Method for preparing stable porous amorphous calcium carbonate in alcohol solvent

An amorphous calcium carbonate, porous technology, applied in the field of materials, can solve problems such as unseen, and achieve the effects of low cost, low equipment requirements, and simple process conditions

Pending Publication Date: 2021-11-16
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But for the preparation of stable porous amorphous CaCO in alcohol solvent 3 No related literature reports

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  • Method for preparing stable porous amorphous calcium carbonate in alcohol solvent
  • Method for preparing stable porous amorphous calcium carbonate in alcohol solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Prepare 0.1mol / L calcium chloride ethylene glycol solution and 0.1mol / L potassium carbonate ethylene glycol solution;

[0031] 2. Mix the calcium chloride ethylene glycol solution and potassium carbonate ethylene glycol solution in step 1 at 20°C, stir for 2 minutes to fully react, and then age at 20°C for 1 hour;

[0032] 3. Centrifuge the suspension aged for 1 hour to obtain a precipitate. The precipitate is first treated with glycerin to remove the by-product potassium chloride, and then treated with ethanol to remove the glycerin on the surface, then centrifuged, and then vacuumed at room temperature After drying for 12 hours, a white powder was finally obtained, that is, porous amorphous CaCO3 ;

[0033] 4. Carry out XRD detection and SEM observation to the obtained product, the result is as follows figure 1 (a) and figure 2 , indicating that the obtained product is pure amorphous CaCO 3 , amorphous CaCO 3 Porous irregular particles.

Embodiment 2

[0035] 1. Prepare 0.4mol / L calcium chloride ethylene glycol solution and 0.4mol / L potassium carbonate ethylene glycol solution;

[0036] 2. Mix the calcium chloride ethylene glycol solution and potassium carbonate ethylene glycol solution in step 1 at 0°C, stir for 2 minutes to fully react, and then age at 0°C for 1 week;

[0037] 3. Centrifuge the suspension that has been aged for 1 week to obtain a precipitate. The precipitate is first treated with glycerin to remove the by-product potassium chloride, and then treated with ethanol to remove the glycerin on the surface, then centrifuged, and then vacuumed at room temperature After drying for 12 hours, a white powder was finally obtained, that is, porous amorphous CaCO 3 ;

[0038] 4. Carry out XRD detection to the obtained product, the result is as follows figure 1 (b), indicating that the obtained product is pure amorphous CaCO 3 .

Embodiment 3

[0040] 1. Prepare 0.4mol / L calcium chloride ethylene glycol solution and 0.4mol / L potassium carbonate ethylene glycol solution;

[0041] 2. Mix the calcium chloride ethylene glycol solution and potassium carbonate ethylene glycol solution in step 1 at 20°C, stir for 2 minutes to fully react, and then age at 20°C for 1 day;

[0042] 3. Centrifuge the suspension that has been aged for 1 day to obtain a precipitate. The precipitate is first treated with glycerin to remove the by-product potassium chloride, then treated with ethanol to remove the glycerin on the surface, and then centrifuged, and then heated at room temperature After vacuum drying for 12 hours, a white powder was finally obtained, that is, porous amorphous CaCO 3 ;

[0043] 4. Carry out XRD detection to the obtained product, the result is as follows figure 1 (c), showing that the obtained product is pure amorphous CaCO 3 .

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Abstract

The invention discloses a method for preparing stable porous amorphous calcium carbonate in an alcohol solvent, which comprises the following steps: respectively dissolving calcium chloride powder and potassium carbonate powder in ethylene glycol at normal temperature to obtain a calcium chloride ethylene glycol solution containing an alcohol-calcium chloride complex and a potassium carbonate ethylene glycol solution containing an alcohol-potassium carbonate complex; mixing the calcium chloride ethylene glycol solution and the potassium carbonate ethylene glycol solution, quickly stirring and uniformly mixing, and then standing and aging for 1 hour to 2 months; and after the reaction is finished, carrying out centrifugal treatment on the generated turbid liquid, treating the obtained precipitate by using glycerol to remove a byproduct potassium chloride, treating by using ethanol to remove glycerol on the surface, and finally centrifuging and drying the precipitate treated by using the glycerol and the ethanol to obtain white powder, namely pure porous amorphous calcium carbonate. The process is simple, the porous amorphous calcium carbonate of nano particles is generated through regulation and control of the alcohol-calcium chloride complex and the alcohol-potassium carbonate complex, and the obtained product is good in particle size uniformity.

Description

technical field [0001] The invention belongs to the field of materials and relates to the preparation technology of inorganic non-metallic powder materials, in particular to a method for preparing stable porous amorphous calcium carbonate (CaCO3) in an alcohol solvent. 3 )Methods. Background technique [0002] As an inorganic chemical product, CaCO 3 It is widely used in different fields such as rubber, paint, plastic, paper, ink, daily chemical and medicine. At normal temperature and pressure, there are six kinds of CaCO with the same composition but completely different structures in nature. 3 Minerals, respectively, amorphous CaCO 3 , CaCO 3 ·H 2 O, CaCO 3 ·6H 2 The thermodynamic stability of O, vaterite, aragonite, and calcite increases in turn. In addition to amorphous CaCO 3 Except, other structures are crystalline; CaCO 3 ·H 2 O and CaCO 3 ·6H 2 O is a crystal containing crystal water; three kinds of CaCO, vaterite, aragonite, and calcite 3 Crystals do n...

Claims

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Application Information

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IPC IPC(8): C01F11/18C01D3/04
CPCC01F11/18C01D3/04C01P2004/32C01P2002/72C01P2004/03
Inventor 蒋久信徐圣波肖浩东李沁娱石蕊李安康叶硕
Owner HUBEI UNIV OF TECH
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