic dissolving for 30 to 60 min; filtering at constant temperature to obtain an inorganic calcium solution; step 2, introducing ammonia gas into the inorganic calcium solution and carrying out circulated aeration ultrasonic reaction for 1 to 3 h to obtain a calcium hydroxide solution; step 3, adding hydroxypropyl cellulose into the calcium hydroxide solution and carryingout ultrasonic treatment until the calcium hydroxide solution is completely dispersed; then heating and evaporating to react, so as to obtain a suspended concentrated solution; step 4, adding carbondioxide gas into the suspended concentrated solution and carrying out circulated aeration microwave reaction for 2 to 4 h to obtain a suspended solution; step 5, filtering the suspended solution to obtain white precipitate; then soaking the white precipitate into absolute ethyl alcohol and carrying out ultrasonic reaction for 1 to 3 h; after filtering, carrying out infrared illumination and dryingto obtain the nano calcium carbonate. By adopting the preparation method, the problems that an existing procedure is complicated and the granularity is not uniform and is relatively large are solved;the conversion efficiency of the calcium carbonate is effectively controlled through a manner of controlling dissolving and crystallization of calcium hydroxide and the nano calcium carbonate with auniform size is obtained.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a preparation method of nanometer calcium carbonate. Background technique [0002] Nano-calcium carbonate is also called ultra-fine calcium carbonate. The standard name is ultra-fine calcium carbonate. The most mature industry for nano-calcium carbonate is the plastic industry, which is mainly used in high-grade plastic products. Nano-calcium carbonate can improve the rheology of plastic masterbatch and improve its formability. When used as a plastic filler, it has the function of toughening and reinforcing, and can improve the bending strength, bending elastic modulus, heat distortion temperature and dimensional stability of plastics. properties, but also endows the plastic with thermal hysteresis. When used in ink products, nano-calcium carbonate exhibits excellent dispersibility and transparency, excellent gloss, excellent ink absorption and high drying pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B82Y30/00
CPCB82Y30/00C01F11/181C01F11/183C01P2004/64
Inventor 不公告发明人
Owner 绍兴市慧融臻合新能源科技有限公司
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